Landlord Building Insurance Renewal Help | UK Specialist
Why has UK landlord building insurance renewal become complicated in 2026?
For most landlords, building insurance renewal used to be a 15-minute job: open the renewal letter, glance at the premium, accept or shop around. That settlement no longer holds. The 12 months between May 2025 and May 2026 represent the biggest single shift in UK landlord risk since the introduction of Section 21 in 1988 — and the renewal letter sitting in your inbox almost certainly doesn't reflect the new landscape.
Three forces have converged. First, the Renters' Rights Act 2025 received Royal Assent in October 2025 and Phase 1 commenced on 1 May 2026, abolishing Section 21 "no-fault" evictions, ending fixed-term assured shorthold tenancies, and converting all tenancies to open-ended periodic tenancies with tenant-only break rights. Second, rebuild costs have risen approximately 15% over the last five years — and the Building Cost Information Service (BCIS) forecasts a further 15–18% increase to 2030, driven primarily by labour. Third, UK property insurers paid out a record £6.1 billion in 2025 largely on storms and flooding, and have responded with material premium rises — averaging around 17% year-on-year on single-property landlord policies — alongside tighter underwriting, more aggressive average-clause enforcement, and additional warranties and conditions on renewal.
The result is that landlords who renew on auto-pilot in 2026 are routinely either materially underinsured, paying for cover they don't need, or both. The same renewal letter that increased your premium 17% may also have changed the void-period unoccupancy condition from 60 days to 30 days, narrowed the malicious damage scope, introduced an alarm warranty, or removed loss of rent cover for tenant default — and you wouldn't necessarily notice unless you read the schedule line by line.
This guide is the definitive 2026 landlord building insurance renewal help article — built around the four shifts that matter (the Renters' Rights Act, rebuild cost accuracy, the average clause, and the FCA fair-value framework), the renewal review process that catches the traps, and the specific premium drivers and mitigations that actually work in the current market. It complements our high value residential landlords product page and our overseas investors in UK property insurance page, and sits alongside our broader property cluster including the block of flats insurance guide, commercial property insurance UK guide, and Airbnb and short-let insurance guide.
Key facts at a glance
- The Renters' Rights Act 2025 Phase 1 commenced 1 May 2026 — Section 21 abolished, fixed-term ASTs ended, all tenancies converted to open-ended assured periodic tenancies. The risk shift to landlords is material and most existing policies have not been re-rated for it.
- UK landlord building insurance premiums rose around 17% year-on-year in 2025–2026 — driven by £6.1 billion in 2025 property claim payouts (storms, flooding), 15% construction cost inflation 2020–2025, and tighter underwriting capacity.
- Approximately 70% of UK properties are underinsured — with the average sum insured covering only around 67% of true rebuild cost, according to RebuildCostASSESSMENT.com data. The average clause means a 30% underinsurance becomes a 30% claim reduction.
- Rebuild cost is not market value — and most landlords confuse them. Rebuild cost (the basis of your sum insured) excludes land and reflects reconstruction labour, materials, professional fees, debris removal, and compliance with current Building Regulations.
- The FCA's Insurance Conduct of Business Sourcebook (ICOBS) requires fair-value pricing and prohibits "price walking" — but renewal premiums must still be commercially justified. Loyalty discounts have largely disappeared since the 2022 reforms.
- Awaab's Law extends to the private rented sector in 2026–2027 — Phase 1 (October 2025) covered social housing damp and mould; Renters' Rights Act provisions extend equivalent duties to private landlords with downstream implications for landlord policy claims and conditions.
- Renewal premiums for UK landlord building insurance typically run £180–£1,800+ per property in 2026 — depending on rebuild cost, postcode flood/subsidence exposure, property type, tenant profile, claims history, and cover scope. Median single-property cover is around £285 per year.
1. What's changed for landlord renewals in 2026: the 8 forces summary table
The eight forces below are reshaping landlord building insurance renewal in 2026. Some — premium inflation, rebuild cost drift — are quantifiable and addressable directly. Others — Renters' Rights Act risk shift, Awaab's Law extension — change the underlying risk profile in ways your existing policy was never designed for. The renewal review process below addresses all eight in sequence.
| Force | Frequency | Impact | Primary Mitigation |
|---|---|---|---|
| Renters' Rights Act 2025 risk shift | Universal from 1 May 2026 | High — affects voids, tenant default, possession timelines | Loss of rent extended scope, RGI, legal expenses |
| Rebuild cost drift / underinsurance | Affects ~70% of UK properties | High — average clause cuts claims proportionally | RICS-aligned rebuild cost reassessment |
| Premium inflation 17% YoY | Universal | Medium-High — direct cash impact | Broker placement, panel comparison, structural review |
| Flood and subsidence claim exposure | Postcode-dependent | High where exposed — £6.1bn 2025 payouts | Flood Re scheme eligibility, mitigation, specialist placement |
| Void period / unoccupancy condition tightening | Common at renewal | High — uninsured loss if breached | Read schedule carefully; declare voids honestly |
| Awaab's Law extension to PRS | Rolling 2026–2027 | Medium — operational and liability exposure | Damp and mould response protocol; contractor panel |
| Loss of rent scope narrowing | Common at renewal | Medium-High — income protection gap | Verify trigger, indemnity period, sub-limits |
| Non-disclosure under Insurance Act 2015 | Common (often unnoticed) | Catastrophic — claim avoidance | Fair presentation discipline at every renewal |
2. How does the Renters' Rights Act 2025 change your renewal exposure?
The Renters' Rights Act 2025 is the most significant change to UK private rented sector law in a generation. Royal Assent in October 2025; Phase 1 commencement on 1 May 2026; Phase 2 (Private Rented Sector Database, Decent Homes Standard) following later in 2026; Phase 3 rolling through 2027–2028. From a building insurance renewal perspective, four specific changes alter the risk that your policy is being asked to cover.
Change 1: Section 21 abolition and periodic tenancies
From 1 May 2026, all assured shorthold tenancies became assured periodic tenancies with no fixed term. Landlords can no longer serve a Section 21 "no-fault" eviction notice. Possession can only be obtained under specified statutory grounds (rent arrears, sale, redevelopment, anti-social behaviour, etc.), each with strengthened evidential requirements and longer notice periods. The first 12 months of any new tenancy are protected from possession on most grounds. Tenants can serve two months' notice at any time without reason.
The insurance consequence: void periods are likely to be more frequent and harder to predict; possession timelines are longer and more uncertain; tenant default situations (rent arrears, antisocial behaviour) take longer to resolve and generate longer rent loss periods. Loss of rent cover scope and rent guarantee insurance (RGI) become materially more important — and many existing landlord policies have a 12-month loss of rent indemnity period that was designed around a 6-month AST possession timeline. In 2026 that may be inadequate.
Change 2: Private Rented Sector Database registration
The Act establishes a national Private Rented Sector Database with mandatory landlord registration. Registration is a precondition for serving valid possession notices. Failure to register or providing false information attracts civil penalties. From an insurance perspective: registration status may become a disclosure question at proposal/renewal; landlord legal expenses cover should respond to disputes arising from registration or removal; the database increases regulator visibility of landlord conduct generally.
Change 3: Decent Homes Standard extension to PRS
The Act extends the Decent Homes Standard (previously social housing only) to the private rented sector. Properties must meet thresholds on physical condition, tenant safety, hygiene, and adequate heating/cooling. Local authorities have expanded enforcement powers with civil penalty fines for non-compliance. The insurance consequence: property condition becomes increasingly material at renewal; older or non-compliant stock may attract loadings or specific exclusions; remedial works to meet the Standard may need contractor insurance disclosure of their own.
Change 4: Rent bidding ban and rent increase restrictions
Rent bidding is prohibited (landlords cannot accept offers above marketed rent). Rent increases are capped at one per year, must be served via Section 13 notice, and can be challenged at First-tier Tribunal. The insurance consequence: rent declared on policy proposals must match what's actually being charged (not what you'd like to be charging); tribunal challenges create legal expense exposure; loss of rent calculations should be based on actual recoverable rent, not aspirational rent.
3. Why is rebuild cost the single biggest renewal trap landlords face?
If you take one action from this guide, make it this: verify your rebuild cost at every renewal. Approximately 70% of UK properties are underinsured. The average underinsured property has a sum insured at just 67% of its true rebuild cost. The reason is rarely careless underwriting — it's that rebuild costs have moved materially while sums insured have followed only general index-linking that hasn't kept pace with real labour and materials inflation.
Why rebuild cost is not market value
Market value reflects land, location, demand, and supply factors. Rebuild cost is the cost of reconstructing the building from the foundation up if it were destroyed — labour, materials, professional fees (architect, structural engineer, building control), demolition and debris removal, scaffolding, site security, and compliance with current Building Regulations. Land is excluded because the land remains after a fire or other peril destroys the building.
For most UK properties, rebuild cost is 40–70% of market value. For inner London terraces, listed buildings, conservation areas, properties with specialist construction (timber frame, thatched roof, stone), the rebuild cost can exceed market value. The mismatch matters because if you insure at market value (£500,000 say) but the true rebuild cost is £800,000, you are 37.5% underinsured — and the average clause will reduce every claim by 37.5%, not just a total loss.
Why index-linking is not enough
Most landlord policies apply automatic index-linking at renewal — typically tracking the BCIS House Rebuilding Cost Index or a similar measure. Index-linking is essential but insufficient. It only adjusts the existing sum insured for inflation; it cannot correct an originally inaccurate sum insured. If your original sum was wrong (which is statistically likely), every year's index-linking compounds the gap in absolute terms while the proportional underinsurance stays constant or worsens.
The fix is a proper rebuild cost reassessment — either a RICS-qualified surveyor's reinstatement valuation for material properties, or a structured online assessment tool aligned to BCIS data for standard residential. Industry guidance is to reassess every 3–5 years; sooner if you have done extensions, conversions, or significant refurbishment that changes the floor area or specification.
4. What is the average clause and how badly can it cut your claim?
The Average Clause — The Underinsurance Penalty
The average clause — also called the Condition of Average — is contained in virtually every UK buildings insurance policy. It applies wherever the sum insured is less than the true value at risk. The effect is proportional: if you are 30% underinsured, every claim is reduced by 30%. Not just total losses. A £15,000 escape-of-water claim on a property that's 30% underinsured pays £10,500.
Worked example. Property true rebuild cost £400,000. Policy sum insured £280,000. Underinsurance: £120,000, which is 30% of the true value. A kitchen fire causes £40,000 damage. The insurer applies the average clause: £40,000 × (£280,000 ÷ £400,000) = £28,000 payable. £12,000 of the loss is uninsured. The landlord pays the £12,000 shortfall personally.
It gets worse. Loss of rent cover is usually expressed as a percentage of the buildings sum insured (typically 20–25%). If the buildings sum is underinsured, the loss of rent cover is mechanically reduced by the same proportion at claim stage. A 30% underinsurance scenario therefore creates a 30% shortfall on rent recovery as well — at the exact moment when you most need that income to bridge the void period during repairs.
Proper rebuild cost assessment at the inception of cover; reassessment every 3–5 years (and after any extension, conversion, or major refurbishment); annual review of index-linking adequacy against actual BCIS movement; understanding that "automatic uplift" or "rebuilding inflation cover" wordings have caps that may not protect you if you started underinsured; choosing policies with explicit "no-average" or "day-one reinstatement" clauses where these are available and the price differential is justified.
The renewal letter is your annual chance to fix this. Verify rebuild cost using a credible methodology. If you can't justify the current sum insured against a current rebuild cost assessment, increase it — even if it costs more in premium. The premium increase is a small fraction of the claim shortfall the average clause would create. There is no insurance argument for being underinsured.
5. Why have landlord building insurance premiums risen so sharply?
The 17% average year-on-year increase in landlord building insurance premiums during 2025–2026 has four distinct drivers — each with different implications for renewal strategy.
Driver 1: Claims inflation and weather losses
UK property insurers paid out a record £6.1 billion in 2025, with the largest share from storm damage and flooding. Storm Henk (2024), Storm Lilian (2025), and a series of named storms across both years drove claim frequency and severity. The Met Office's UK Climate Projections continue to forecast increased storm intensity and rainfall variability. Insurers price for forward claims expectation, not historic claims experience, which means high-claim years feed into premium structures for several years afterward.
Driver 2: Construction cost inflation
BCIS data shows UK construction costs rose approximately 15% across 2020–2025, driven primarily by labour rather than materials. The same data forecasts a further 15–18% rise across 2025–2030 — again labour-led, reflecting skills shortages in trades, the impact of Brexit on EU labour availability, and National Living Wage / employer National Insurance increases. Higher reinstatement costs mean higher claim severity; higher claim severity means higher premiums.
Driver 3: Reinsurance market hardening
UK insurers buy reinsurance to protect against catastrophe losses. Global reinsurance pricing hardened materially across 2022–2025 following Hurricane Ian, Australian floods, and European storms. Higher reinsurance costs flow directly into primary insurance premiums. The reinsurance market has been more stable through 2026 but is not softening at a rate that would pass through to consumers quickly.
Driver 4: FCA fair-value pricing reforms
The FCA's general insurance pricing reforms (effective January 2022) ended "price walking" — the practice of charging loyal renewing customers more than new customers. The intent was consumer protection; the side-effect has been compression of new-business discounts. Landlords who previously rotated annually between cheap new-business offers now find the cheap quotes no longer exist. Premiums are commercially priced from year one, which makes the renewal market structurally less volatile in pricing but on average higher.
6. What do FCA fair-value rules mean for your renewal?
The Financial Conduct Authority's Insurance Conduct of Business Sourcebook (ICOBS), combined with the General Insurance Pricing Practices rules effective January 2022, governs how landlord building insurance is priced and presented. The rules matter at renewal in three specific ways.
No price walking. Insurers cannot charge renewing customers more than they would charge new customers for the equivalent policy. If your renewal is materially higher than the same insurer's current new-business quote for the same risk, you have a complaint route — though in practice insurers usually price renewal and new-business at the same level rather than risk the regulatory breach.
Fair value assessment. Insurers must demonstrate that policies deliver fair value to customers — that the price reflects genuine cover, not commission stacking or distribution margin that doesn't translate into customer benefit. The FCA has taken action against several insurers and brokers for fair-value failures. From a landlord renewal perspective, this means premium loading for non-essential add-ons should be transparent and justified.
Renewal notification requirements. Insurers must show the previous year's premium alongside the renewal premium when communicating renewal, must give adequate notice (typically at least 21 days), and must enable easy comparison. The renewal letter should give you the information to make a structured comparison — and if it doesn't, that itself is a signal to engage a broker.
The fair-value framework doesn't mean renewals must be cheap, only that they must be commercially justified. A 17% renewal increase in a market with 17% average inflation is not unfair value; a 50% renewal increase against an unchanged risk would warrant scrutiny.
7. Landlord renewal cover checker
Select your landlord profile below to see the renewal review priorities matched to your specific property and tenancy profile. For Miller & Partner's main landlord product pages see high value residential landlords and overseas investors in UK property insurance.
Landlord Renewal Cover Checker
Select your landlord profile to see the renewal review priorities matched to your specific property and tenancy profile
Single Buy-to-Let Landlord
- ESSENTIAL Buildings sum insured verified against current rebuild cost — not market value, not last year's figure
- ESSENTIAL Property Owners' Liability £2m–£5m for injury/damage claims by tenants and visitors
- ESSENTIAL Loss of rent — indemnity period 12–24 months given extended Renters' Rights Act possession timelines
- ESSENTIAL Malicious damage by tenant scope (often excluded by default — check schedule)
- ESSENTIAL Void / unoccupancy condition reviewed — typical 30–60 day limit, what counts as occupied
- RECOMMENDED Legal expenses with possession proceedings scope
- RECOMMENDED Rent guarantee insurance (RGI) — particularly important under Section 21 abolition
- RECOMMENDED Accidental damage by tenant — explicit extension if available
- CONSIDER Home emergency cover — boiler, plumbing, drains
Multi-Property Portfolio Landlord
- CRITICAL Portfolio rebuild cost review across all properties — single inaccuracy can compromise aggregate cover
- ESSENTIAL Single portfolio policy vs individual policies — administrative simplicity vs flexibility trade-off
- ESSENTIAL Property Owners' Liability £5m minimum portfolio-wide
- ESSENTIAL Loss of rent across portfolio with extended indemnity periods
- ESSENTIAL Mid-term acquisition / disposal notification protocols documented
- ESSENTIAL Legal expenses with comprehensive scope including Section 13 rent disputes and Tribunal challenges
- ESSENTIAL Renters' Rights Act 2025 documentation pack — PRS Database registration, Decent Homes compliance evidence
- RECOMMENDED Cyber insurance for tenant data and digital platform exposure
- RECOMMENDED Directors and Officers cover if portfolio held through company
HMO Landlord
- CRITICAL HMO status MUST be specifically declared — failure is the #1 HMO claim dispute driver
- ESSENTIAL Property Owners' Liability £5m minimum (often required by HMO licence)
- ESSENTIAL Buildings sum insured reflecting HMO conversion costs (fire doors, escape routes, compartmentation)
- ESSENTIAL Malicious damage scope — higher exposure with multiple unrelated occupants
- ESSENTIAL Loss of rent at room level not property level — partial voids common in HMO
- ESSENTIAL Fire safety warranty compliance — alarm systems, fire doors, signage
- ESSENTIAL HMO licence conditions met and evidenced at proposal
- RECOMMENDED Landlord contents cover for shared furnished areas
- RECOMMENDED Legal expenses with HMO-specific scope
Block of Flats / Freeholder
- CRITICAL Block insurance is freeholder duty under lease — see our block of flats specialist guide
- ESSENTIAL Whole-block rebuild cost assessment by RICS surveyor — individual flat estimates insufficient
- ESSENTIAL Property Owners' Liability £10m given multiple leaseholders / visitors
- ESSENTIAL Lift cover, communal area, plant and machinery cover
- ESSENTIAL Cladding-related disclosure (EWS1 status, remediation status) — post-Grenfell underwriting
- ESSENTIAL Terrorism cover for blocks above sum-insured thresholds
- ESSENTIAL Service charge recovery mechanism — premium recovery from leaseholders documented
- ESSENTIAL Loss of rent / loss of ground rent where applicable
- RECOMMENDED Directors and Officers cover for RTM / RMC directors
Overseas Investor in UK Property
- CRITICAL Specialist placement required — see our overseas investors product page
- ESSENTIAL UK rebuild cost assessment — overseas-based assessments often inadequate
- ESSENTIAL UK-based property management partner documentation (agent details, contact protocols)
- ESSENTIAL Void periods declared honestly — overseas portfolios often have longer voids
- ESSENTIAL Currency provisions and claim settlement methodology declared
- ESSENTIAL Property Owners' Liability £5m–£10m
- ESSENTIAL Compliance documentation pack — registration, tax status, Decent Homes Standard
- RECOMMENDED Legal expenses with cross-border scope
High-Value / Listed Property
- CRITICAL Specialist Lloyd's market placement essential — see our high value residential landlords page
- ESSENTIAL RICS reinstatement valuation (not online tool) — listed buildings often have rebuild cost exceeding market value
- ESSENTIAL Listed building / Conservation Area replacement provisions — like-for-like specification, traditional materials, specialist trades
- ESSENTIAL Day-one reinstatement / no-average clause provisions where available
- ESSENTIAL Property Owners' Liability £5m–£10m
- ESSENTIAL Contents cover including any landlord-supplied furnishings at scheduled values
- ESSENTIAL Extended loss of rent indemnity period — listed building repairs take materially longer
- ESSENTIAL Subsidence cover review (heritage stone properties often higher risk)
- RECOMMENDED Terrorism cover
8. Pre-renewal readiness self-check
The 14 checks below are what a structured landlord renewal review covers. Tick each item your operation has in place ahead of renewal. The unchecked items are your priority renewal review areas — the more boxes ticked, the smoother (and cheaper) your renewal will be.
Pre-Renewal Readiness Self-Check
Click each item you have in place ahead of your next renewal. The unchecked items are your priority review areas.
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Rebuild cost reassessed within the last 3 years — RICS surveyor or credible BCIS-aligned online tool, not just index-linked from inception
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Any extensions, conversions, or major refurbishment notified to insurer — failure to notify is a common non-disclosure claim dispute trigger
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Tenancy type accurately declared — AST, HMO, holiday let, company let, social housing — material to underwriting
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Void periods declared honestly — including current voids and typical void lengths between tenancies
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Loss of rent indemnity period reviewed against Renters' Rights Act possession timelines — 12 months may no longer be enough
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Property Owners' Liability limit appropriate for tenant profile and property type — minimum £2m, typically £5m for HMOs, £10m for blocks
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Malicious damage by tenant explicitly included — many policies exclude this by default; explicit extension recommended
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Damp and mould response protocol documented — Awaab's Law extension to PRS approaching; written complaint and response process essential
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Gas Safety, EICR, EPC, smoke/CO alarm compliance evidenced — failure to comply can void cover under warranty conditions
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Flood Re scheme eligibility checked for flood-zone properties — pre-2009 built homes in flood-zone postcodes only
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Schedule read line by line, not just the headline premium — exclusions, warranties, sub-limits, and conditions vary materially between insurers
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Material changes to property or tenancy in last 12 months declared — change of tenant type, conversion, extension, alarm changes
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PRS Database registration status confirmed and documented — relevant from later phases of Renters' Rights Act rollout
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Specialist broker review undertaken — particularly for portfolios, HMOs, blocks, overseas investors, listed buildings, or any non-standard scenario
9. Landlord renewal exposure assessor
Two factors drive landlord renewal exposure above all others: the complexity of your property/tenancy profile and how recently you've reviewed cover and rebuild cost. Use the tool below for your specific exposure profile.
Landlord Renewal Exposure Assessor
Select your portfolio profile and review recency to see your specific renewal exposure profile and recommended action
10. Risk 6: Void periods and unoccupancy conditions
Void Periods and Unoccupancy — The Hidden Renewal Trap
Every landlord building insurance policy contains an unoccupancy condition. The condition specifies the maximum number of consecutive days the property may be unoccupied before cover restricts or is suspended. Typical wordings: 30 days, 45 days, 60 days. Beyond that period, the policy usually restricts to FLEA perils only (Fire, Lightning, Earthquake, Aircraft) — meaning escape of water, malicious damage, theft, and other common causes of loss are excluded until the property is re-occupied.
The renewal trap: insurers have tightened unoccupancy conditions across 2024–2026 in response to claims experience. A policy that allowed 60 days unoccupied in 2023 may now allow only 30 days. The renewal documentation usually mentions this only in the schedule small print, not the headline. Landlords renew without noticing, then experience a void period that exceeds the new limit, then suffer an uninsured escape-of-water loss during what they assumed was insured void time.
Under the Renters' Rights Act 2025, void frequency is likely to increase. Tenants can serve two months' notice at any time without reason. Possession via the new statutory grounds takes longer and produces longer voids during possession proceedings. The combination of more frequent voids and tighter unoccupancy conditions is a structural cover gap that landlords need to address at renewal.
Read the unoccupancy condition line in the renewal schedule at every renewal — don't assume continuity from prior years. Negotiate longer unoccupancy periods (60–90 days) with broker if your typical void length exceeds the standard limit. Comply with unoccupancy mitigation requirements during voids: heating left on at minimum 15°C, water systems drained or kept in use, post collected, regular inspections. Document inspections. Notify insurer if the void extends beyond the condition limit — extended unoccupancy cover can usually be added mid-term at modest cost. Declare current voids and typical void lengths honestly at proposal/renewal.
Standard landlord building insurance with unoccupancy condition clearly understood. Extended unoccupancy cover available as policy extension for landlords with longer typical voids. Refurbishment cover for properties undergoing major works (a different cover from unoccupancy — should be separately notified). Where unoccupancy was undeclared at proposal and a claim arises, expect insurer to consider non-disclosure remedies. Claim values can be substantial: escape of water in an unoccupied property typically £15k–£60k+ if undetected for weeks.
11. Risk 7: Awaab's Law extension to the private rented sector
Damp and Mould Liability — Renters' Rights Act Extension
Awaab's Law — the popular name for the Hazards in Social Housing (Prescribed Requirements) (England) Regulations 2025 — commenced for social housing on 27 October 2025. The Renters' Rights Act 2025 extends an equivalent framework to the private rented sector through 2026–2027, alongside the application of the Decent Homes Standard to private rentals. Landlords now face statutory duties to investigate, report on, and begin repair of damp and mould hazards within prescribed timeframes — with civil penalties and tenant compensation routes for non-compliance.
The insurance implication for landlords: damp and mould complaints become a higher-frequency claim category; tenant compensation claims for health impacts of damp and mould become a Property Owners' Liability exposure; remedial works can be substantial (root cause investigation, methodology-led remediation, warranty terms) and need to be procurable rapidly; failure to respond within statutory timeframes can trigger local authority enforcement and Housing Ombudsman engagement with reputational and financial consequences.
Document a written damp and mould response protocol with clear timeframes — typically 10 working days to investigate, 3 to provide written summary, 5 to begin works (mirroring the social housing framework even ahead of full PRS commencement). Maintain a specialist mould remediation contractor relationship — see our mould cleaning business insurance guide for what to look for in a contractor's insurance. Address root causes (ventilation, condensation, building fabric) not just visible mould. Keep documentary records of complaints and responses.
Property Owners' Liability for tenant health-related claims. Buildings insurance for property damage caused by damp/mould (often with specific exclusions — check schedule). Legal Expenses cover with Housing Ombudsman and local authority enforcement scope. Loss of rent where remediation work renders property uninhabitable. Tenant compensation claims £2k–£25k typical; major health impact claims can reach £50k+. Property damage from chronic damp can reach £30k+ where building fabric is affected.
12. Risk 8: Non-disclosure under the Insurance Act 2015
Non-Disclosure at Renewal — The Most Preventable Catastrophe
The single most common reason UK landlord insurance claims are reduced or declined isn't bad luck — it's non-disclosure at the proposal or renewal stage. The Insurance Act 2015 requires the policyholder to make a "fair presentation of the risk" — proactively disclosing every material fact the insurer would want to know. Failure to do so allows the insurer to: avoid the policy (treat it as never having existed); reduce the claim proportionally; impose terms that would have applied with proper disclosure.
The renewal-specific traps are extensive. Tenancy type changes (single family let → HMO → company let → holiday let) aren't notified. Property alterations (extension, loft conversion, garage conversion, basement) aren't notified — and also aren't reflected in the rebuild cost. Tenant claims, criminal convictions of you or co-owners, county court judgments, bankruptcies aren't disclosed when they should be. Material changes to occupancy (longer void periods, change of letting agent, change of mortgage arrangement) aren't notified. Each undeclared change creates a non-disclosure point that surfaces only at claim stage.
Maintain a renewal disclosure file for each property containing: current tenancy details, occupancy status, any alterations during the policy year, claims notified, any material changes to your circumstances. At renewal, share this file with your broker proactively rather than relying on insurer questions. Where questions are asked, answer them fully — partial answers are common non-disclosure traps. Where you're uncertain whether something is material, disclose it anyway — over-disclosure has no cost; under-disclosure has catastrophic cost. Document every disclosure made (email trail to broker, retained correspondence).
There is no insurance response to non-disclosure — that's the whole point. The cover that should have responded doesn't. The only mitigation is at the proposal/renewal stage: detailed disclosure, broker discipline, and written confirmation. Specialist landlord broker placement makes a material difference here — generic price-comparison placements often miss the questions that would expose non-disclosure, while specialist brokers know exactly what each insurer expects to see at proposal. Insurance Act 2015 remedies depend on whether the breach was deliberate/reckless (full avoidance) or merely careless (proportional remedy).
13. What drives the cost of landlord building insurance in 2026?
Landlord building insurance pricing in 2026 reflects the 17% market-wide premium inflation plus property-specific and policyholder-specific factors. Indicative annual premium ranges per single property:
| Property Profile | Indicative 2026 Annual Premium |
|---|---|
| Standard single BTL — 3-bed semi, standard tenant, low-risk postcode | £180–£320 |
| Single BTL median — UK national average for buildings-only | £285–£420 |
| HMO landlord — 4–6 occupants, licensed, standard postcode | £550–£950 |
| Inner London / high-cost area BTL — Zone 1-3 standard property | £600–£1,200 |
| Flood-zone property — Flood Re eligible | £450–£1,100 |
| Block of flats (per flat equivalent) — 6–20 flat block, standard build | £280–£550 per flat |
| Listed building / heritage property — RICS reinstatement basis | £900–£2,500+ |
| High-value residential — £1.5m+ rebuild cost, specialist placement | £1,200–£4,000+ |
The factors below drive both the renewal premium and the overall cover certainty. The rating impact within each profile band is typically larger than the differential between profile bands — meaning a single BTL with poor disclosure can pay more than a standard portfolio with excellent disclosure. For commercial property cost dynamics see also our commercial property insurance UK guide.
| Rating Factor | Impact on Premium | What You Can Do |
|---|---|---|
| Rebuild cost / sum insured | Primary scaling factor — directly drives premium | Accurate assessment; avoid both under- and over-insurance |
| Postcode flood/subsidence exposure | Can double or treble base premium in worst areas | Check Flood Re eligibility; document mitigation |
| Property type and construction | Standard brick lowest; non-standard (timber frame, listed, thatched) higher | Declare accurately; specialist placement for non-standard |
| Tenancy type | HMO and DSS/LHA tenant typically higher; family let lower | Declare specifically; HMO licence essential where applicable |
| Claims history (5-year) | Material — recent escape of water or subsidence material rating impact | Document root cause and remedial action after any claim |
| Property age and condition | Older properties higher; well-maintained reduces rating | Document maintenance, electrical condition (EICR), gas safety |
| Security and fire safety provisions | Modest discount for documented systems | BS-rated alarm system, locks, smoke/CO compliance evidenced |
| Void / unoccupancy profile | Higher voids typically attract loadings or condition tightening | Declare honestly; mitigation arrangements during voids documented |
| Limits and excess selected | Higher excess reduces premium; higher liability limits add modestly | Match excess to your capacity for self-funded losses |
| Cover scope (basic vs comprehensive) | Day-one reinstatement, no-average, accidental damage, malicious damage all add | Stack the extensions that match your claim exposure profile |
| Renters' Rights Act-relevant scope (RGI, extended LoR) | Modest uplift but high value under new possession framework | Add RGI; extend loss of rent indemnity to 18-24 months |
| Continuity with insurer | 2+ years with same insurer typically reduces renewal premium 3-7% | Strategic continuity decision; don't chase £50 savings |
| Broker placement | Specialist landlord brokers access better terms than comparison sites | Use a broker with specialist landlord underwriting experience |
14. Real claims and how to manage them
Claim — Average Clause Reduction, £37,500 Loss
A landlord owned a four-bedroom Victorian terrace in south-east London, let to a family on an AST. Buildings sum insured £320,000, set at policy inception in 2016 and index-linked annually since. The actual rebuild cost in 2025, assessed retrospectively by a RICS surveyor after the claim, was £510,000. The landlord was 37% underinsured — the sum insured had been broadly correct in 2016 but rebuild costs had risen materially faster than the index-linked uplift through the 2020s, particularly the labour cost inflation post-Brexit and post-COVID.
An escape of water from a failed flexi-tap connector in the upstairs bathroom flooded for approximately 48 hours while the tenants were away for a long weekend. Water damage to the bathroom, two bedrooms, the hallway, the kitchen ceiling below, and the kitchen units. Loss assessor estimated £100,000 in reinstatement costs including alternative accommodation for the tenants during a 4-month repair period.
The insurer applied the average clause: £100,000 × (£320,000 ÷ £510,000) = £62,750 payable. Loss of rent cover was also reduced proportionally: rather than £8,000 over four months at full rent, the policy paid approximately £5,020. Total settlement: £67,770. Total loss to landlord: £100,000 reinstatement + £8,000 rent loss = £108,000. Out-of-pocket exposure: £40,230, plus a £2,500 excess. The landlord's mortgage payment continued throughout the void period.
Post-claim renewal: rebuild cost re-set to £510,000; premium increased 42% reflecting the higher sum insured and the claim. The landlord switched to a specialist broker placement at next renewal, with a RICS reinstatement valuation refreshed every 3 years.
The lesson: index-linking is necessary but not sufficient. Periodic rebuild cost reassessment is the only defence against the average clause. The £40,000 out-of-pocket exposure was created over 9 years of incremental underinsurance — a problem that a single £350 RICS valuation could have prevented.
Claim — Non-Disclosure Avoidance, £78,000 Loss
A landlord owned a 4-bedroom semi-detached house in the Midlands, let in 2019 as a family let on an AST. In 2022, the landlord converted the property to a 5-bed HMO (one bedroom converted from the dining room), licensed under the local authority's additional licensing scheme. The conversion involved fire door upgrades, alarm system upgrade, additional cooking facilities in the kitchen. The landlord renewed the buildings insurance annually through a comparison-site placement, never updating the declared tenancy type or property layout.
In 2025, a kitchen fire — investigated by Fire and Rescue Service and traced to a faulty cooker — caused £130,000 of damage including significant smoke damage throughout the upper floors. The fire spread was assessed as more rapid than typical for a family let, attributable to the additional cooking facility added during the HMO conversion and inadequate compartmentation in the converted dining-room-to-bedroom.
At claim stage, the insurer's investigator identified the HMO licence, the dining-room conversion, and the additional cooking facility — none of which were on the proposal documentation. The original 2019 proposal had declared "family let" and "no alterations". Subsequent annual renewals had not updated this. The insurer invoked Insurance Act 2015 remedies: the breach was characterised as careless rather than deliberate, but the insurer demonstrated it would have rated differently (higher premium, fire safety warranties, possibly different terms) had the HMO conversion been declared.
Proportional remedy applied: the insurer paid approximately 40% of the loss, reflecting what it would have paid had the policy been priced correctly. Settlement: £52,000. Out-of-pocket loss to landlord: £78,000 plus alternative accommodation costs for displaced HMO tenants during the 7-month rebuild that the policy did not cover at full amount.
The lesson: any material change to a property or tenancy must be disclosed mid-term, not waited for renewal. Conversion to HMO is the textbook material change. The annual renewal habit of "tick the boxes the same as last year" is the cause of most non-disclosure findings. Specialist broker placement with annual structured disclosure review prevents this entirely.
Claim — Loss of Rent Indemnity Period Inadequacy, £24,000 Loss
A landlord owned a 3-bedroom terraced house let on a periodic AST that converted to an assured periodic tenancy on 1 May 2026 under the Renters' Rights Act. In July 2026, the landlord wished to recover possession to sell. Under the new regime, this required serving notice on the "intention to sell" statutory ground, with a 4-month notice period, followed by court possession proceedings that took a further 6 months due to court backlogs and a tenant defence. Total possession timeline: approximately 11 months.
The landlord's buildings insurance policy included loss of rent cover with a 12-month indemnity period, triggered by an insured peril rendering the property uninhabitable. In November 2026, while possession proceedings were ongoing, a major escape of water claim made the property uninhabitable for an estimated 4 months of repairs. The loss of rent cover responded — but only for the 4-month repair period at full rent, totalling approximately £6,400.
The landlord had assumed that the loss of rent indemnity would also cover the income loss during the additional possession-related delay caused by needing to re-house the tenants temporarily and the further postponement of sale. It didn't. Loss of rent cover responds to income loss caused by the insured peril, not to broader market or possession-related income losses. The landlord faced approximately £24,000 in income loss across the extended possession timeline that the policy did not respond to.
Post-claim renewal: the landlord added rent guarantee insurance (RGI) to address tenant default scenarios separately, and extended the loss of rent indemnity period to 24 months to reflect the extended possession timelines under the new regime. Premium increased approximately 18%.
The lesson: loss of rent and rent guarantee insurance are separate covers addressing separate exposures. Under the Renters' Rights Act 2025, both are materially more important than before. Renewal review should specifically reconsider indemnity periods, RGI scope, and the interplay between possession proceedings and insured-peril rent loss.
Renewal Review Steps
How to conduct a structured landlord building insurance renewal review in 2026 — the steps below address the four major risk shifts (Renters' Rights Act, rebuild cost drift, FCA fair-value, and Awaab's Law extension) systematically:
- Pull the schedule from your current policy, not just the renewal letter. The renewal letter shows the premium; the schedule shows the cover. Print or save the schedule for line-by-line review.
- Verify rebuild cost against a current assessment. If it's been more than 3 years (or 1 year for high-value/listed), commission a current rebuild cost reassessment — RICS for material properties, BCIS-aligned online tool for standard residential.
- Review the loss of rent indemnity period against Renters' Rights Act possession timelines. 12 months may no longer be enough. Extending to 18–24 months has modest premium impact and large cover certainty impact.
- Check the unoccupancy condition. Compare against your typical void length. If voids exceed the condition limit, extended unoccupancy cover is available; don't run the gap uninsured.
- Verify malicious damage by tenant scope. Often excluded by default. Explicit extension recommended particularly for HMO and DSS/LHA tenants.
- Document all material changes in the last 12 months. Property alterations, tenancy type changes, claims, criminal convictions, CCJs, bankruptcies. Email these to your broker proactively.
- Confirm tenant profile declared matches actual. Family let vs HMO vs DSS vs holiday let vs company let — each is material to underwriting and pricing.
- Compare renewal premium to current new-business pricing for the same risk. FCA fair-value rules prohibit price walking; renewal should not exceed new-business pricing for equivalent cover.
- Stack cover extensions that match your exposure profile. RGI under Renters' Rights Act framework; legal expenses with possession scope; accidental damage; home emergency. Each adds modestly to premium with material claim certainty value.
- Specialist broker review for complex profiles. HMO, blocks, listed, overseas, large portfolio — specialist Lloyd's market placement typically beats comparison-site placement on both cover and (often) price for these profiles.
Glossary of landlord building insurance terms
- Renters' Rights Act 2025
- UK statute reforming the private rented sector. Royal Assent October 2025; Phase 1 commenced 1 May 2026. Abolishes Section 21 no-fault evictions, ends fixed-term assured shorthold tenancies, introduces assured periodic tenancies, restricts rent increases, prohibits rent bidding, establishes Private Rented Sector Database, extends Decent Homes Standard to PRS.
- Rebuild Cost / Reinstatement Cost
- The cost of reconstructing a building from foundation up if destroyed. Includes labour, materials, professional fees, demolition, debris removal, site security, scaffolding, and Building Regulations compliance. Excludes land. The correct basis for buildings insurance sum insured — not market value.
- Average Clause / Condition of Average
- Provision in virtually all UK buildings insurance policies allowing the insurer to reduce any claim proportionally where the sum insured is less than the true value at risk. 30% underinsurance produces 30% claim reduction — applies to all losses, not just total losses.
- BCIS (Building Cost Information Service)
- UK industry body publishing construction cost indices used as the standard reference for rebuild cost calculations and index-linking. The BCIS House Rebuilding Cost Index is the most common reference for residential property insurance.
- RICS (Royal Institution of Chartered Surveyors)
- Professional body for property surveyors. RICS-qualified surveyors conduct reinstatement valuations for buildings insurance purposes — the highest-credibility basis for sum insured calculations on material or non-standard properties.
- Unoccupancy Condition
- Standard policy provision restricting cover where the property is unoccupied for more than a specified period (typically 30, 45, or 60 days). Beyond the period, cover typically restricts to FLEA perils only.
- FLEA Perils
- Fire, Lightning, Earthquake, Aircraft — the limited perils to which cover typically restricts when a property exceeds the unoccupancy condition limit. Escape of water, theft, malicious damage, and accidental damage are typically excluded during unoccupancy.
- Loss of Rent Cover
- Insurance cover responding to rental income loss where the property is rendered uninhabitable by an insured peril. Typically expressed as a percentage of buildings sum (20–25%) with an indemnity period of 12–24 months. Distinct from rent guarantee insurance.
- RGI (Rent Guarantee Insurance)
- Insurance covering rental income loss due to tenant default (arrears) — distinct from loss of rent which covers loss due to insured peril. Increasingly important under Renters' Rights Act 2025 given longer possession timelines.
- Property Owners' Liability
- Public liability cover responding to third-party injury or property damage claims arising from your ownership of the let property. Typical limits £2m, £5m, £10m depending on property type and tenant profile.
- Malicious Damage by Tenant
- Cover extension responding to deliberate damage caused by tenants. Often excluded by default in standard landlord policies; explicit extension recommended particularly for HMO, DSS/LHA, and student tenancies.
- Insurance Act 2015
- UK statute governing commercial insurance contracts. Requires the policyholder to make a "fair presentation of the risk" — proactively disclosing all material facts. Non-compliance allows the insurer to avoid the policy (deliberate/reckless breach) or reduce claims proportionally (careless breach).
- FCA Fair Value Rules
- The Financial Conduct Authority's general insurance pricing rules effective January 2022. Prohibit "price walking" (charging loyal renewing customers more than new customers for equivalent cover) and require demonstrable fair value across policy lifecycle.
- ICOBS (Insurance Conduct of Business Sourcebook)
- The FCA Handbook section governing insurance distribution and conduct. Sets standards for product information, suitability, renewal communications, and complaints handling.
- Flood Re
- UK government-backed reinsurance scheme enabling insurers to offer affordable cover to homes in flood-risk areas. Eligibility limited to homes built before 1 January 2009. Excludes new-build property in flood zones (developers bear the risk).
- HHSRS (Housing Health and Safety Rating System)
- Statutory framework under the Housing Act 2004 used by local authorities to assess hazards in residential property. Category 1 hazards (severe) trigger enforcement duties. Damp and mould is a Category 1 hazard at significant severity.
- Decent Homes Standard
- Statutory standard for housing condition originally applied to social housing; extended to the private rented sector by the Renters' Rights Act 2025. Sets thresholds on property condition, tenant safety, hygiene, and heating/cooling adequacy.
Frequently asked questions
Landlord building insurance is a specialist form of buildings insurance designed for let property. The core covers are: buildings (the structure, fixed fittings, outbuildings — at rebuild cost); property owners' liability (third-party injury and damage claims); loss of rent (income loss where insured peril makes property uninhabitable); malicious damage by tenant (often as extension); legal expenses (possession proceedings, tenancy disputes). Standard home insurance is not designed for let property and most home insurers exclude tenanted occupancy — meaning a domestic policy on a let property may not respond to claims. See our high value residential landlords product page for full cover scope.
Phase 1 of the Renters' Rights Act commenced 1 May 2026, abolishing Section 21 no-fault evictions and converting all assured shorthold tenancies to assured periodic tenancies. The four insurance impacts at renewal: loss of rent indemnity periods of 12 months may no longer be enough given extended possession timelines (consider 18–24 months); rent guarantee insurance becomes materially more important; Property Owners' Liability becomes more important as tenant compensation routes strengthen; PRS Database registration and Decent Homes Standard compliance become disclosure-relevant. A policy taken out before May 2026 was rated on a risk profile that has now shifted — structured renewal review is the right response.
Four drivers, each contributing. First, UK property insurers paid out a record £6.1 billion in claims in 2025 — largely storms and flooding. Second, construction costs (the basis of claim severity) have risen approximately 15% across 2020–2025, with BCIS forecasting another 15–18% rise to 2030. Third, global reinsurance pricing hardened materially across 2022–2025 and is only slowly softening. Fourth, FCA fair-value reforms ended the cheap new-business discounts of the 2018–2021 market — premiums are now commercially priced from year one. Average single-property landlord building insurance premiums rose around 17% year-on-year in 2025–2026. A 17% increase against an unchanged risk reflects market conditions, not insurer behaviour against you specifically.
The average clause (or Condition of Average) is in virtually every UK buildings insurance policy. It reduces claims proportionally where the sum insured is less than the true value at risk. 30% underinsurance produces 30% claim reduction on every claim — not just total losses. The only way to avoid it is to insure at the correct rebuild cost. Get a current rebuild cost assessment (RICS surveyor for material/non-standard properties; BCIS-aligned online tool for standard residential); reassess every 3–5 years and after any extension/conversion; understand that index-linking adjusts your existing sum insured but cannot correct an originally inaccurate one. Approximately 70% of UK properties are underinsured — the most likely sum to be wrong is yours.
Market value includes land, location, demand, and supply factors. Rebuild cost is the cost of reconstructing the building from foundation up if destroyed — labour, materials, professional fees, demolition, debris removal, Building Regulations compliance. Land is excluded because land remains after a fire. For most UK properties, rebuild cost is 40–70% of market value. For inner London terraces, listed buildings, conservation areas, and properties with specialist construction (timber frame, stone, thatched), rebuild cost can exceed market value. Always insure at rebuild cost, not market value. Insuring at market value typically creates over-insurance (paying for more cover than you need) or — for high-cost rebuild properties — material underinsurance.
No statutory requirement, but practically essential. Buy-to-let mortgage lenders virtually always require buildings insurance as a mortgage condition — operating without cover is usually a mortgage breach with serious consequences. Leaseholders of flats are typically covered under the freeholder's block insurance (a different cover structure — see our block of flats specialist guide). HMO licences often require building insurance evidence. For mortgage-free properties, building insurance isn't legally required but rebuilding an uninsured property after fire or flood would be an uninsured loss — fundamental risk management even where not contractually required.
Yes. Landlord building insurance covers the structure of the property — the building you own. Tenant contents insurance covers the tenant's possessions inside the property. They are entirely separate covers. The tenant's contents policy provides no cover whatsoever for the building structure, the landlord's contents (if any furnishings are landlord-supplied), property owners' liability, or loss of rent. If you let property, you need landlord building insurance — your tenant's contents insurance does not substitute for it in any way.
Both, but in that order. The FCA fair-value rules prohibit insurers from charging renewing customers more than new customers for the equivalent cover — meaning renewal premiums are usually a fair benchmark. But premium-shopping alone misses the structural review that matters: rebuild cost accuracy, loss of rent indemnity, malicious damage scope, unoccupancy condition, disclosure of material changes. The best 2026 approach: engage a specialist broker who can both compare market terms (price) and review cover scope (structure) at the same time. Avoid the trap of switching to the cheapest comparison-site quote without reading the schedule — saving £30 to lose £40,000 to the average clause is not a saving.
Non-disclosure under the Insurance Act 2015. The pattern: landlord lets property as family let in year 1, converts to HMO in year 3, never tells the insurer because the renewal doesn't ask the question directly. Year 5, a claim occurs. Insurer's investigator identifies the HMO conversion, points to the original "what type of let" question on the proposal, and applies Insurance Act 2015 remedies — full avoidance (if breach was deliberate/reckless) or proportional remedy (if careless). It's never deliberate fraud; it's auto-renewal habits combined with property changes never being notified. The fix is structural: written disclosure exercise at every renewal, broker review, email confirmation of what's been declared. 30 minutes of work removes the catastrophic claim avoidance risk.
The legitimate levers in 2026: accurate (not inflated) rebuild cost — over-insurance is wasted premium; higher excess where you can absorb minor losses self-funded; documented security and fire safety provisions; documented maintenance, EICR, gas safety records; specialist broker placement particularly for HMO/blocks/listed/portfolio; 2+ year continuity with same insurer where claims-free; paying annually rather than monthly. The illegitimate "lever" — under-insuring at rebuild cost to save premium — creates catastrophic exposure to the average clause. Never reduce sum insured below true rebuild cost to save premium. For broader landlord cost dynamics see our commercial property insurance UK guide.
Partially, with limitations. Buildings insurance typically excludes damage caused by gradually-operating causes including chronic damp/mould — meaning the cost of remediating damp itself is usually not insured. Property Owners' Liability responds to tenant health claims arising from damp/mould exposure where landlord duty of care was inadequate. Loss of rent responds where remediation works render the property temporarily uninhabitable. Awaab's Law (for social housing from October 2025) and equivalent Renters' Rights Act provisions extending to PRS create statutory duties and tenant compensation routes. Operationally, the right response is a documented damp and mould protocol with rapid investigation and competent remediation — see our mould cleaning business insurance guide for contractor selection criteria.
Look for brokers with specific landlord experience evidenced by: specialist articles or guides on landlord, BTL, HMO, blocks, overseas, and high-value placements; willingness to discuss specific exposures (Renters' Rights Act risk shift, rebuild cost, average clause, Insurance Act disclosure) in detail; access to Lloyd's market and specialist MGAs rather than just mainstream commercial markets; FCA authorisation; track record with portfolio and complex property clients. Avoid brokers offering "landlord insurance" without discussing rebuild cost in detail; brokers who only quote from comparison panels; brokers who don't ask material change questions at renewal. Miller & Partner specialises in landlord and property placements — see our high value residential landlords page and broader property insights hub.
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