Contract With a Polish Renovation Crew: What It Should Cover

Planning a renovation in Poland and want to avoid ending up like the people who, months into a dispute, are digging through text messages for proof of what was agreed? A well-drafted contract with your building crew is the cheapest insurance you'll ever buy — it costs an hour of your time before work starts, and it can save you months of stress afterwards. This guide walks through what a contract needs to actually protect you: scope of works, schedule, staged payments, penalty clauses and sign-off procedures.

This guide is general legal information, not legal advice. How the rules apply depends on your individual circumstances, the wording of your contracts, your documents and the applicable deadlines. 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

• A renovation contract doesn't have to be in writing to be legally valid — but a written contract is your main piece of evidence if things go wrong.
• The essential elements are: a precise scope of works (ideally as an annex), a schedule, payment terms and staged instalments, sign-off procedures, and penalty clauses for delay.
• A zadatek (earnest-money deposit) and a zaliczka (advance payment) are not the same thing — the difference matters if the contract falls through.
• Don't pay a large sum upfront. Tying payments to completed stages of work is your strongest leverage over the contractor.
• Confirm every change to scope or price in writing (via an annex) or at the very least by email or text message.
• Before signing, check out the contractor: company details, tax number (NIP), reviews, and whether the business is actually active.

Why a written contract matters so much

Polish law doesn't require a renovation contract (usually a umowa o dzieło — contract for specific work, or, for larger jobs, a umowa o roboty budowlane — construction works contract) to be in writing. A verbal agreement is legally binding too. The problem starts when the parties disagree about what was actually promised, for how much, and by when. Without a document, a court is left with two conflicting accounts — and that's a hard case to win on the evidence. If your renovation has already started, or finished, without a written contract, see our separate guide on pursuing a claim without a written agreement (linked below) — this article is about how not to end up in that position in the first place.

Before you sign — vet the contractor

The contract must list full details for both parties. While you're gathering them, run a simple check:

• Sole trader: first name, surname, business name, NIP (tax number), address — check in CEIDG (the free Polish register of sole traders) that the business is still active.
• Limited company: full company name, KRS (National Court Register) number, NIP, registered office — check the KRS search tool to confirm the person signing can actually represent the company.
• Reviews and past work: ask for references from previous clients or photos of completed jobs.
• Public liability insurance (OC): ask whether the business carries public liability cover. If a pipe bursts and floods a neighbour, or an installation gets damaged, this is often the only realistic source of compensation.

If a contractor avoids giving you their NIP, refuses a written contract, or insists on cash only with no receipt — treat that as a warning sign.

Contract checklist

Scope of works and materials — the heart of the contract

Most renovation disputes trace back to vague wording like "full bathroom renovation." Instead:

• Describe the works item by item — ideally as a signed annex to the contract (a cost estimate or room-by-room list of tasks), signed by both parties.
• Specify the standard of work: which tiles (make/model, or "supplied by the client"), how many coats of paint, and so on.
• Agree who buys the materials. A typical model: you buy the finishing materials, the contractor supplies the basic building materials (adhesives, plaster). If the contractor is buying, note that they must provide invoices and that materials must match the agreed standard.
• Record who disposes of the rubble, and at whose cost.

Fixed price vs cost-based fee — explained simply

• Fixed price (ryczałt) means one flat fee for the whole job. Advantage: you know the total cost upfront, and as a rule the contractor cannot demand more even if they underestimated the workload (art. 632 of the Polish Civil Code). Downside: contractors tend to price in a safety margin.
• Cost-based fee (wynagrodzenie kosztorysowe) means billing according to an itemised estimate of planned works and prices; the final figure can shift depending on what was actually done (art. 629–631 of the Polish Civil Code). Advantage: you pay for what was genuinely carried out. Downside: less predictable final cost.

For a typical flat renovation, most people choose the fixed price option precisely to stop the cost "creeping up" mid-project. If a contractor later demands extra payment above the agreed price, we cover that in a separate guide (linked below).

Staged payments, advances and deposits

Don't pay a large share of the fee upfront. A sensible structure: a small payment at the start (to cover materials), further instalments as each stage is signed off, and a final 10–20% paid only after final sign-off and any snagging is resolved. That last instalment is your strongest card — as long as it's unpaid, the contractor has every reason to finish the job properly and fix any issues.

Two terms often get confused:

• Zaliczka (advance payment) — a sum paid on account of the price; if the contract falls through, it is generally refundable.
• Zadatek (earnest-money deposit) — this secures performance of the contract: whichever party fails to perform loses the deposit, or must repay it doubled (art. 394 of the Polish Civil Code).

Name the payment explicitly in the contract and spell out its consequences — this heads off a lot of later disputes. What to do if a contractor takes an advance and then vanishes is covered in our related guide.

Deadlines, penalty clauses and sign-off

• Deadlines: record the start and completion dates, and for a bigger job, a stage-by-stage schedule. Without a concrete date, it's hard to even argue there's been a delay.
• Penalty clauses: a typical clause charges a fixed amount (often a fraction of a per cent of the fee) for each day of delay, usually capped at a maximum. The advantage: you don't have to prove the size of your loss — showing the delay is enough (art. 483–484 of the Polish Civil Code). It's worth also adding a right to terminate the contract in the event of serious delay.
• Partial sign-offs: after each stage, draw up a short hand-over record (protokół odbioru) — what was done, any objections, signatures, dates and photos as an attachment. A partial sign-off catches defects before they're covered up (e.g. pipework behind tiling).
• Final sign-off: state that the last instalment is payable only once the work has been signed off with no material defects, or once any snags on a list have been fixed. Signing a final record "with no reservations" makes it much harder to later raise defects that were already visible — so note down anything that concerns you before you sign.

Statutory warranty, guarantee and changes mid-project

• Statutory warranty (rękojmia) is the contractor's liability for defects arising by operation of law — it exists even without a clause in the contract (art. 638 of the Polish Civil Code, applying the provisions on statutory warranty for sale mutatis mutandis). If you're a consumer (renovating your own home, with the contractor acting as a business), your position is generally stronger than in a business-to-business relationship, where some of these rights can be limited by contract (art. 558 in conjunction with art. 638 of the Polish Civil Code).
• A guarantee (gwarancja) is voluntary — the contractor may offer one in the contract (e.g. 24 months on completed works). Record what it covers, how long it lasts, and the timeframe for fixing defects.
• Changes to scope: record that any additional works or price changes require an annex, or at minimum confirmation in a documented form (email, text message). This stops "extra work" charges appearing out of nowhere.
• Ending the contract: describe when each party may withdraw from or terminate the contract (serious delay, abandonment of the site, non-payment) and how work already completed is to be settled.

Common mistakes

• A handshake deal plus bank transfers with no description. When a dispute arises, you have nothing but your own version of events.
• A large upfront payment. Paying 50–70% before work even starts hands away all your negotiating leverage.
• A vague scope of works. "Full renovation" means something different to everyone — a dispute over extra charges is close to guaranteed.
• No dates and no penalty clause for delay. Without a deadline in the contract, a renovation can run "until it's done."
• Changes agreed verbally as you go. After the job's finished, nobody remembers who agreed to what — confirm every change by email, text, or annex.
• Signing the final sign-off with no comments despite visible defects — note your objections on the record before you sign.

Step by step

1. Vet the contractor — CEIDG/KRS, NIP, reviews, past work, public liability cover.
2. Write up the scope of works and material standards — as an annex or cost estimate to the contract.
3. Agree the fee structure (fixed price or cost-based) and a payment schedule tied to stages.
4. Name the upfront payment explicitly (advance or deposit) and set out its consequences.
5. Add deadlines, penalty clauses, sign-off procedures and the warranty/guarantee terms.
6. Sign the contract in two copies — one for each party — with annexes initialled.
7. Document as you go: partial sign-off records, photos, written confirmation of any changes, bank transfers with a description of the stage they cover.
8. Final sign-off with a written record — a snagging list, a deadline for fixing it, and the last payment released only once it's done.

Deadlines and limitation periods

A well-drafted contract doesn't override the general statutory time limits — worth knowing before you sign:

• Claims under a umowa o dzieło (contract for specific work) generally become time-barred 2 years after the work was handed over (or, if it never was, from the date it should have been) (art. 646 of the Polish Civil Code).
• For a umowa o roboty budowlane (construction works contract), the general limitation periods apply (art. 118 of the Polish Civil Code — 6 years, or 3 years for claims connected with a business activity).
• Statutory warranty and guarantee rights have their own separate time limits — record the guarantee period explicitly in the contract, and confirm the statutory warranty time limits with a lawyer.

Whether a contract counts as umowa o dzieło or umowa o roboty budowlane can itself be disputed, and it affects the time limits that apply — for larger projects, it's worth getting individual advice on this point.

Frequently asked questions

Does a contract with a Polish renovation crew have to be in writing? No — a verbal agreement is legally valid too. But a written contract is your main piece of evidence in a dispute: without one, it's hard to show what was actually agreed on scope, price and timing. For a renovation costing tens of thousands of złoty, putting it in writing is the bare minimum.

Fixed price or cost-based fee — which is better for the client? For a typical flat renovation, a fixed price is usually the safer choice: you know the cost upfront, and as a rule the contractor cannot unilaterally raise it. A cost-based fee can be fairer for work that's hard to estimate in advance, but it requires you to keep a close eye on the running total.

How much should I pay upfront to a renovation crew? There's no fixed legal rule, but the practical guideline is: as little as possible — just enough to cover the real start-up costs — with the rest split into instalments tied to sign-off stages. Holding back the final 10–20% until final sign-off and snagging gives you the best protection.

What's the difference between an advance (zaliczka) and a deposit (zadatek) on a renovation? An advance is a payment on account of the price — if the contract isn't performed, it's generally refundable. A deposit acts as a security: the party who fails to perform the contract can lose it (or must repay it doubled) (art. 394 of the Polish Civil Code). Name the payment explicitly in the contract and set out the consequences.

Are penalty clauses in a Polish renovation contract legal? Yes — a penalty clause for failure to perform, or defective performance of, a non-monetary obligation (such as a delay in the works) is a standard and permissible clause (art. 483 of the Polish Civil Code). A grossly excessive penalty can be reduced by a court (so-called miarkowanie), so it's better to set a rate that's reasonable but still has some bite.

What should I do if the contractor wants to change something mid-renovation? Changes are normal — the problem is when they're not documented. Confirm every change to scope or price by annex, or at minimum by email or text ("Confirming: additional skimming in the hallway, +1,500 PLN, no change to the deadline — agreed?"). The contractor's reply closes off the issue and protects both sides.

Related guides

• Renovation work with no written contract — can you still make a claim?
• Builder took a deposit and abandoned the renovation — what can you do?
• Building contractor did a bad job — how to start a defects claim
• Builder demanding extra payment above the agreed price — what Polish law says
• All guides on disputes with businesses

Already have a draft contract from your contractor, or just an exchange of emails and texts? Send them to us — we'll organise the documents and point out what's missing before you sign. Submit your contract for an initial review — sending the form doesn't create a contract, and the initial assessment is free.

Content reviewed: 10 July 2026.