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Mortgage for a wooden or timber-frame house in Poland: valuation and documents

Will a Polish bank finance a timber-frame, log or prefabricated wooden house: what the valuer checks, which documents to prepare for building or buying, tranches and insurance for a house with a combustible structure.

KredytPolska editorial team
Updated:

In short

Most large Polish banks lend for a wooden or timber-frame house on the same terms as for a masonry one, if it stands on a foundation, has a building permit or notification and is suitable for living all year round. The bank and the valuer look more closely at the technology, the builder and the quality of the timber, so prepare the design, the contract with the builder, the cost estimate and material certificates in advance. Insurance for a house with a timber structure usually costs more, so compare several offers before you sign the loan agreement.

When the bank will lend

Under the Polish Construction Law a building is permanently attached to the ground and has foundations and a roof; under the Civil Code it is part of the plot. The wall material does not matter. A wooden house meets the bank's conditions when it stands on a foundation on your own plot with a land and mortgage register (księga wieczysta), has a building permit or an effective notification, and is a year-round house with heating and utilities. A cabin on wheels or without a foundation is movable property, so it cannot secure a mortgage.

How the valuation works

A licensed property valuer prepares a valuation report (operat szacunkowy) for the bank. For a wooden house the valuer looks at the same things as for a masonry one: durability of the structure, market value, how easy the house would be to sell and compliance with the rules. The report describes the technology (timber frame, logs, prefabricated panels) and the timber: structural timber of at least class C24, kiln-dried to about 15–18% moisture, with CE marking, designed to PN-EN 1995-1-1 (Eurocode 5). The loan amount is calculated from this value under the KNF Recommendation S, usually up to 80%, or up to 90% with additional security.

Documents and tranches

For a new build: the final building permit or notification without objection, the building design describing the technology, the contract with the builder with a payment schedule, a cost estimate (often on the bank's form), timber and board certificates, the construction log and plot documents. The bank pays out in tranches after each stage; the first is usually at most 25–30% of the loan, while timber-frame builders often want 30–60% upfront, so the difference usually comes from your down payment. For an existing house, ask for the design, year of construction and builder's details, the energy performance certificate, and order an inspection by a building engineer before the preliminary contract. Most banks need documents in Polish.

Insurance

The bank requires fire and natural hazard insurance assigned to the bank. Insurers treat load-bearing timber walls as a combustible structure and usually apply a higher rate; some need prior approval. In a sample comparison by the broker CUK for a 100 m² house worth 400,000 zł, cover for the walls with a combustible structure cost from 492 zł to 1,549 zł a year. You can buy the policy from the bank or from any insurer that meets the bank's conditions.

The full description in Polish: Kredyt na dom drewniany lub szkieletowy.

Frequently asked questions

Will a Polish bank give a mortgage for a timber-frame house?

Yes. Most large banks finance building and buying timber-frame houses on the same terms as masonry ones, if the house stands on a foundation, has a permit or notification and is suitable for year-round living.

Does the bank value a wooden house lower?

Not by default. The valuer sets the value from the technical condition, quality of construction and prices of similar houses nearby, and describes the technology and timber quality in more detail.

Is insurance for a wooden house more expensive?

Usually yes, because insurers classify load-bearing timber walls as a combustible structure. Prices differ a lot between insurers, so compare several offers.

Sources

  1. Construction Law of 7 July 1994 (Polish)
  2. KNF: Recommendation S (Polish)
  3. kb.pl: banks, insurers and timber-frame houses, 14.01.2026 (Polish)
  4. hipoteczny.pl: mortgage for a modular or prefabricated house, updated 19.02.2026 (Polish)
  5. CUK: combustible structure and home insurance, updated 20.07.2026 (Polish)
This guide describes general rules and typical bank practice as of October 2026. Details

It is not legal or tax advice and not a bank offer. Each bank sets its own criteria, and the lending decision is always made by the bank.

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