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Renovation Cost Calculator 2026 — Poland

Planning a renovation and want to know how much to budget? This calculator estimates renovation cost based on four parameters: floor area, scope of work (from refresh to premium), bathroom renovation and number of rooms (interior doors). Base prices (PLN/m²) for 2026: refresh 400 PLN/m², standard renovation 800 PLN/m², renovation plus 1300 PLN/m², premium renovation 2200 PLN/m². On top of the base cost, bathroom renovation (PLN 5,000–45,000 depending on scope) and interior doors (PLN 800/room) are added. The result shows: estimated cost, minimum range (–20%) and maximum range (+40%) — because renovations almost always cost differently than planned. Budget with a 15–20% financial reserve.

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How the renovation cost calculator works

Formula: 1. Base cost = area_m2 × price_per_m2[scope] - Refresh: PLN 400/m² - Standard renovation: PLN 800/m² - Renovation plus: PLN 1,300/m² - Premium renovation: PLN 2,200/m² 2. Bathroom cost (if YES): - Refresh: PLN 5,000 - Standard: PLN 15,000 - Plus: PLN 25,000 - Premium: PLN 45,000 3. Door cost = number_of_rooms × PLN 800 4. Estimated total = sum of above 5. Minimum = estimated × 0.80 6. Maximum = estimated × 1.40

Example: standard renovation 50m², bathroom, 3 rooms

Standard renovation, 50 m², with bathroom, 3 rooms: base cost = 50 × 800 = PLN 40,000 + bathroom PLN 15,000 + doors 3 × 800 = PLN 2,400 = PLN 57,400 estimated. Minimum: 57,400 × 0.8 = PLN 45,920. Maximum: 57,400 × 1.4 = PLN 80,360.

Frequently asked questions about renovation costs

How much does apartment renovation cost in Poland in 2026?

Renovation costs range from PLN 400 to PLN 2,200/m² depending on scope. A refresh (painting, minor repairs) is about PLN 400/m². Standard renovation (floors, walls, kitchen) is about PLN 800/m². Renovation plus is PLN 1,300/m², and premium with top materials is PLN 2,200/m². Add bathroom and door costs separately.

How much does bathroom renovation cost in Poland?

Bathroom renovation: from PLN 5,000 for a refresh, PLN 15,000 for standard, PLN 25,000 for plus, up to PLN 45,000 for premium. High costs come from plumbing, electrical, tiling, fixtures and wet rendering.

How much do interior doors cost when renovating?

Average cost of one door set with frame and installation is about PLN 800. The calculator uses PLN 800 × number of rooms. Full replacement during a major renovation is often PLN 3,000–10,000 total.

The calculator provides: estimated cost (base), minimum (–20%, when doing some work yourself and using cheaper materials) and maximum (+40%, premium materials or contractors in expensive cities). The range reflects local labour rates, material quality and renovation surprises.

Refresh (PLN 400/m²): new paint, minor repairs, handle replacement. Standard renovation (PLN 800/m²): new floors, plaster, partial installation replacement. Premium renovation (PLN 2,200/m²): structural changes, new installations, designer materials, architect's design.

Common mistakes: no financial reserve (always plan 15–20% more), no written contract, buying materials without checking measurements. Good planning: list works by priority, collect multiple quotes, pay in stages — not upfront.

For 50 m²: refresh 2–4 weeks, standard renovation 6–10 weeks, full renovation 10–16 weeks. Correct order: demolition → installations → plastering/screeding → windows → rendering/painting → tiling → floors → doors → fixtures.

No permit needed: painting, floor replacement, fixture replacement. Notification required: non-load-bearing wall removal. Building permit required: load-bearing walls, change of use.

Contract must include: detailed scope with materials, gross price or unit rates, payment schedule by stages, delay penalties, minimum 2-year warranty. Ask for references and photos of previous work. Avoid paying the full amount upfront.

Save on: decorative materials, buying from trade suppliers (15–30% cheaper), painting yourself. Do NOT save on: electrical and plumbing installations, bathroom waterproofing, quality of external doors and windows.

Calculator results are indicative and based on average market prices for 2026 in Poland. Actual costs depend on location, contractor quotes, apartment condition and materials chosen. Always collect at least 3 quotes from contractors before making a decision.