“How much does a bathroom renovation cost?” is one of the most searched renovation questions online. Giving a single figure would mislead, because two bathrooms of the same size can differ several times over in price. This article breaks the cost down factor by factor so you can compare quotes properly.
The 7 factors behind the cost
- Layout changes: if sanitaryware positions stay, some existing lines can be reused; if they move, the plumbing, drain and falls are rebuilt. This is where the largest price difference comes from.
- Extent of plumbing renewal: there is a significant gap between simply changing taps and fully renewing the clean and waste water lines. In older buildings, renewing the lines is advisable; see our plumbing guide.
- Waterproofing: liquid membrane on the floor and around the shower, with corner tape, is standard. Skipping it saves money briefly and costs compensation to the flat below later.
- Tile grade and format: there is both a material and a labour difference between a standard domestic range and large-format imported tiles; large formats demand a level floor.
- Sanitaryware and tap segment: the gap between economy, mid-range and premium WCs, basins and taps adds up. Concealed cisterns and wall-hung WCs also affect installation cost.
- Special details: a walk-in shower, glass screen, recessed wall niche, underfloor heating, concealed lighting — each adds both material and labour.
- Units and mirror: there is a difference between ready-made modules and made-to-measure moisture-resistant units.
Three scenarios by scope
| Scenario | Scope | Cost level |
|---|---|---|
| Refresh | Taps, mirror, unit, silicone renewal | Low |
| Standard renewal | Tiles, sanitaryware, waterproofing; layout unchanged | Medium |
| Full transformation | Plumbing plus layout change plus custom shower area | High |
The spread between these three for the same bathroom is why “bathroom renovation price” has no single answer.
Hidden items that inflate a budget
- Decayed pipework or damp screed revealed during the strip-out
- Repairing an old leak that has reached the flat below
- Door and frame replacement (may be needed when floor levels change)
- Adding a ventilation (extractor) duct
- Debris removal and haulage (higher in buildings without a lift)
Discussing these risks at the consultation, and clarifying how “unexpected conditions” are handled in the quotation, prevents surprises during the work.
Where to save, and where not to
You can save on: plain tile ranges instead of patterned, mid-range rather than premium sanitaryware, ready-made units. You should not save on: waterproofing, plumbing quality, drain falls and pressure testing. The invisible layers determine the bathroom’s lifespan; money saved there comes back multiplied within a few years.
How to get a proper quote
Ask for an itemised written quote: strip-out, plumbing, waterproofing, tiling (material and labour separately), sanitaryware, units, labour and debris removal should each appear as separate lines. Quotes with unequal scope cannot be compared; see what to look for in a renovation company.
Demgirişim delivers bathroom renovation including plumbing, waterproofing and tiling with a single team; consultation and written quote are free within Istanbul.
Frequently asked questions
Why is a bathroom the most expensive room per square metre?
A small area holds plumbing, waterproofing, tiling, sanitaryware, units and lighting all at once. The variety of materials and the intensity of labour push the cost per square metre above the rest of the home.
Which item inflates a bathroom budget most?
Changing the layout. Moving the WC, shower or basin means re-running the plumbing, the drain and the waterproofing. Keeping the layout makes the same bathroom noticeably cheaper to renew.
When is the exact bathroom price known?
After the consultation. The condition of the existing plumbing and the state of the floor and walls can only be judged on site; the itemised written quote follows that inspection.
The initial consultation and written quote for Renovation & Repair are free within Istanbul. Scope, duration and cost are confirmed after the consultation.