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Water-stained ceiling in a block of flats communal hallway after an escape of water claim on the building insurance

Block of Flats Insurance After Claims & Escape of Water

October 12, 2026

Published: 12 October 2026 | Reading time: 9 minutes | Category: Property | Author: John Miller, Miller & Partner

Last reviewed by John Miller, Director & Principal Broker — 12 October 2026
FS Register FRN 1029698 13+ years specialist commercial broking Lloyd's & specialist MGA market access Independent UK broker

A block of flats with a claims history, especially repeated escape of water, often faces a much higher excess, a premium loading or a refusal to renew. Escape of water is the most frequent claim in blocks: many flats share pipework, plumbing ages, and a leak in one flat damages the ones below. After a run of these claims, insurers typically raise the escape of water excess sharply, add conditions such as plumbing surveys, or decline to renew. The way back is to understand why the leaks are happening, fix the cause, and present that evidence to markets that will look past the claims figure. Freeholders, residents' management companies and managing agents should never let cover lapse while they look. Miller & Partner places blocks of flats with claims history and past refusals through Lloyd's syndicates and specialist MGAs.

Block renewal loaded or declined after claims? Send us the claims history and what's been fixed, and we'll test it with markets that write problem blocks.

Key facts at a glance

  1. Escape of water is the most common block claim, and the one most likely to change your terms.
  2. Insurers judge frequency more than size. Several small leaks worry them more than one large one.
  3. The usual response is a higher escape of water excess, sometimes several thousand pounds per claim.
  4. Who pays the excess depends on the leases, not on the insurer.
  5. Evidence of the cause being fixed is the strongest lever at renewal.
  6. Never let block cover lapse. Lenders, leaseholders and the leases all depend on it.

Why do blocks of flats have so many escape of water claims?

Blocks share pipework, risers and drainage across many homes, so one failure can affect several flats. Ageing plumbing, poor-quality fittings, leaseholders' own appliances and refurbishments all add to the risk, and leaks often go unnoticed in empty or rarely visited flats.
  • Shared and ageing pipework. Copper, lead or early plastic systems near the end of their life fail more often.
  • Leaseholders' appliances and fittings. Washing machine hoses, dishwashers and shower seals in individual flats cause many claims.
  • Poor workmanship in refurbishments. Push-fit connections and DIY bathroom fits are frequent culprits.
  • Unoccupied flats. A leak in an empty flat can run for days. See unoccupied property insurance.
  • Short lets and high turnover. Guests unfamiliar with a flat cause more leaks. See short lets in leasehold flats.

How do claims affect block insurance renewal?

Expect one or more of a higher escape of water excess, a premium loading, conditions such as a plumbing survey or leak detection, or a non-renewal. The more frequent the claims, the stronger the response, even if each one is small.
Claims patternTypical renewal responseWhat helps most
One escape of water claimLittle change, or a modest loadingEvidence the cause was repaired
Repeated escape of waterMuch higher escape of water excess, possible conditionsPlumbing survey, remedial works, leak detection
Escape of water plus trace and access costsSub-limits or exclusions on trace and accessAccessible risers, pipework mapping
Fire claimLoading, closer review of fire safetyUpdated fire risk assessment, completed actions
Malicious damage or vandalismLoading, security conditionsDoor entry, CCTV, lighting
Subsidence claimSubsidence excess increased or cover restrictedEngineer's report, monitoring, completed repairs

See our guides to subsidence history and insurance after a fire claim for those claim types.

Who pays the excess on a block of flats claim?

It depends on the leases. Often the excess is paid from the service charge, but some leases allow the freeholder to recover it from the leaseholder whose flat caused the damage. Check the lease wording before charging anyone, and apply it consistently.

When escape of water excesses rise sharply, how they are recovered becomes a real issue for leaseholders. Clear, consistent handling avoids disputes. Some managing agents pass the excess to the flat where the leak started where the lease permits, which also encourages leaseholders to maintain their own plumbing.

How can a block reduce escape of water claims?

Find the cause, fix it, and show the insurer you have. A plumbing survey of shared pipework, automatic leak detection and shut-off valves, and clear rules for leaseholders on appliances and refurbishments make the biggest difference at renewal.
  • Commission a plumbing survey of risers, tanks and shared pipework, and act on the findings.
  • Fit leak detection and automatic shut-off valves, at least in flats with a history of leaks.
  • Map stopcocks and isolation valves so leaks can be stopped quickly, with access arrangements agreed.
  • Set rules for leaseholders on appliance hoses, bathroom refits and using qualified tradespeople.
  • Inspect empty flats regularly, and consider draining down long-term vacant units.
  • Keep a claims log showing the cause and fix for each claim. It is the evidence underwriters need.

What if the insurer won't renew the block?

Arrange replacement cover before the renewal date and disclose the full claims history and the non-renewal. Specialist markets will consider blocks with escape of water history when the cause and the remedial work are evidenced. A lapse in cover is far worse than a high excess.

Start early. Problem blocks take longer to place, and underwriters want the claims log, the survey and evidence of works. Our guides to insurance cancelled by your insurer and insurance after a refusal cover the process.

This is where the Insurability Framework™ does its work: we turn the claims log, the survey and the works into one evidence-backed case, so underwriters judge the block on what has changed rather than on a claims total.

How do I get better terms for a block after claims?

  1. Build the claims log. Five years of claims with dates, causes, flats affected and amounts paid.
  2. Find the pattern. Same riser, same appliance type, same flat? The pattern tells you what to fix.
  3. Fix it and evidence it. Survey reports, invoices and photos of the works.
  4. Agree how excesses are recovered. In line with the leases, communicated to leaseholders.
  5. Go to market early. A specialist broker can present the full picture to the right underwriters before renewal.

Frequently asked questions

Usually because of repeated escape of water claims. Insurers raise the excess to share the cost of frequent leaks with the building. Evidence that the causes have been fixed is the best way to get it reduced.

Yes. Specialist markets write blocks with claims history when the claims, their causes and the remedial work are disclosed in full. Terms may include a higher excess or conditions at first.

It depends on the leases. Some allow the freeholder to recover the excess from the leaseholder whose flat caused the damage; otherwise it is usually paid through the service charge. Check the lease wording.

Many policies include trace and access cover for finding the source of a leak, sometimes with a sub-limit. After repeated claims, insurers may limit or exclude it, so check the wording at renewal.

They can help, especially alongside a plumbing survey and completed repairs. Some insurers make leak detection a condition for blocks with escape of water history.

Arrange replacement cover before the renewal date, and disclose the claims history and the non-renewal. Start early, because problem blocks take longer to place.

Yes, for the period the insurer asks about, typically three to five years. Missing claims give the insurer grounds to reduce a later claim or void the policy.

As long as insurers ask about them, usually three to five years. Terms often ease after two or three clean years, especially if the causes were fixed.

Related guides from Miller & Partner

Claims shouldn't define your block. Send us the history and the fixes once, and we'll put it in front of underwriters who look at what's changed.

John Miller, Director and Principal Broker at Miller & Partner, specialist broker for blocks of flats with claims history
Written and reviewed by John Miller Director & Principal Broker, Miller & Partner Over 13 years of specialist commercial insurance experience, formerly with Brown & Brown and AXA. Places hard-to-place property risks through Lloyd's syndicates and specialist MGAs, including blocks of flats with claims history, mixed-use buildings and commercial property.
Our regulatory status Miller & Partner Limited (FRN 1029698) is an Appointed Representative of Gauntlet Risk Management Ltd (FRN 308081), which is authorised and regulated by the Financial Conduct Authority. Miller & Partner Limited is registered in England and Wales (company number 16206282) and trades from Vivian House, Roman Bridge Close, Mumbles, Swansea SA3 5BG. This article is general information, not a personal recommendation or an offer of cover. Cover is subject to insurer acceptance and the full terms, conditions and exclusions of the policy issued.
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About this article General information, not advice. Published for general guidance and drawing on external sources as well as our own experience. It is not a personal recommendation, a quotation, or an offer of cover, and it doesn't take account of your circumstances. Read more + Close −

Where the information comes from

Our articles are compiled from a range of sources: regulators and public bodies such as the FCA, the Civil Aviation Authority, the Health and Safety Executive and Companies House; government publications and legislation; industry and trade bodies; insurer and market documentation; and published research and news reporting. Not everything stated originates from Miller & Partner. Where information comes from a third party we believe it to be accurate at the date of publication, but we haven't independently verified every external source and we don't warrant its accuracy or completeness. Where a point matters to a decision you're making, go to the original source and check it.

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Premium ranges, cost figures, limits and worked examples are illustrative only. They are not quotations, not offers of cover, and no cover is provided or implied on the basis of them. What you're actually charged depends on underwriting, and what you're actually covered for depends on the policy wording issued to you. Where an article includes a claim example, scenario or case study, it is illustrative unless we say otherwise — such examples are typically composites written to show how a policy section responds, and they don't describe an identifiable client, claim or settlement.

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Miller & Partner Ltd is an Appointed Representative of Gauntlet Risk Management Ltd, which is authorised and regulated by the Financial Conduct Authority (FRN 308081). Miller & Partner Ltd is entered on the FCA Register under reference 1029698. Registered in England and Wales, company number 16206282. Registered office: Vivian House, Roman Bridge Close, Mumbles, Swansea, SA3 5BG.

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Miller & Partner Ltd is an Appointed Representative of Gauntlet Risk Management Ltd, which is authorised and regulated by the Financial Conduct Authority (FRN 308081). Miller & Partner Ltd is entered on the Financial Services Register under firm reference number 1029698. You may check this on the Financial Services Register by visiting the FCA website at https://www.fca.org.uk/firms/financial-services-register or by contacting the FCA on 0800 111 6768. Miller & Partner Ltd is registered in England & Wales, company number 16206282. Registered office: 20 Vivian House, Roman Bridge Close, Swansea, SA3 5BG.