Central London flats, especially in mansion blocks with shared risers running behind several kitchens and bathrooms, tend to produce insurance claims that involve two policies, two sets of contractors and a loss adjuster who was not in the room when it happened. What you photograph, keep and write down in the first day decides whether that claim is straightforward or contested for months.
Mitigate first, but document as you go
Every household insurance policy places a duty on the policyholder to limit further damage once a leak is discovered — turning off the stopcock, isolating the affected circuit if water is near sockets, and getting an emergency plumber out promptly. That duty does not conflict with documenting the loss; it simply means you photograph and note things as you act, rather than waiting for a loss adjuster before you touch anything. Take wide shots of the room, close-ups of the source, and a photo of the stopcock or isolation valve you used, with the time. If you can do it safely, a short video walking the affected area is more useful than a dozen still photos, because it shows scale and context an adjuster cannot get any other way.
Buildings, contents and the freeholder's policy
In a purpose-built or converted block, a burst pipe rarely sits inside one policy. Buildings insurance — usually arranged by the freeholder or managing agent and recharged through the service charge — typically covers the structure, fixed pipework, ceilings, floors and permanent fixtures. Your own contents policy covers belongings, soft furnishings and, on many policies, alternative accommodation if the flat is unliveable. Where a leak has come from a shared riser or from the flat above rather than from within your own pipework, responsibility and the correct policy can be genuinely unclear at first — our guides to burst pipe repair in a mansion block and shared riser plumbing in mansion blocks set out how that responsibility is usually worked out, and it is worth reading before you assume the claim sits with your own insurer. If water has come through a ceiling from a flat above, our page on a bathroom leak affecting the flat below covers the practical steps between neighbours, which almost always run alongside the insurance conversation.
What a loss adjuster actually wants to see
Loss adjusters work from evidence, not from an account of how upsetting the morning was. The file that gets settled quickly usually contains:
- Photographs and video taken at the time, before repairs began, showing the source and the extent of the damage.
- Damaged items kept rather than binned, where practical — a section of failed pipe, a swollen skirting board, a sample of stained carpet — until the adjuster or their surveyor has had the chance to see them.
- An engineer's or plumber's report describing what actually failed and why, not just that a leak occurred.
- Invoices and receipts for the emergency call-out and any immediate protective work, kept separately from invoices for the full repair.
- A brief written timeline: when it was discovered, when the water was isolated, who was called and when they attended.
If the leak was hidden — behind tiling, under a floor, inside a wall — before-and-after evidence matters even more, because the adjuster is being asked to accept damage they cannot inspect directly once it is repaired. Our page on leak detection explains how a trace-and-locate survey works and why that survey report is itself useful evidence for a claim, since it records where the fault was found and how.
Why the cause of failure matters more than the damage
Most household policies cover "escape of water" as a specific insured event, but they distinguish between a genuine escape — a joint failing, a pipe splitting, a valve giving way — and gradual deterioration or wear and tear, which many policies exclude or limit. This is the single most common point of dispute in a burst pipe claim, and it is exactly why a plumber's report that states the cause plainly is worth asking for at the time of the emergency call-out, rather than weeks later when the pipework has already been replaced and the evidence is gone. If your flat was unoccupied for any stretch before the leak was found, check the policy's unoccupied-property clause too, since many policies impose extra conditions after a set number of consecutive days empty.
Excess, betterment and why the payout rarely covers "brand new"
Two practical points catch people out. First, the policy excess is deducted from whatever is agreed, and it applies per claim rather than per item. Second, insurers generally apply the principle of "betterment" — if a repair unavoidably leaves you with something newer or better than what was damaged (a whole floor re-laid because only part of it could be matched, for example), the insurer may deduct a contribution towards that improvement. Getting a written scope of works and an itemised quote before repairs begin, rather than a single lump sum afterwards, makes it far easier for both sides to agree what is fair.
Timing: notify early, repair promptly
Report the loss to your insurer (or ask your managing agent to report it, if it falls under the buildings policy) as soon as the leak is under control, not once the claim paperwork is fully assembled. Waiting for a loss adjuster's visit before doing anything is rarely required and often actively discouraged, since further damage from a leak left unrepaired can itself breach the duty to mitigate. Most insurers are content for urgent, protective work to proceed immediately provided it is documented, with the fuller reinstatement works agreed once the claim is open.
A short checklist for the day it happens
- Isolate the water (and power, if water is near a consumer unit or sockets) before doing anything else.
- Call an emergency plumber and note the time you called.
- Photograph and video the source and the damage before clean-up begins.
- Keep damaged items and materials rather than disposing of them immediately.
- Ask for a written report stating the cause of the failure, not just a description of the repair.
- Notify your insurer or managing agent the same day, and keep every invoice.
If you are dealing with a burst pipe right now, our team can attend, isolate the source and provide the written report your claim will need — start with our page on burst pipe emergency repairs or get an instant quote for the same-day call-out.