Flooding During Renovation Work in Poland — Who Is Liable, and How Do You Claim?

You come home mid-renovation to find a puddle of water on the floor — the crew wired up a tap or a washing machine badly, or damaged a pipe, then left for the weekend without dealing with it. Sometimes the consequences travel further: water seeps down a floor, into the neighbour's flat below. The short answer on liability: if the flooding was caused by the renovation crew, the crew is usually the one responsible — to you under your contract, and to the downstairs neighbour regardless of the fact that there is no contract between them — but how much and how quickly you're compensated comes down mainly to how fast you act and how well you document things. Below is a step-by-step guide: what to do in the first hour, how to report the damage, and who to claim against.

This guide is general legal information, not legal advice. How the rules apply depends on your individual circumstances, the wording of the contracts involved, the available documents, and the applicable time limits. If you need advice or representation, the matter should be assessed by a qualified Polish lawyer. Twoja Sprawa helps you organise the documents for that assessment.

Key points

• The first hour determines how bad the damage gets — shutting off the water and power in the flooded area comes before any documentation.
• Flooding of your own flat caused by the crew is usually a breach of contract — the contractor you hired is liable.
• Flooding of the neighbour downstairs rests on a different legal basis — the neighbour has no contract with the contractor, but can claim against them directly.
• Photos BEFORE you clean up matter more than getting the place dry quickly — without documentation it's hard to prove the extent of the damage.
• Notifying your insurer (and/or the contractor's) and notifying the contractor should happen in parallel, not one after the other.
• Establishing the cause of the flooding — a fitting error, a faulty part, or an unrelated failure — decides who ultimately pays.

The first hour after a flood — what to do immediately

Before you even think about liability and compensation, limit the damage:

1. Shut off the water supply — the main stopcock, or the valve nearest the leak if you know where it's coming from.
2. Switch off the power to the flooded area (the relevant circuit breaker) if water has reached the electrics — for safety, not just for evidence.
3. Take photos and video before you start cleaning up — the source of the leak, how far the water spread, damaged fittings, water level if visible.
4. Contain the spread (towels, buckets), but don't destroy evidence — e.g. don't immediately dismantle the damaged fitting.
5. Warn the neighbour downstairs if the flood may be seeping through — the sooner they know, the less damage they suffer and the less conflict later.
6. Contact the building manager, residents' association (wspólnota mieszkaniowa) or housing co-operative (spółdzielnia mieszkaniowa), if you live in a multi-occupancy building — they sometimes coordinate the report and draw up an official record.
7. Call the contractor and ask them to come out immediately — ideally the same day, so the cause can be established while it's fresh.
8. Note who was on site and at what time — this helps later when you're reconstructing the timeline.

Who is liable — the contractor, you, or the insurer

Liability for flooding depends on whose property is damaged and what caused it:

• Flooding of your own flat. If it was caused by the renovation crew — e.g. a badly connected pipe, a fitting damaged during the works — this is generally treated as defective performance of the contract: the contractor is obliged to compensate for the resulting damage. This is a contractual claim — you have a contract with the contractor, so you claim against them directly.
• Flooding of the flat below (the neighbour's). Here there is no contract between the neighbour and the contractor, so the claim rests on tort liability (liability for an unlawful act) — the neighbour can claim directly against the contractor as the party who caused the damage. We cover this mechanism in more depth in our guide on damage caused to neighbours during renovation (linked at the end).
• Flooding unrelated to the renovation — e.g. a failure in an old installation, unconnected to the crew's work — here the contractor's liability may not apply at all, and the matter becomes one for your ordinary home insurance, or for the building manager's liability over shared installations. Establishing the cause is key here.

As with neighbour-damage cases more broadly: your claim against the contractor for flooding your own flat is a contractual matter, where it matters whether you're acting as a consumer (renovating your own home) or as a business (renovation connected with a trade or business) — this affects the scope of protection you get. The downstairs neighbour's claim against the contractor, on the other hand, rests on tort provisions that apply regardless of either party's status.

Reporting the damage to insurers

With flooding, it's worth thinking about several policies in parallel — they don't rule each other out:

• Your own home contents/buildings insurance (if you have it) — usually the fastest route to covering losses in your own flat, regardless of who is ultimately at fault; your insurer can later recover the cost from whoever caused it, through subrogation.
• The contractor's public/professional liability insurance (OC) — if the contractor holds a business liability policy, that's what you claim against for damage caused both to you and to the neighbour. This is, in practice, the single most important policy in cases like this — always ask about it before signing the contract.
• The building's insurance (residents' association/housing co-operative) — may cover shared parts of the building, e.g. if structural elements or the stairwell were flooded, but usually won't cover damage to fixtures inside your or your neighbour's flat.
• The downstairs neighbour's own insurance — if the neighbour has home insurance, they can claim on it directly, and their insurer will then pursue the party responsible via subrogation — this is often the quickest route for the neighbour themselves, since it doesn't depend on establishing fault upfront.

Claims to different policies can be pursued in parallel — you don't need to wait for one to finish before reporting to another.

Documenting the damage — exactly what to collect

The more you document straight away, the easier the settlement:

• Photos and video clearly showing the extent of the flooding, the source of the leak, and the damaged items — taken before any cleaning or drying.
• A flood report — if the building has a manager or co-operative, ask them to draw one up; if not, write one up yourselves together with the contractor and/or neighbour, with a date, description and signatures.
• An expert opinion on the cause (plumber or other specialist) — especially important if the contractor disputes liability or claims the cause was unrelated to their work.
• A repair estimate — ideally from an independent firm, covering both visible damage (flooring, ceilings, furniture) and damage that may only appear later, e.g. damp under laminate flooring or mould.
• Correspondence with the contractor — the initial report, their response, and any admission of fault or refusal to accept it.
• Confirmation of the reports made to insurers — claim numbers, dates, and correspondence.

Claiming from the contractor vs claiming on their liability insurance — which route to take

In practice both routes can lead to the same outcome, but they play out differently:

• Claiming on the contractor's liability insurance tends to be faster and less confrontational — the insurer assesses the damage and pays out according to the policy terms, without needing to go to court. It does, however, require the contractor to actually hold a valid policy and to report the incident (or for you, with their consent or directly as the injured party, to be able to do so).
• Claiming directly from the contractor (a formal demand for payment, and, if refused, court proceedings) becomes necessary if the contractor has no policy, the insurer refuses to pay or disputes liability, or the damage exceeds the policy limit.
• Good practice: notify the contractor of the damage at the same time, in writing, and ask for their liability insurance details — this doesn't rule out pursuing a claim directly against them in parallel if the insurance doesn't cover everything.

Documents and evidence to gather

Common mistakes

• Cleaning and drying before taking photos — the most common mistake, and one that makes it hard to later prove the extent of the damage.
• Delaying notification of the neighbour downstairs — the later they find out, the bigger the damage and the bigger the conflict.
• Reporting to only one party (e.g. only your own insurer, without informing the contractor) — wastes time when you could be acting in parallel.
• Verbal agreements with the contractor about repairs, without written confirmation — a month later, no one remembers exactly what was agreed.
• No independent opinion on the cause, when the contractor disputes fault — without one, it's hard to get past a "he said, she said" dispute.
• Rushing the repair without a cost estimate — makes it harder to prove the real value of the damage to an insurer or the contractor.

Step-by-step action plan

1. Limit the damage — shut off the water, and the power if needed, in the flooded area.
2. Document the flooding with photos and video before you start cleaning up.
3. Notify the downstairs neighbour and the building manager, if applicable — ask for a flood report.
4. Notify the contractor in writing (an email or text is enough) and ask for their liability insurance details.
5. Report the damage to the relevant insurers — yours, the contractor's, possibly the neighbour's — in parallel, not one after another.
6. Commission an opinion on the cause of the flooding, if the contractor disputes liability.
7. Get a repair cost estimate from an independent firm before deciding to go ahead with repairs.
8. If the matter stalls, send a written formal demand for payment with a deadline, and consider getting legal advice.

Time limits and limitation periods

Time limits vary depending on who suffered the damage and what the claim is based on:

• Your claim against the contractor for flooding your own flat rests on defective performance of the contract — if the contract is classified as a "specific-task contract" (umowa o dzieło), the limitation period is generally 2 years from completion of the work. Under a different contract classification, the general limitation periods may apply instead — 6 years, or 3 years where the claim relates to a business activity.
• The neighbour's claim against the contractor for flooding their flat is based on tort and generally becomes time-barred 3 years after the injured party learned of the damage and of who is liable for it, and in any event no later than 10 years after the event.
• Insurance claims have their own contractual deadlines, often just a few days for the initial report — always check the general terms and conditions (OWU) of the relevant policy, as these are separate from the civil-law limitation periods.

Even though the limitation periods themselves are relatively long, when it comes to flooding, time matters on a completely different scale — the faster you establish the cause and document the damage, the easier it is to get full compensation and the lower the risk of secondary damage such as damp or mould.

Frequently asked questions

Who pays for drying out a flat after the renovation crew caused a flood? As a rule, the cost of drying out and repairing damage caused by flooding falls on whoever was responsible for causing it — if it was the crew's error, that's the contractor, either directly or through their liability insurance. In practice, you often cover the costs first from your own home insurance, because it's faster, and your insurer then settles up with the contractor afterwards.

Do I have to wait for the contractor's go-ahead before drying the place out? No — limiting the damage (drying out, hiring dehumidifiers) should start straight away, so you don't end up with further losses like mould or structural damage. Just make sure you've documented the flooding with photos before you start.

What if the contractor claims the flooding had nothing to do with their work? Then an independent opinion from a plumber or expert becomes essential — they can assess whether the failure resulted from the renovation work or from an earlier, unrelated cause, such as an old, corroded pipe. Without that opinion, it's hard to get past the dispute.

The downstairs neighbour is threatening to sue me — am I liable, given it was my crew that caused the flood? The neighbour can formally claim against both of you — you and the contractor — but if you hired a professional building firm, it's usually the contractor who is liable for damage caused while carrying out the work, not you. It's worth passing the neighbour the contractor's details and their liability insurance information straight away.

Is it worth reporting a minor flood if the damage looks small? Yes — damp can reveal its effects weeks later, such as mould or warped flooring, and without documentation from the day of the event, it's hard to later link those effects back to a specific flood. It's better to report and document even minor damage right away.

Legal basis

This material refers to provisions of the Polish Civil Code on defective performance of an obligation, liability for unlawful acts (tort), and liability for persons entrusted with carrying out a task — including Articles 415, 429, 430, 442¹, 471, 646 and 118 of the Act of 23 April 1964 – Civil Code (consolidated text: Dz.U. 2026 poz. 795) (in Polish). The "" markers flag statements whose current wording and application to a specific set of facts should be confirmed by a lawyer before publication, including the rules on claiming under liability insurance policies, which additionally depend on the general terms and conditions of the specific insurer.

Related guides

• Damage Caused to Neighbours During Renovation or Building Work — Who Is Liable? — a broader look at liability towards neighbours for damage other than flooding.
• Liability of the Site Manager, Designer and Subcontractor for Defects — for cases involving several firms on one building project.
• Contractor Refuses to Fix Defects — How to Draft a Formal Demand for Payment — when a contractor refuses to put things right amicably.
• All guides on disputes with businesses — the full knowledge base on this topic.

Did a renovation crew flood your flat, or your neighbour's? Send us photos of the damage, the flood report and the contractor's details — we'll help you organise the documents for further assessment. Submitting the form does not create a contract and does not commit you to anything.