Costs and formalities
What changed in Polish building law in 2026?
In Poland, most provisions of the amendment simplifying the building process took effect on 7 January 2026, but they do not exempt you from verifying the design. Before buying roofing, sandwich panels and insulation, check whether the planned works fall within the expanded catalogue of investments covered by simpler procedures. It is essential to determine the type of building and its parameters, not its resemblance to a photo from the internet. Remember that an exemption from a permit does not release you from ensuring safety and meeting technical requirements. The designer should confirm the scope of documentation and the appropriate conditions for the roof and partitions.
Which changes matter to the investor?
A significant part of the simplification amendment to the construction process came into force on 7 January 2026. The catalogue of investments covered by simpler procedures was expanded. The changes concern specifically described structures and works, not all work carried out on a house.
Therefore, start by determining the type of planned structure. A covered terrace, a shelter, a garage and an outbuilding may look similar. However, their classification does not result solely from their appearance. The purpose, the parameters and the way they are connected to the existing building are important.
The article adopts the status verified as of 1 November 2026. If the investment is started later, verify the regulations again. A draft amendment and a ministry announcement are not the same as an enacted act or regulation.
Does the simpler procedure exempt from a technical design?
Exemption from a permit does not give the right to construct anything at will. Safety must still be ensured and the requirements specific to the structure must be met. The scope of the required documentation depends on the chosen procedure and the type of works.
For a roof made of T18 or T35, the supports and fixing must be checked, among other things. For a sandwich panel, the joints, the thickness of the facings and the fire requirements are also relevant. The product name does not replace the calculations for snow and wind at the construction site.
It is worth using the savings on formalities to prepare the order better. The designer can determine the sheet lengths, the drainage method and the required flashings in advance. As a result, the simpler procedure translates into smoother works, not into a greater number of decisions made on site.
What does the possibility of remedying deviations involve?
The new solutions include a warning mechanism for certain unlawful, significant deviations from the documentation. This is not permission to change the design arbitrarily. The application of the mechanism depends on the statutory conditions and the actions of the building supervision authority.
Before moving supports, raising the roof or changing its geometry, consult the intended change with the designer. Remedying the deviation may require works whose cost will exceed the savings achieved by the unauthorised change. This applies in particular to elements already ordered and cut to size.
Do not confuse this procedure with the legalisation of a building erected without the required consent. These are different situations. The correct route is determined by the facts and the legal basis, not by merely describing the problem as a ‘construction error’.
Can every unauthorised construction be legalised after ten years?
No. The new ten-year threshold applies to specific works carried out with significant deviations from the permit or design. In these cases, the provisions refer to the appropriate application of the simplified procedure. No general rule of legality for all older buildings has been introduced.
The basic simplified legalisation of unauthorised construction still involves separate conditions, including the lapse of at least twenty years from completion of construction. The age of the structure alone does not replace documents and an assessment of its safety.
For a planned renovation of an old hall, first collect the decisions, drawings and completion documents. Only then define the scope of modernisation. Purchasing new wall panels does not remove the building’s earlier non-compliance with the documentation.
How do you apply the technical conditions after September 2026?
The previous regulation on technical conditions lost effect in September 2026. The legislator provided for transitional provisions. These allow the former requirements to be applied in specific situations for a period of eighteen months counted from 20 September 2026.
One of the key elements of this route is the investor’s declaration that the design has been prepared in accordance with the previous provisions. This solution should not be presented as a simple extension of the old regulation’s validity. The basis for applying the requirements is different.
In practice, determine with the designer which provisions apply to the entire project. This choice affects, among other things, the assessment of the thermal insulation of partitions. Do not select PIR thicknesses on the basis of a single table found without a date and without information on the correct legal status.
How do you prepare a materials order when the law changes?
In the request for quotation, state the intended use of the structure and the required parameters. For insulation, the declared lambda, thickness and intended use of the board are needed. For a sandwich panel, the facings, the type of joint and the classification of the entire solution are also important.
Separate mandatory data from your own expectations. You may want better insulation than the minimum appropriate for the project. This is a justified choice, but it should result from calculations, budget and space for the layers. Not every thicker board fits the planned detail.
Before ordering production, finalise the list of agreements with the designer and contractor. Confirm the version of the documentation, the construction procedure and the method of delivery acceptance. A change in regulations does not have to complicate purchasing if the requirements are clearly stated and checked before ordering.
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