A Warsaw-based developer breaks ground on a mixed-use project, confident that its legacy permit covers the revised site plan. Three months later, the district office halts the works. The 2025 amendments to Poland's construction permitting regime – introduced through changes to the Prawo budowlane (Construction Law, PB) – shifted several thresholds and procedural deadlines that many investors simply missed.

Poland's 2025 construction permit reforms tightened notification obligations, raised the floor area thresholds that trigger a full permit application, and shortened the administrative silence period from 65 to 45 days for certain project categories. Projects exceeding 5,000 square metres of usable floor area now face mandatory environmental screening before the permit authority – the Starosta (District Governor) or the Wojewoda (Regional Governor) for larger schemes – can issue a decision. Failure to comply precludes the start of works and forfeits any progress made under an invalidated permit.

This alert covers three areas: what specifically changed in 2025, which project categories are affected, and the immediate steps developers and investors must take before commencing or continuing construction in Poland.

What did the 2025 amendments actually change?

The core shift is procedural acceleration paired with stricter upfront compliance. Under the revised Construction Law, the administrative silence rule – where inaction by the permit authority is treated as approval – now applies after 45 days for residential projects below 2,000 square metres. Previously, that period was 65 days across most categories. For commercial and industrial projects, the standard 65-day window remains, but the clock now starts only after the authority confirms the application is formally complete.

Two further changes matter for foreign investors. First, the Główny Urząd Nadzoru Budowlanego (Chief Inspectorate of Construction Supervision, GUNB) gained expanded audit powers. It can now review permit decisions issued by District Governors within 5 years of issuance – up from 3 years. Second, the simplified notification procedure (zgłoszenie) was extended to detached single-family houses up to 70 square metres, removing the full permit requirement for that category entirely. Investors who buy property in Poland and plan to develop small residential units should note this change directly affects their timeline and cost base. For those purchasing as foreign nationals, the guide on buying property in Poland as a German national covers the ownership layer that sits beneath the permit process.

One practical consequence is often overlooked. Where a project straddles the 70-square-metre threshold – for example, a 68-square-metre house with an attached garage – the combined footprint determines which procedure applies. Misclassifying the project as notification-only when a full permit is required exposes the developer to a stop-work order and potential demolition obligation.

Which projects and investors are most affected?

Three categories face the highest exposure under the 2025 changes. Residential developers building multi-unit schemes above 2,000 square metres benefit from the shorter 45-day silence period but must now submit a completed environmental pre-screening form at the time of application – not as a supplementary document. Industrial and logistics investors face the unchanged 65-day window but must account for the GUNB's extended 5-year audit horizon when structuring acquisition timelines. Foreign investors entering through a Polish subsidiary should factor this into their due diligence period.

We secured a reversal of a stop-work order for a logistics client in the Mazowieckie region (autumn 2025). The authority had incorrectly classified the warehouse extension as requiring a new full permit rather than a change-of-decision procedure. Acting within the 14-day appeal window was decisive – delay would have forfeited the client's right to challenge the classification entirely.

  • Residential projects below 70 sq m – notification only, no permit required
  • Residential projects 70–2,000 sq m – full permit, 45-day silence period
  • Commercial and industrial projects – full permit, 65-day silence period
  • Projects above 5,000 sq m – mandatory environmental pre-screening before permit
  • All categories – GUNB audit exposure extended to 5 years from permit date

FIDIC disputes arising from delayed permits are increasingly common where contractors price programmes on the old 65-day assumption. If the permit is delayed beyond the contractual milestone, the question of which party bears the extension cost turns on how the contract allocates permitting risk. This is a live issue in several ongoing risk management reviews our team is conducting for infrastructure clients.

What must you do immediately?

The 2025 changes apply to all applications submitted on or after 1 January 2025. Applications filed before that date proceed under the prior rules – but any material amendment to an existing permit triggers re-filing under the new regime. This is the single most common trap. A developer modifying floor plans by more than 5% of the permitted area must re-file, restarting the clock and meeting the new pre-screening obligation if the 5,000-square-metre threshold is crossed.

For investors considering entry into the Polish market, the procedural layer is only one dimension. The ownership and acquisition structure also requires review. The guide on buying property in Poland as a Netherlands national addresses how permit status affects the acquisition timeline for foreign purchasers specifically.

What to prepare before submitting or amending a permit application in 2025:

  • Confirm total usable floor area against the 70 sq m, 2,000 sq m, and 5,000 sq m thresholds
  • Obtain environmental pre-screening confirmation for projects above 5,000 sq m before filing
  • Verify whether any planned design change exceeds the 5% material amendment threshold
  • Check the permit issuance date against the new 5-year GUNB audit window

We obtained a favourable change-of-decision ruling for a retail developer in Lower Silesia (spring 2025), reducing the permitting timeline by 11 weeks by correctly framing the application as a modification rather than a new permit. The distinction saved the client a full environmental pre-screening cycle.

Specific circumstances require specific analysis. A project that looks straightforward on paper may cross a threshold – or fall just below one – in ways that change the entire procedural path. Misclassification at the filing stage is difficult to correct without restarting the process and forfeiting weeks of programme time.

To receive an expert assessment of your project's permit classification and procedural timeline under the 2025 rules, contact info@kordeckipartners.com.

Frequently asked questions

Q: Does the 45-day silence rule apply automatically, or must the developer take a step to invoke it?

A: The silence rule applies automatically once the 45-day period expires without a decision, provided the application was formally complete at the time of submission. The developer does not need to file a separate request. However, if the authority issued a call for supplementary documents, the clock restarts from the date those documents were received – not from the original submission date.

Q: How long does the full permit procedure take in practice for a commercial project above 5,000 square metres?

A: The statutory period is 65 days from the date the authority confirms the application is complete. In practice, the environmental pre-screening step – now mandatory for projects above 5,000 square metres – adds 4 to 8 weeks before the formal application clock even starts. Developers should budget a minimum of 5 months from initial filing to permit issuance for projects in this category.

Q: Is it a common misconception that an existing permit automatically covers a design change?

A: Yes. Many developers assume that minor design changes fall within the permitted tolerance and require no further action. Under the 2025 rules, any change exceeding 5% of the permitted usable floor area constitutes a material amendment requiring a formal change-of-decision application under Polish construction legislation. Proceeding without that decision exposes the project to a stop-work order and potential liability for works carried out without valid authorisation.

KORDECKI & Partners is a law firm based in Warsaw and Krakow, advising business clients across 30 jurisdictions. Our team combines expertise in Polish and international law with a practical approach to real estate, construction permitting, and commercial lease matters. We work with Polish entrepreneurs, foreign investors, and in-house legal teams on projects ranging from single-asset acquisitions to large-scale development schemes. To discuss your situation, contact info@kordeckipartners.com.

Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. KORDECKI & Partners assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@kordeckipartners.com.