Legal Due Diligence Before Buying Property in Poland

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

Buying a flat, house or plot in Poland while living in the UK? The biggest risk usually isn't the price — it's what you can't see at first glance: a mortgage still registered against the property, a third-party claim, a building that doesn't match its planning status, or a tenant who is hard to remove. This guide sets out what legal due diligence on a Polish property should cover, and what to ask a lawyer or notary while managing the purchase remotely.

Key points

Who this guide is for

Contents

What legal due diligence covers, and why it matters more remotely

Legal due diligence is a systematic check of a property's legal and administrative status before you sign a preliminary agreement (umowa przedwstępna) or the final notarial deed (akt notarialny). It covers several independent areas: the księga wieczysta (land and mortgage register), the planning/zoning status of the plot, encumbrances not visible in the register, the seller's identity and authority to sell, any occupiers, and — for buildings — energy-performance documents.

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Living in the UK, you can't drop into a local government office or the land registry court to check something in person. Due diligence has to be planned in advance and instructed to someone on the ground — a lawyer, the notary handling the transaction, or your attorney-in-fact — with a clear list of questions, before you pay a deposit or sign anything binding.

Step 1: The land and mortgage register

The księga wieczysta is kept to establish the legal status of a property; it can also be kept for a cooperative ownership right to a flat (spółdzielcze własnościowe prawo do lokalu, a Polish-specific hybrid form of ownership with no direct UK equivalent).

Registers are public — nobody can claim ignorance of what's entered, or of pending applications noted against the entry. Browsing the register through the Electronic Land and Mortgage Registers system (ekw.ms.gov.pl) is free — you only need the register number, from the UK at any time.

The register has four sections:

Section What it contains
I (I-O and I-Sp) Description of the property and rights connected with ownership; I-Sp lists rights in shared parts
II Ownership and perpetual usufruct — who legally owns the property
III Limited rights in rem other than mortgages, restrictions on disposal, other rights/claims
IV Mortgages

The law creates a presumption that a right disclosed in the register matches the actual legal status, and that a deleted right is presumed not to exist. There is also a "public faith" mechanism (rękojmia wiary publicznej): where the register's content diverges from the real legal position, the register prevails in favour of a buyer who acquired the right from the person entered as rights-holder — comparable in purpose, though not in mechanics, to how HM Land Registry title guarantees work.

The protection has important limits: it does not protect gratuitous transfers, nor a buyer acting in bad faith (who knew, or could easily have found out, that the register didn't match reality); it does not apply against rights encumbering the property by operation of law, life-interest rights (dożywocie), or certain easements; and it is excluded by a marginal note about a pending application, an appeal, or a cassation appeal, and by a warning entry flagging a discrepancy — so due diligence has to look at more than the headline entries.

In practice: it's not enough to see the seller listed in Section II as owner — you need to review the whole register, including notes, warnings, and Sections III and IV. We cover how to read each section in How to Check the Polish Land and Mortgage Register.

Step 2: Planning status — local plan and development conditions

For a house, building plot, or land for development, due diligence must also cover planning status. Land use in Poland is determined by the local zoning plan (miejscowy plan zagospodarowania przestrzennego, MPZP — roughly analogous to a UK local plan, though the legal effect differs); in its absence, by a development-conditions decision (decyzja o warunkach zabudowy, "WZ") for non-public investments, or a public-investment location decision.

MPZP provisions shape how ownership rights can be exercised — everyone has the right to develop land they hold title to in line with the plan or the WZ decision, provided this doesn't infringe a legally protected public interest or third-party rights. Anyone has the right to inspect the plan and obtain excerpts and extracts (wypis i wyrys) — this can also be done remotely, through an attorney-in-fact or a municipal geoportal.

Municipalities are required to adopt a new planning instrument, the "general plan" (plan ogólny), and the deadline was pushed from 30 June to 31 August 2026; transitional rules apply until then. The general plan underpins WZ decisions but — unlike an MPZP — doesn't directly govern what can be built on a specific plot.

Where there's no MPZP, issuing a WZ decision requires several conditions together, including the "good neighbour" principle (an adjacent plot on the same public road must already be developed), access to a public road, adequate utilities, and generally confirmation the land sits within an infill-development area of the general plan, with some exceptions.

Practical step: instruct your attorney-in-fact to request a plan excerpt and extract (statutory fee: 30–50 PLN plus up to 200 PLN for the extract, 250 PLN combined maximum; turnaround 7 days to a month). This shows the plot's designated use in black and white, independent of anything the seller tells you. Details on a building's legal status and unauthorised-construction risk are in Planning Permission, Building Status and Unauthorised Construction in Poland.

Step 3: Risks not visible in the register

This is the part most easily missed when buying remotely: the register is not the only source of legal risk information.

Property type changes the scope: for a flat, Section I-Sp (share in common parts) is key; for a house/plot, conformity with the local plan and unauthorised-construction risk matter most; for agricultural land, additional rules apply (Agricultural System Act, KOWR's first-refusal right), outside this guide.

Step 4: Who the seller actually is

Verifying the seller's identity and authority is as important as the register entry itself:

Step 5: Occupiers and registered residents

Buying a flat where someone other than the seller lives or is registered as resident (zameldowanie, a Polish residence-registration formality distinct from tenancy) is a common risk on the resale market, especially remotely, where it's hard to verify the situation in person. Request a certificate confirming no registered residents, and establish whether the property is subject to any tenancy, before signing a preliminary agreement. Removing a registered resident or evicting a tenant after completion can be slow and costly, so rule out this risk beforehand. See Buying a Resale Property in Poland: Legal Risks and Checks for the fuller resale-market risk picture; tenant- and mortgage-specific scenarios are covered in more depth in the Polish-language guides linked from the Polish version of this article.

Step 6: The energy performance certificate

The seller must hand the buyer an energy performance certificate (świadectwo charakterystyki energetycznej — the Polish equivalent of an EPC) when the notarial deed is executed. The buyer cannot waive this right. The notary records whether the certificate was handed over; if not, the notary must advise of the fine for non-compliance.

The certificate is valid for 10 years and expires early if works change the building's energy performance. It only applies to a building or unit — not undeveloped land.

New-build (developer) vs. resale — how due diligence differs

The scope of legal due diligence differs depending on whether you're buying from a developer or on the resale market:

Element New-build (developer) Resale
Legal basis 2021 Developer Protection Act (ustawa deweloperska) Civil Code general sale provisions
Protection for payments Housing escrow account (open or closed) plus the Developer Guarantee Fund (DFG) No dedicated mechanism — a notarial escrow is worth considering
Pre-contract disclosure Mandatory prospectus (prospekt informacyjny) with annexes No equivalent — due diligence relies on documents gathered individually
Registering the claim The notary must, of their own motion, file for entry of the buyer's claim in the register Requires a separate application, usually initiated by the parties
Statutory warranty (rękojmia) Handover procedure under the Developer Act first, then general Civil Code warranty (5 years) General Civil Code warranty — 5 years from handover

On the resale market, the seller is liable by operation of law for physical and legal defects under the statutory warranty (rękojmia), unless liability has been validly limited or excluded — which, against a consumer buyer, is only permitted in specific statutory cases and is ineffective if the seller fraudulently concealed a defect. The seller is released from liability if the buyer knew of the defect at contracting — relevant to "as seen" purchases and defects obvious on inspection.

When buying from a developer, due diligence should additionally cover the developer's financial standing and track record (company register, reviews of past projects) — see zakup nieruchomości z rynku wtórnego — ryzyka i kontrola prawna (in Polish).

What to require from a lawyer working remotely from the UK

Remote due diligence needs a clear brief. Agree with your lawyer or notary, in writing:

  1. Scope — a full register review, MPZP/WZ verification, checks on arrears and registered residents, or only part of these.
  2. Reporting format — a written summary of risks (in Polish and, where possible, English for a UK-based partner), not just a phone call.
  3. Timeline — when due diligence must be completed relative to the planned preliminary agreement or notarial deed.
  4. Communication at signing — notarial acts are performed in Polish; at a party's request, the notary may also carry out the act in a foreign language, using their own language skills or a sworn translator. If a party doesn't understand Polish and no translation is attached, the notary must translate the deed personally or with a sworn translator — for a UK buyer, a sworn translator's presence is standard practice.
  5. Foreign-buyer permission status — if the buyer or a co-buyer is a UK national, the lawyer should separately verify whether the transaction needs a Ministry of Interior and Administration (MSWiA) permit for a foreigner to acquire real estate (mainly houses and plots — a standalone residential unit is generally exempt).

If you want to understand the whole purchase process step by step before instructing due diligence, see How to Buy Property in Poland: A Step-by-Step Guide for UK Buyers.

If you're wondering whether your situation needs professional due diligence before you go further, you can request a free initial assessment — we help you organise documents before passing them to a lawyer.

Documents you will need

Common risks and mistakes

  1. Stopping at Section II of the register — missing notes, warnings, and Sections III/IV, which can exclude "public faith" protection.
  2. Skipping planning status checks — buying a plot without checking the local plan or development conditions, which can block the investment you had in mind.
  3. Relying on the seller's verbal assurances about arrears or pending proceedings, without a written certificate.
  4. Not verifying spousal consent where the property forms part of the seller's marital community property.
  5. Signing a preliminary agreement in ordinary written form, expecting to force completion through the courts — that remedy is only available if the preliminary agreement itself was made in notarial form.
  6. No plan for discharging a mortgage when buying an encumbered property.
  7. Assuming a flat purchase creates a right of residence in Poland — it does not, and is not a basis for a visa or residence permit.

Checklist

Frequently asked questions

Is checking the land and mortgage register enough to buy safely in Poland? Not always. The register is the foundation of due diligence and benefits from the "public faith" protection, but it doesn't disclose everything — e.g. a pending unauthorised-construction legalisation procedure or service-charge arrears. A full exercise needs additional certificates, depending on property type.

Can I check the register myself from the UK? Yes. The Electronic Land and Mortgage Registers portal (ekw.ms.gov.pl) is free and online — you only need the register number. Certified copies, extracts, and certificates ordered through the portal are chargeable.

What if the seller says a mortgage is repaid but it still shows in Section IV? Agree a settlement mechanism with the notary that protects your funds until the entry is actually deleted, rather than relying solely on the seller's assurances — the exact mechanism (e.g. a notarial escrow) needs confirming with the notary.

Does due diligence look different for a flat versus a house with land? Yes. For a flat, Section I-Sp of the register (share in common parts) and certificates from the owners' association or cooperative matter most. For a house and plot, add verification of conformity with the local plan or development conditions, and unauthorised-construction risk — a check not covered by the register itself.

As a UK citizen, do I need a permit to buy a flat in Poland? Acquiring a standalone residential unit is generally exempt from the MSWiA permit requirement, regardless of nationality. A house with land, or a bare plot, generally requires a permit unless another exception applies (e.g. 5 years of lawful permanent residence). Every case needs individual assessment by a lawyer.

Should I hire a building surveyor if I'm buying remotely? That's practical, though it goes beyond legal due diligence — a surveyor or trusted person on the ground can assess the building's actual physical condition in a way no legal document will. Legal due diligence and a technical survey are complementary but separate.

Deadlines

Related guides

Przeczytaj po polsku: Audyt prawny nieruchomości przed zakupem w Polsce

Sources

Information verified on: 11 July 2026.

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