Bathroom finishing cost 2026 – prices, budget and common mistakes
Author: Tacjana MasiukiewiczFinishing and fitting out~13 min read
The cost of finishing a 4–6 m² bathroom in a new flat in September 2026 is indicatively about PLN 15–17k in the economy standard, PLN 26–30k in the mid-range and about PLN 49–56k or more in the high standard — including materials, sanitaryware installation and labour. Below we set out the budget item by item, show what the developer leaves in the bathroom in stan deweloperski (the developer's standard, without interior finishing) and discuss the mistakes that cost the most later: no waterproofing, wrong falls, weak ventilation and badly planned electrics.
Key points
- A 4 m² bathroom costs indicatively about PLN 15k / 26k / 49k (economy / mid-range / high standard), a 6 m² bathroom about PLN 17k / 30k / 56k.
- The biggest items are tiles with laying and the shower or bath area. Large formats and sintered stone raise the laying cost by as much as double.
- Bathroom waterproofing is about PLN 40–90/m² of labour — a small cost compared with repairing a flooded ceiling at the neighbour's.
- A bathroom finishing service in a unit of up to 150 m² may be taxed at 8% VAT, while materials you buy yourself usually carry 23%.
- The developer is liable for defects in the unit under the statutory warranty (rękojmia) for 5 years from handover of the flat — but not for defects caused by your crew.
A bathroom in stan deweloperski – what will you find in it?
In a typical stan deweloperski a bathroom is a raw room: plaster on the walls, a screed on the floor, water and drain connections brought out for the washbasin, WC, shower or bath and often a washing machine, electrical boxes without fittings and a ventilation grille. A radiator is sometimes installed, but not always. There are no tiles, sanitaryware, taps or furniture. A detailed comparison of the scope at different developers is in the article Stan deweloperski – what is included. What is binding is always the description of the standard in the information prospectus and the developer contract.
What bathroom awaits you? We have no data on the size of the bathrooms themselves in the catalogue, but we do have the structure of the offer. According to the TM Invest offer as of 27 September 2026, 2- and 3-room flats are about 75% of available units with a stated number of rooms (3,041 of 4,052 in Warsaw and Wrocław). We therefore assume — this is our assumption, not data from floor plans — that a typical bathroom in such a flat is about 4–5 m². That is why in the calculations we show 4 m² and 6 m² variants.
How much does bathroom finishing cost – a budget item by item
The amounts in the table are indicative ranges from company price lists, September 2026 (Warsaw and Wrocław), converted to a 4 m² bathroom with about 20 m² of tiles (floor and most of the walls). Each item covers material and installation. The economy standard is shop tiles, a shower cubicle with a tray and surface-mounted taps; mid-range — a walk-in shower with a linear drain and mid-shelf ceramics; high — large format, concealed taps and more expensive fittings.
| Item (4 m² bathroom) | Economy | Mid-range | High |
|---|---|---|---|
| Waterproofing (floor, wet area, tapes in corners) | 900 | 1,200 | 1,500 |
| Tiles with allowance, adhesive, grout, primer | 2,400 | 4,300 | 7,800 |
| Laying tiles (about 20 m²) | 3,000 | 3,800 | 6,400 |
| WC frame with pan, flush plate and boxing-in | 1,800 | 3,200 | 5,300 |
| Shower: cubicle with tray / walk-in with linear drain | 1,900 | 4,000 | 8,000 |
| Taps with installation | 800 | 1,900 | 5,000 |
| Washbasin with cabinet and mirror | 1,100 | 2,200 | 5,700 |
| Bathroom radiator (if the developer did not install one) | 700 | 1,300 | 3,000 |
| Fan, lighting, electrical fittings | 500 | 1,200 | 2,500 |
| Substrate preparation, silicone, plasterboard boxing, transport | 1,500 | 2,500 | 4,000 |
| Total | approx. 14,600 | approx. 25,600 | approx. 49,200 |
Labour in this summary is about 40% of the cost in the mid-range standard. The "fixed" items — frame, shower, taps, washbasin — cost the same in a 4 and a 6 m² bathroom. That is why a small bathroom is more expensive per metre, and a larger one costs more mainly for tiles and laying them.
| Bathroom | Economy | Mid-range | High |
|---|---|---|---|
| 4 m² (about 20 m² of tiles) | approx. PLN 14.6k (approx. 3,650 per m²) | approx. PLN 25.6k (approx. 6,400 per m²) | approx. PLN 49.2k (approx. 12,300 per m²) |
| 6 m² (about 28 m² of tiles) | approx. PLN 17.3k (approx. 2,900 per m²) | approx. PLN 29.6k (approx. 4,900 per m²) | approx. PLN 56.2k (approx. 9,400 per m²) |
| 6 m² with a 12% reserve | approx. PLN 19.4k | approx. PLN 33.2k | approx. PLN 62.9k |
A bathroom is usually 20–30% of the budget for the whole finishing. The cost of the remaining works in the three standards and budgets for flats from our offer are in the article How much flat finishing costs. If you prefer to give the whole job to one company, compare the packages described in the text Turnkey finishing – how much it costs.
Example: a bathroom in a 2-room flat from our offer
The median price of a 2-room flat in Wrocław is PLN 662k and in Warsaw PLN 756k — according to the TM Invest offer as of 27 September 2026. Take a 4 m² bathroom in the mid-range standard:
- bathroom cost: about PLN 25,600,
- 12% reserve: about PLN 3,100, in total about PLN 28,700,
- share of the flat price: about 4.3% in Wrocław (28,700 / 662,405) and about 3.8% in Warsaw (28,700 / 755,824).
Now VAT. Suppose the materials for this bathroom (tiles, chemicals, frame, shower, taps, ceramics) are worth about PLN 14,000 net. Bought by a company as part of a finishing service for a unit of up to 150 m², they may be accounted for at 8%, i.e. PLN 15,120 gross. Bought yourself in a shop — 23%, i.e. PLN 17,220. The difference: about PLN 2,100. The contractor may, however, add a margin on materials, and a bathroom cabinet that can be dismantled and moved usually does not qualify for 8%. The conditions for applying the lower rate are described in the article 8% VAT on flat finishing (in Polish).
Looking for a flat where you will have budget left for the bathroom and the rest of the finishing? We will help you choose a flat from a developer — including a ready one or one with a finishing package — so that the purchase price and the finishing cost fit within your means. For the buyer most often without a commission — the fee is usually paid by the developer.
A walk-in shower or a bath?
In a 4–5 m² bathroom a walk-in shower usually wins: it takes less space, leaves room for a washing machine and a cabinet, and the absence of a tray makes cleaning easier. It costs more than a cubicle with a tray, though — a linear or point drain in the floor, careful waterproofing and making a fall are added, and in price lists installing a linear drain alone is about PLN 550–1,500. A bath makes sense when there are small children at home or the bathroom is 6 m² or more — then both a bath and a separate shower will fit.
Before choosing a walk-in, check whether the drain connection and the screed thickness allow a drain to be set into the floor with an adequate fall. If not, what remains is raising the floor (a threshold at the door) or a low tray. Multi-family residential buildings are designed so that a bath or a shower cubicle can be installed in the bathroom — so both solutions are usually possible, but not always in every place in the bathroom.
Common mistakes in finishing a bathroom
No or inaccurate waterproofing
Tiles and grout are not watertight. Under the cladding in the shower area and on the floor you need waterproofing — most often a liquid membrane with tapes in the corners and collars at pipes and the drain. In a flat in a block a leak means flooding the neighbour below, and the repair means chipping off fresh tiles. Ask the crew for photos of the waterproofing before the tiles are glued.
A wrong fall in the shower area
In a shower without a tray the water must flow to the drain, not onto the rest of the bathroom. The fall must be planned before the screed and tiles — together with the drain position and the tile format (a large format is harder to shape around a point drain). Check it after laying: pour a bucket of water before you fit the glass.
Neglected ventilation
Moisture with no outlet means mould on the grout and ceiling. Do not cover the ventilation grille with boxing or a suspended ceiling, and leave an air inlet through the door. The 2002 regulation on technical conditions, under which buildings handed over today were designed, required openings or a gap with a cross-section of at least 0.022 m² (220 cm²) in the lower part of the bathroom door. If you want to add a fan, first ask the building manager what ventilation system the building has — with natural ventilation not every fan can be connected to the shared duct.
Sockets and lighting in the wrong places
Standard PN-HD 60364-7-701 divides the bathroom into zones around the bath and shower, in which restrictions apply to sockets and fittings and a protection rating is required (at least IPX4). All bathroom circuits should be protected by a 30 mA residual-current device, and sockets in the bathroom — under the technical conditions — by a dedicated circuit. Agree the placement of sockets by the washbasin, washing machine and mirror with the electrician on a drawing before the tiler starts work.
Too little space for the washing machine and inspection access
A washing machine needs a water connection, a drain and a socket — cheapest to leave it where the developer planned. Also leave access (an inspection hatch) to the valves and connections behind the frame boxing. The order of all works in the flat is described in the guide Finishing a developer-standard flat step by step.
Layout changes in the bathroom and the developer's guarantee
If the flat is still under construction, moving the connections for the WC, shower or washing machine is easiest to order from the developer as layout changes. Developers usually accept them only up to a certain construction stage and for an extra fee — deadlines and typical limits are described in the article Layout changes with the developer. After handover each moved point is extra work for a plumber, in price lists about PLN 350–700 per point, plus chasing and repairing the screed.
Alterations after handover also have legal consequences. The developer is liable for physical defects of the unit under the statutory warranty — for real estate, if a defect is established within 5 years of delivery (Art. 568 § 1 of the Civil Code). It is not, however, liable for damage caused by your crew's work, and with alterations to installations it is harder to show whether a leak is a building defect or a contractor's error. Before you start: report all defects at handover (see Flat handover from a developer), read the terms of the developer's guarantee, photograph the installations before they are covered, and require a written contract with the scope of work from the crew.
How not to overpay for a bathroom?
- Keep the developer's layout. Each move of a connection costs a few hundred zlotys plus accompanying work.
- Choose a standard tile format. Tiles up to about 60 × 60 cm are laid clearly cheaper than large format and sintered stone.
- Do not tile everything. Outside the wet area the walls can be painted with bathroom paint.
- Compare cost estimates item by item. How to collect and compare offers is covered in the article Flat finishing cost estimate.
- Do not economise on what you cannot see. Waterproofing, the frame and the drain are a fraction of the budget, and replacing them means chipping out the bathroom.
Frequently asked questions
How much does a turnkey bathroom cost in 2026?
Indicatively about PLN 15k in the economy standard, about PLN 26k in the mid-range and about PLN 49k in the high standard for a 4 m² bathroom — with materials, sanitaryware installation and labour (ranges from company price lists, September 2026). A 6 m² bathroom is about PLN 17–56k. It is worth adding a 10–15% reserve.
How much does bathroom finishing cost per m²?
In our calculation from about PLN 2,900/m² (6 m², economy standard) to about PLN 12,300/m² (4 m², high standard), counted from the floor area. The rate per metre is higher in a small bathroom because the fittings cost the same regardless of size.
How much does bathroom waterproofing cost?
In company price lists labour is about PLN 40–90/m², and for a whole 4–5 m² bathroom with material (liquid membrane, tapes, collars) it usually comes to about PLN 1–1.5k. It is one of the cheapest items, and it protects against the costliest mistake — flooding a neighbour.
What is in a bathroom in stan deweloperski?
Usually plaster, a screed, water and drain connections for the washbasin, WC, shower or bath and a washing machine, electrical boxes and a ventilation grille, sometimes a radiator. There are no tiles, sanitaryware or taps. The exact scope is set by the description of the standard in the prospectus and the developer contract.
Do alterations to installations in the bathroom affect the developer's guarantee?
The statutory warranty for defects of the unit does not lapse because of the finishing itself, but the developer is not liable for damage resulting from your contractor's work. With alterations to installations it is harder to show the source of a possible leak, so document the state of the installations with photos and check the terms of the developer's guarantee before the changes.
Summary
A bathroom in a new 2–3-room flat is usually an outlay of PLN 15–56k, and in the mid-range standard about PLN 26–30k — about 4% of the price of a typical 2-room flat from our offer. Tiles and the shower area cost the most, and mistakes in what you cannot see cost the most: waterproofing, falls, ventilation and electrics. Plan the bathroom before collecting the keys, and moves of installations — best as part of layout changes.
Want to factor finishing into your purchase budget right away? Book flat selection with us — we will show projects matched to your budget, including ready ones or ones with a finishing package. Most often without a commission for the buyer — the fee is usually paid by the developer. You will also find current offers in the project catalogue.
Legal status as of September 2026. Finishing prices are indicative ranges from company price lists (September 2026), and the calculations are illustrative. The text is not legal or tax advice; for electrical and plumbing installations follow the design and the opinion of a qualified installer.
Sources
- Act on goods and services tax (in Polish) – consolidated text Dz.U. 2025 item 775 (Art. 41(2), (12)–(12c), Art. 146ef).
- Act – Civil Code (in Polish) – consolidated text Dz.U. 2026 item 795 (Art. 568 § 1).
- Regulation on the technical conditions to be met by buildings and their location (in Polish) – consolidated text Dz.U. 2022 item 1225 (§ 78, § 79(1), § 92(3), § 188(2)); the 2002 act under which buildings handed over today were designed.
- Standard PN-HD 60364-7-701 – low-voltage electrical installations, requirements for rooms with a bath or shower.
- Finishing prices: indicative ranges from public price lists of finishing companies and price guides, September 2026.
- Flat prices: TM Invest project catalogue, as of 27 September 2026.
