Water damage from a neighbour's leak: who is responsible and what to do first

What to do the moment you notice damage

If water is actively coming through — dripping, running, or pooling — the first job is to stop it getting worse, not to work out whose fault it is. Move furniture and electronics away from the wet area, put a bucket or towels down, and switch off the electricity supply to that room at the fuse board if water is anywhere near sockets or light fittings.

If you can safely reach the flat above, knock on the door straight away. Most leaks come from a burst supply pipe, an overflowing washing machine, or a bath left running, and the neighbour may not even know it is happening. Stopping the source is worth more in the first ten minutes than any amount of paperwork afterwards.

• Move valuables and electrics away from the wet area
• Switch off power to the affected room if water is near sockets or fittings
• Knock on the neighbour's door or call them immediately
• Place buckets or towels to limit spread, but do not start repairs yet

Who to notify, and in what order

Once the immediate danger is under control, tell the neighbour directly if you have not already, then notify your apartment association (korteriühistu) or its manager the same day. In an association, the property manager often has a standard process for exactly this situation and may already have the neighbour's contact details and insurance information on file.

If the leak seems to be coming from a shared pipe or riser rather than something inside the neighbour's flat — for instance a stack pipe behind a wall — the association needs to know quickly, because that is their responsibility to investigate and fix, not a private matter between two flats. Your own home insurer, if you have contents or building cover, should also be told within the first day or two even if you are unsure yet whether you will claim.

How to document the damage properly

Photograph everything before you touch or clean anything: the ceiling or wall from a distance and close up, any pooling water, the meter or stopcock if relevant, and the source of the leak if you can see it. Take photos with a timestamp, either from your phone's default camera roll or by including a dated newspaper or note in one shot if you want to be thorough.

Keep a short written note of what happened and when: the time you noticed it, when you contacted the neighbour, when the association was told, and when the leak stopped. This does not need to be formal — a message to yourself or an email to the association creates a timeline that is far more useful later than memory alone.

If the neighbour or a plumber attends and identifies the cause, ask them to confirm it in writing, even a text message. A specific cause found early — a split flexible hose, a failed washing machine seal, a corroded joint — is much easier to act on than a vague description weeks later.

What is genuinely dangerous and what can wait

Water near live electrics is the one thing that cannot wait: if a ceiling light fitting is wet or dripping, or water has reached a socket, cut power to that circuit and leave any repair to a qualified electrician rather than checking it yourself. A ceiling that has visibly sagged or bulged with trapped water is also urgent, since it can collapse without much warning, and the safest thing is to keep people and furniture clear of it rather than push it or pierce it.

By contrast, surface staining, a small patch of damp plaster, or peeling paint is unpleasant but not urgent — it can be assessed and repaired over the following days once the leak itself is fixed. Drying out properly matters more than fixing it fast: repainting over damp plaster before it has dried tends to fail and need doing again.

When to get a repair quote before insurance is settled

You do not need to wait for a liability decision to get a repair quote — in fact getting one early is useful, because it gives every party a concrete figure to discuss rather than a guess. A written quote also becomes part of your documentation, showing what the damage actually cost to put right.

For a ceiling stain or a small area of damaged plaster, an odd-jobs visit from 39 € an hour is usually enough to assess and quote the repair. Where the leak has affected flooring, several walls, or built-in fittings, a flat renovation quote from 180 € per job gives a fixed figure valid for 30 days, which is easier to present to an insurer or a neighbour than an hourly estimate.

If the cause of the leak is still unclear — a persistent damp patch with no obvious source — it is worth having a plumber look at the pipework first, from 45 € an hour, before any decorative repair goes ahead. Repairing plaster over a leak that has not actually stopped is money spent twice.

How liability is usually worked out in practice

In most cases, whoever caused the leak is expected to cover the cost of the damage it caused to your flat, whether that is the neighbour directly or their home insurance. Where the fault lies in a shared pipe rather than something inside a private flat, the association is usually the party responsible for arranging and often paying for the fix, since shared pipework is common property.

Insurers on both sides — yours and the neighbour's — will often want their own assessment before agreeing to pay, which is exactly why early documentation and a written quote help: they give the insurer something concrete rather than a dispute over recollection. If the neighbour is uninsured or responsibility is disputed, this becomes a civil matter between the parties, and for anything beyond a straightforward disagreement it is worth getting advice from a lawyer rather than trying to resolve it alone.