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Renovating a bathroom – step by step, cost and ROT

The bathroom is the room in the home where mistakes are most expensive. Here is how to plan the renovation, choose qualified tradespeople and get the right documentation for the waterproofing.

Illustration for the guide: Renovating a bathroom – step by step, cost and ROT

By the Fixtorget editorial team · Updated 5 November 2026 · 2 min read

Plan in the right order

  • Decide on a budget and what is to be replaced – everything or just parts.
  • Get quotes with a clear schedule.
  • Demolition, and any relocation of pipes and electrics.
  • Waterproofing, wall tiles and floor tiles.
  • Fitting of sanitaryware, taps and fixtures.

Insist on industry rules for wet rooms

Hire a company that works according to the industry rules for wet rooms, such as GVK or BKR (the Swedish wet-room industry bodies), and ask for quality documentation for the waterproofing. The documentation is important for your insurance and when you sell the property.

Plumbing and electrics require authorisation

Plumbing work should be done by a certified plumber (for example one certified under Säker Vatten, the Swedish safe-water installation scheme) and electrical work by a registered electrical installation company. Ask whether this is included in the quote or whether you need to hire someone separately.

Cooperative flat? Talk to the association

In a cooperative flat, you often need permission from the housing cooperative (BRF) to move pipes or the floor drain. Check the statutes before the work starts.

ROT deduction

Bathroom renovations qualify for the ROT deduction on the labour cost. As materials often make up a large part of the cost, labour and materials should be listed separately in the quote.

Frequently asked questions

How long does a bathroom renovation take?

A full renovation normally takes a few weeks depending on the size, the drying times for the waterproofing and deliveries. Ask for a schedule in the quote.

This information is general and may change. Always check the current rules with the relevant authority, for example Skatteverket, Elsäkerhetsverket or Transportstyrelsen.

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