Calculate the possibilities.

Demonstration model, reviewed 25 October 2026. Gross area = width × height × identical wall count; net = gross − all openings. Only cladding includes a 7% allowance. Insulation and substructure use net area; scaffolding uses gross area. Insulation thickness × PLN 4.70 (wool) or 3.10 (EPS) / m² / cm includes material and fixings. Insulation installation: PLN 28/m². Complexity and region factors apply only to labour. Flashings: PLN 22/net m²; transport PLN 1,100; coordination PLN 1,900. No minimum charge. The ±15% range is an uncertainty scenario, not a guaranteed range. Glass, ceramic, stone, plaster and additional service prices are internal demonstration assumptions, not verified quotations. ETICS cladding includes reinforced base coat and render; insulation is separate. EPS is available only for ETICS/render; system selection requires a technical design.

The standard rate of 23% is applied. A reduced 8% rate may apply to qualifying comprehensive residential services after legal verification. The calculator does not assume eligibility.