Flat Smaller Than Contracted by a Polish Developer? Your Options

Bought a flat "off-plan" in Poland at a stated floor area, only to find after the final measurement (pomiar powykonawczy — the post-construction survey) that the flat is smaller than the contract promised? This is one of the more common sources of disputes with Polish developers — especially where the contract contains a floor-area "tolerance" clause that buyers often only discover at handover stage. This guide explains where the discrepancy typically comes from and what options you may have when the final floor area doesn't match what you were promised.

This guide is general legal information, not legal advice. We do not guarantee any outcome — whether, and to what extent, you're entitled to a price reduction or to withdraw from the contract depends on the wording of your specific umowa deweloperska (developer contract), the measurement documentation, and the facts of your case. Where advice or representation is needed, the matter should be assessed by a qualified Polish lawyer. Twoja Sprawa helps you organise the documentation for that assessment.

Key points

The discrepancy usually only comes to light at final measurement — that is, once construction is finished and the actual floor area of the flat turns out to differ from the figure stated in the developer contract and the prospekt informacyjny (statutory pre-sale information prospectus).
Many developer contracts contain a "floor-area tolerance" clause permitting a small deviation with no financial consequences — its exact wording and percentage threshold depend entirely on the individual contract (there is no single statutory tolerance threshold confirmed here — this needs a lawyer's review of the specific contract).
Where the discrepancy exceeds the contractual tolerance threshold, you may have grounds to seek a price reduction — but the precise mechanism and conditions for such a claim require assessment of the specific contract and of the statutory warranty (rękojmia) rules.
For a very large discrepancy, withdrawal from the contract can in theory also be considered, but this is a more far-reaching remedy than a price reduction and requires careful legal assessment.
A floor-area tolerance clause is sometimes challenged as a potentially unfair contract term, particularly where it is drafted one-sidedly in the developer's favour — whether a specific clause in your contract actually has that character is a matter for a lawyer to assess.
Documentation is key: the developer contract, the information prospectus, the unit design/layout, the final measurement report, and any correspondence with the developer.

Where the floor-area discrepancy comes from

The floor area quoted at the sales stage (in the developer contract and the information prospectus) is based on the building design — that is, on the designed area, not yet the area as actually built. Once construction is complete, a final measurement (pomiar powykonawczy) of the unit is carried out, and it is this figure that becomes the definitive floor area recorded in the akt notarialny (notarial deed) transferring ownership.

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Discrepancies between the designed and as-built floor area can arise from, among other things, normal construction tolerances in wall thickness and finishing, differences in how the area is measured (e.g. how plaster or wall-covering thickness is accounted for), or design or construction errors that only become apparent once the works are finished. Which measurement standard applies to your unit should be stated in the contract itself — it's worth checking this before comparing the final measurement figure against the contracted floor area (the specific measurement standard referenced in a given contract needs to be checked case by case — there is no single universal standard confirmed here).

Floor-area tolerance clauses in developer contracts — what to check

Many Polish developer contracts include a clause allowing the floor area to deviate by a certain percentage (or number of square metres) without giving the buyer any claim, with a price-adjustment mechanism only kicking in above that threshold. When reviewing such a clause, check:

What exact tolerance threshold the contract sets — expressed as a percentage (e.g. a fraction of the total area) or in square metres.
Whether the threshold works symmetrically — does it apply equally where the flat turns out smaller or larger than contracted, with the same adjustment mechanism in both directions?
How the contract describes the settlement mechanism above the threshold — is it a proportionate refund of part of the price relative to the missing area, or something else?
Whether the contract addresses this at all — the absence of such a clause doesn't automatically mean you have no protection, but it does change the legal basis for any claim.

The exact wording and enforceability of a specific tolerance clause always turns on the particular contract — there is no single template that applies to every case, and this needs legal review before you decide anything.

When you may be able to claim a price reduction

If the actual floor area after final measurement is smaller than contracted and the discrepancy exceeds any contractual tolerance threshold, you may have grounds to seek a price reduction proportionate to the missing floor area. The starting point for this analysis is the general Polish Civil Code provisions on statutory warranty for defects (rękojmia za wady, Articles 556 et seq. of the Civil Code) ✅, which — depending on the circumstances — can extend to a mismatch between the contracted and actual floor area. Whether the warranty provisions, the terms of the developer contract, or general rules on defective performance of an obligation apply, and exactly how any reduction would be calculated, requires a lawyer's assessment based on your specific documentation.

For real property, the warranty period is 5 years (Article 568 § 1 of the Civil Code) ✅ — but this is a general rule on defects in real property, not confirmation that every floor-area discrepancy automatically qualifies as a "defect" within the meaning of these provisions (whether a given discrepancy counts as a physical defect of the unit needs to be assessed on the specific facts). We are not promising any particular refund amount or case outcome — the size of any reduction, if one is available at all, depends on the contract's wording, the size of the discrepancy, and the calculation method applied in the specific case.

When withdrawal from the contract may be worth considering

Withdrawing from a developer contract is a more far-reaching remedy than seeking a price reduction, and in practice tends to be considered only where the floor-area discrepancy is very significant and genuinely affects the unit's fitness for its intended purpose — not for minor deviations. Whether a specific discrepancy gives grounds for withdrawal, on what legal basis, and by what procedure, requires an individual lawyer's assessment — this isn't a decision to make on your own based on a general guide.

Unfair contract terms concerning floor-area tolerance

If you are a consumer (an individual buying a flat unconnected with your business activity) ✅, you have broader protection than a business buying a unit for commercial purposes — this distinction affects which provisions can even be relied on (Article 22¹ of the Civil Code) ✅.

A floor-area tolerance clause that, for example, one-sidedly protects only the developer (letting it avoid paying for missing square metres, while giving the buyer no compensation where the flat turns out larger to the developer's disadvantage) is sometimes challenged in practice as a potentially unfair contract term (klauzula abuzywna). Whether a specific clause in your contract genuinely has that character requires a lawyer's analysis alongside the rest of the contract's wording.

Step by step: what to do

Gather your documentation — the developer contract, the information prospectus, the unit design, the final measurement report, and any correspondence with the developer.
Check the contract's floor-area and tolerance provisions — whether they exist, what threshold they set, and how the settlement mechanism works.
Compare the contracted floor area with the final measurement result — note the exact difference, both in square metres and as a percentage.
Notify the developer of the discrepancy in writing before taking any further steps — a written record makes it easier to pursue a claim later.
Get the documentation reviewed by a lawyer before deciding on a price reduction, withdrawal, or any other step — each option carries different consequences and formal requirements.

Frequently asked questions

Does every floor-area discrepancy entitle me to a price reduction?

Not necessarily — many contracts set a tolerance threshold below which a discrepancy gives no claim. Only once that threshold is exceeded (or where no such clause exists) might further steps become an option, and even then this needs a lawyer's assessment of your specific situation.

Can I withdraw from the contract just because the flat is a few square metres smaller?

It depends on the scale of the discrepancy, the contract's wording, and the circumstances — withdrawal is a more far-reaching remedy than a price reduction and isn't typically the reaction to a small floor-area deviation. Whether it's an option in your case should be assessed by a lawyer.

What if the contract doesn't have a floor-area tolerance clause at all?

The absence of such a clause doesn't automatically mean you have no rights — but it can change the legal basis of any potential claim. This is another reason to have the contract reviewed by a lawyer before deciding what to do.

Does the developer have to tell me the result of the final measurement?

Carrying out the measurement and establishing the definitive floor area is part of the procedure that precedes the transfer of ownership, but the exact scope of the developer's information obligations on this point needs to be confirmed against the specific contract and applicable law.

Legal basis and sources: Polish Civil Code provisions on statutory warranty for defects (rękojmia za wady, Articles 556 et seq., Article 568 § 1) and the definition of a consumer (Article 22¹) — the current, full text of the Act is available in the Internet System of Legal Acts (ISAP): isap.sejm.gov.pl. The handover procedure and developer obligations are governed by the Polish Developer Act of 20 May 2021 (Journal of Laws 2021, item 1177).

Need help with this?

If, after the final measurement, your flat's floor area differs from what's stated in the developer contract, it's worth starting by organising your documentation — the contract, the information prospectus, the measurement report, and correspondence with the developer. Twoja Sprawa helps you put together that documentation for a lawyer's further review; see also our other guides on disputes with companies (in Polish).