What does it cost to renovate a bathroom in 2026?

In short

• A surface renovation can cost around 30,000-100,000 kr.
• A partial renovation can cost around 100,000-200,000 kr.
• A normal full renovation often costs 250,000-350,000 kr.
• Complex or high-end bathrooms can cost 350,000-500,000 kr or more.
• A small bathroom is not necessarily cheaper, because many of the technical costs are the same.
• A full bathroom renovation usually takes four to six weeks.
• It is sensible to set aside a financial reserve of 10-15 percent.
• Electrical work must be carried out and documented by a registered electrical contractor (registrert elvirksomhet).
• The membrane, drain and concealed pipes should be done by qualified professionals.
• Always ask for a written contract and documentation of the work.

The prices in this article are indicative consumer prices including VAT. You need to obtain a specific quote to know what your bathroom will cost.

What do the different types of bathroom renovation cost?

There is a big difference between replacing the bathroom furniture and stripping the whole bathroom back to the structure. Before you compare prices, you therefore need to know which level of renovation your project belongs to.

The price ranges are meant as an early budget frame. Two bathrooms of the same size can end up with very different prices if one of them has moisture damage, old pipes or a layout that is to be changed.

What do Norwegian price data say?

Byggstart reports that the average price for a full bathroom renovation is around 275,000 kr. The cheapest projects in their database are around 200,000 kr, while the most expensive exceed 500,000 kr.

Mittanbud reports a typical price range of around 150,000-350,000 kr for a bathroom renovation, with a stated average price of around 220,000 kr.

The difference between the figures may be due to, among other things:

When you read price examples, you therefore need to check what is actually included. A low total is worth little if tiles, furniture, waste, project management or necessary technical work come on top.

Bathroom renovation price by size

Size affects the price, but the cost does not necessarily increase in proportion to the number of square metres.

A small bathroom still needs a drain, membrane, ventilation, electrical installation and sanitary fittings. Several trades also have to be coordinated. Small bathrooms therefore often have a higher price per square metre than larger ones.

The figures assume a normal technical build-up. If you are building a bathroom in a room that has not previously been a wet room, the project can become more expensive.

What does it cost to renovate a 3 m² bathroom?

A small bathroom of around three square metres can cost between 200,000 and 300,000 kr to fully renovate.

The price may seem high relative to the size. The reason is that the biggest costs do not disappear even if the floor area is small. The bathroom still needs a plumber, an electrician, a membrane, a drain, ventilation and several visits from tradespeople.

What does it cost to renovate a 5 m² bathroom?

A normal bathroom of around five square metres will often cost between 250,000 and 350,000 kr.

The price usually assumes a normal standard and that the toilet, basin, shower and drain stay in roughly the same place. Moving water and drainage can increase the price considerably.

What does it cost to renovate an 8 m² bathroom?

An eight square metre bathroom can cost between 300,000 and 450,000 kr.

A larger bathroom requires more membrane, tiles, substrate and labour. At the same time, many people choose more products, for example a bathtub, a double basin, a larger shower solution or more storage furniture.

Example budget for a 4 m² bathroom

Byggstart has published a specific price example for a full renovation of a four square metre bathroom at a normal standard.

This is an example, not a standard price. A product purchase of 27,000 kr is relatively modest. If you choose designer furniture, special glass, concealed taps or expensive tiles, the product budget can be considerably higher.

The example also shows why bathroom renovation is costly. The visible interior makes up only a small part of the total price. Pipes, electrics, carpentry, membrane and other technical work account for most of the cost.

What work is included in a full renovation?

A full bathroom renovation usually means that the room is stripped out and rebuilt.

The following work is often included:

Ask the contractor to specify which of these items are included. The term "complete bathroom" is used differently by different suppliers.

What affects the price the most?

1. Moving the drain, toilet and water installations

It is often cheapest to keep the current layout.

Moving the drain, toilet, basin or shower can require new pipe runs, bigger interventions in the floor and coordination with the structure beneath the bathroom. In a flat, the work can also affect fire separations or other residential units.

2. The technical condition of the bathroom

You do not always know what is hiding behind the tiles until the bathroom has been stripped.

Common surprises are:

Ask for the contract to describe how such findings are to be handled. Additional work should not start until you have received a written explanation and price.

3. Materials and furniture

There are tiles, furniture and taps in almost every price range.

You can keep the product budget down with standard products and standard dimensions. The price often rises when you choose:

An inexpensive product is not necessarily a poor choice. Check that the product is documented for use in Norway and is compatible with the rest of the system.

4. Access and logistics

A bathroom in a detached house with easy access can be cheaper to renovate than a bathroom on the fifth floor without a lift.

The price can be affected by:

5. Geographical area

Prices vary between different parts of the country. Areas with a high cost level and high demand for tradespeople can see higher prices.

You should still not choose a tradesperson based on the hourly rate alone. An experienced contractor who plans properly and avoids mistakes can end up cheaper than a provider with a low hourly rate and poor coordination.

6. Contract model

With a turnkey contract (totalentreprise), you usually have one contracting party who organises the different trades. This can make the project easier to manage and give a clearer line of responsibility.

With separate contracts, you enter into separate agreements with the plumber, electrician, carpenter and other trades. You may get more control over the individual prices, but you also take on more responsibility for coordination and progress.

How long does it take to renovate a bathroom?

A normal full renovation often takes four to six weeks from the start of demolition. Planning, site inspection, quotes and ordering products come on top.

The schedule can get longer if the tradespeople find damage, products are delayed or you change the solution after the start.

Drying time is an important part of the work. A very short schedule is not necessarily an advantage if it assumes that products or structures do not get the time they need.

What can you do yourself?

You can reduce the costs by doing some tasks yourself, but your own contribution must be agreed with the contractor before the work starts.

Suitable tasks can be:

Be careful with demolition. You can damage concealed pipes, cables or structures and at the same time make the division of responsibility unclear.

What professionals should handle

The following work should be left to qualified professionals:

The Norwegian Directorate for Civil Protection (DSB) states that changes to the fixed electrical installation must be carried out and documented by a registered electrical contractor. Ask for a declaration of conformity (samsvarserklæring) and check the company in the register of electrical contractors (Elvirksomhetsregisteret).

There is no general legal ban on a private individual installing a membrane, but mistakes can have serious consequences. You can also run into problems with documentation, insurance and selling the home. The membrane and drain should therefore be done by professionals who can document the work.

Do you need to apply to the municipality?

Renovating surfaces and replacing furniture in an existing bathroom does not normally require an application.

A full rehabilitation of a bathroom within the same unit of use (bruksenhet) or fire compartment is also normally exempt from the application requirement. The relevant requirements in the building regulations (TEK17) still apply.

The work can require an application if it:

If you are unsure, you should contact the municipality before the work starts. In housing cooperatives (borettslag) and housing associations (sameier), you must also check the bylaws and internal requirements.

What is the Wet Room Standard (Våtromsnormen)?

The construction industry's wet room standard (Byggebransjens våtromsnorm), often abbreviated to BVN, is a voluntary industry standard. It describes practical solutions for planning and building wet rooms.

TEK17 is the regulation, while the Wet Room Standard is a collection of recommended solutions that can be used to meet the requirements.

If you want the bathroom to be built according to the Wet Room Standard, this should be stated explicitly in the contract. Do not assume it is included just because the contractor has experience with bathrooms.

How to compare quotes

Send the same project description to all the suppliers. That makes it easier to see whether the price differences are due to efficiency, choice of materials or missing cost items.

Check the following:

A quote with a low total can turn out expensive if important items are missing.

Fixed price, price estimate or hourly rate?

Fixed price

A fixed price should normally cover the work described in the contract. Changes, additional orders and unforeseen circumstances can still affect the total if this has been agreed.

Price estimate

The Norwegian Consumer Council (Forbrukerrådet) states that a price estimate normally cannot be exceeded significantly, and in any case not by more than 15 percent, unless otherwise explicitly agreed.

Hourly rate

With hourly work, you pay for the actual time spent and materials. Ask for the expected number of hours, hourly rates for the different trades and routines for reporting.

For a full bathroom renovation, many customers will prefer a fixed price or a detailed price estimate because this gives better control over the total budget.

How you can save money

Keep the current layout

Keeping the drain, toilet, basin and shower in roughly the same place is often the most important way to save.

Choose products before the start

Decide on tiles, furniture, taps and the shower solution early. Missing products can stop progress and create extra work.

Use standard dimensions

Standardised furniture and shower solutions are often cheaper than custom-made products. It also becomes easier to find spare parts later.

Prioritise the technical work

It is easier to replace a mirror than a membrane. Spend the budget on the drain, fall, pipes, electrics, ventilation and documentation before you choose expensive interior.

Get several comparable quotes

Several quotes give better insight into the market price. Make sure the suppliers have priced the same scope.

Avoid changes along the way

A small change can affect several trades. Moving a piece of furniture can, for example, require changes to the pipes, electrics and substrate.

Agree your own contribution in writing

If you are going to demolish, paint or handle waste, responsibility and timing must be agreed before the project starts.

How large a reserve should you have?

As a rule, set aside 10-15 percent of the budget for unforeseen costs.

If you have a budget of 300,000 kr, that means a reserve of 30,000-45,000 kr.

An older bathroom with an unknown history may require a larger reserve. The reserve should be used for genuine surprises, not for cost items the contractor could have clarified in advance.

What documentation should you receive?

The documentation is important in the event of a complaint, an insurance claim and a later sale of the home.

Ask for:

The documents should be stored digitally and follow the home. Check that you have received everything before the final part of the payment is released.

How do you pay safely for the bathroom renovation?

Avoid paying for the whole project in advance.

A payment plan can be tied to documented milestones:

The payment should be traceable, and all changes should be confirmed in writing.

With Fikso, the customer should be able to secure the agreed amount before the work starts. The service provider gets the assurance that the money has been set aside, while the customer keeps control before payment is released. In the event of a documented disagreement, the disputed payment is held while the case is handled.

What do you do if something is wrong?

Report it in writing as soon as possible. Describe the fault specifically and attach photos and a reference to the contract.

The tradesperson should normally be given the opportunity to rectify the defect within a reasonable time.

The Norwegian Consumer Council states that the customer can withhold as much of the payment as it will cost to have the defect rectified. You should not withhold a larger amount than is necessary to secure the claim.

Work on real property normally has a five-year complaint period. You must still complain within a reasonable time after you discovered or should have discovered the fault.

Frequently asked questions

Conclusion

A normal full renovation of a bathroom often costs between 250,000 and 350,000 kr in 2026. A simpler project can be cheaper, while a high standard, hidden damage and a changed layout can push the price above 500,000 kr.

The most important thing is to understand what the quote includes. Compare the scope of work, technical solutions, documentation, schedule and payment plan - not just the total.

Keep the layout if possible, decide on the products early and use qualified professionals for work that will be hidden behind walls and floors. With a written contract, a financial reserve and safe payment, you reduce the risk of costly surprises.

Method and sources

The prices are indicative planning figures based on Norwegian price guides and published market data that were available in August 2026. The prices are rounded and can vary with location, standard, contract model and the technical condition of the bathroom.

Sources: