The answer depends on your lease, the source of the water, and whether anyone was at fault. Here's how to work it out.
Information only. Not legal advice. Always take professional advice before acting.
Most people assume the person whose flat the water comes from is responsible. Sometimes they are, especially if they caused it through negligence or unauthorised work. But often the answer depends on your lease boundaries, the building insurance terms, and the physical source of the water.
Whether the water comes from a flat above, a shared riser, or the roof changes who is responsible. Your lease defines what's yours and what's the freeholder's through the demiseThe "demise" is the part of the building your lease grants you possession of. It typically includes the interior surfaces of your flat but excludes the main structure, roof, and shared services. Boundaries vary between leases..
Building insurance may cover the damage, but your lease may also contain clauses about who bears the excess or uninsured costs. You need to check both documents.
Most leases define what's "demised" to you versus "retained" by the landlordCommon patterns: the flat interior (plaster, floor coverings, internal pipes) is usually demised. The main structure, roof, external walls, and shared risers are usually retained by the landlord. But there is no standard and each lease is different.. This boundary, which varies from lease to lease, can affect who is responsible for maintaining and repairing different parts of the building.
If a leaseholder carries out plumbing work without consent and damages a pipe, they can be personally liable under common law negligenceUnder English tort law, a leaseholder owes a duty of care to avoid damaging neighbouring properties through their actions. Unauthorised alterations that cause water damage create direct personal liability, regardless of lease boundaries. The Defective Premises Act 1972 may also apply.. Lease boundaries do not shield a leaseholder from liability for damage they caused through their own fault.
Escape of water is one of the most frequent causes of insurance claims in residential blocks. Disagreements about who pays can take months to resolve if the lease clauses aren't clear from the start.
Five steps to pinpoint liability. Do them in order. Or upload your lease and ask LEASE-iQ.
Is water coming from the flat above, a shared riser pipe, the roof, or an external wall? The physical source determines the legal liability path. Take photographs and note the damage location.
Your lease should define what's demised to each leaseholder versus retained by the freeholder. This boundary varies between leases - check yours carefully, as it affects who is responsible for pipes, walls, and structure.
Get a copy from your managing agent. Does it cover "escape of water"The standard insurance term for water damage caused by leaks, burst pipes, or overflowing tanks. Most buildings insurance policies cover this, but the excess (the amount you pay before the insurer pays) varies widely and has been rising in recent years.? What is the excess? Who pays the excess: the individual unit, or is it charged back to all leaseholders?
Some leases contain clauses about how the insurance excess is allocatedThere is no default legal rule on who pays the excess. Some leases charge it to the leaseholder who caused or reported the claim. Others spread it across all leaseholders via the service charge. Some are silent, which creates disputes. LEASE-iQ can check what your specific lease says.. For example, whether it falls on a specific leaseholder or is spread across all leaseholders via the service charge. Not all leases cover this, but where they do, it matters.
Take photographs, note dates, and keep copies of all communication. Your lease may contain clauses about access to other flats for inspection or repair. Your managing agent and insurer will need a clear timeline.
⚠️ Important: Water leak disputes can take months to resolve. If you believe costs are being allocated incorrectly, having the specific clause references from your lease strengthens your position. Always seek professional advice before taking action.
Upload your lease. Copy this prompt:
The free LEASE-iQ analysis told you who's responsible. Now you need to get them to act. Here's how to handle the conversation, what pushback to expect, and how to get an urgent letter drafted if you need one.
The free analysis established who's responsible. Now tell LEASE-iQ where the leak is and what damage has occurred, and it will generate an urgent formal notice requiring immediate action. Every day of delay is more damage and more cost.
Based on your lease analysis, LEASE-iQ will generate:
The Leasehold Advisory Service (LEASE) provides free, independent advice on repair disputes and water leak liability. If the freeholder won't act, LEASE can help you understand your options, including applying to the First-tier TribunalThe First-tier Tribunal (Property Chamber) determines disputes about service charges, repairs, lease extensions, and other leasehold matters. Leaseholders can apply without a solicitor. gov.uk.
Contact LEASE (free) →Escape of waterThe insurance industry term for water damage from leaking, burst, or overflowing pipes, tanks, and appliances. It accounts for roughly 28% of all household insurance claims in the UK and costs insurers an estimated £1.8 million per day in payouts. is the single biggest driver of building insurance claims. In leasehold buildings, every claim pushes up the service charge for everyone.
Repeated claims can lead insurers to impose higher excesses or exclude water damage entirely - leaving the building uninsured for its most common risk.
If you're a director of an RTM, SoF, or management company, a water leak isn't just a personal problem - it's a management one. You may need to coordinate between leaseholders, the insurer, and the managing agent.
Does the building insurance cover escape of water? Who submits the claim - the affected leaseholder or the managing agent?
Check your lease for clauses on how the excess is allocated. This can vary between buildings and may need a board decision.
You may need to facilitate access between flats for investigation. Document all steps and communications carefully.
Repair costs may need to be recovered through the service chargeLTA 1985, s.18. Service charges must be reasonable and for costs properly incurred. If you charge repair costs through the service charge, leaseholders have the right to challenge them at the First-tier Tribunal.. Check what your lease permits before committing expenditure.
BLOCK-iQ helps directors track insurance renewals, maintain compliance records, and manage building obligations in one place.
See how BLOCK-iQ works →Upload your lease (any age, any format). Ask a question in plain English. Get a clause-cited answer in seconds - not hours of reading.
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