Does a bathroom renovation need a permit in Western Switzerland?

It depends on the project and the canton. Simply replacing fittings like for like rarely raises questions, but work affecting the facade, a window, the structure or a protected building may require a permit. Check with your commune or the competent cantonal office before starting.

Which trades work on a bathroom?

Most often a plumber, a tiler and an electrician, sometimes a mason, a plasterer-painter or a carpenter for the furniture. Depending on the company you contact, a single point of contact may coordinate everything, or each trade is hired separately.

Can I renovate my bathroom if I am a tenant?

You need the written consent of the landlord or the property manager before undertaking work that changes the dwelling. Without it, you risk difficulties at the move-out inspection. Also ask who bears the costs.

Why does a bathroom quote vary so much from one project to another?

The price depends on the floor area, the condition of the pipes and substrates, the amount of waterproofing to redo, the choice of fittings and finishes, and site access. Only a detailed quote, drawn up after looking at your situation, allows a sound comparison.

How long does the company remain liable for defects?

For work on an immovable structure, the Code of Obligations (CO) provides a period of five years under art. 371 CO, and two years for movable work. If your contract refers to the SIA 118 standard (the Swiss Society of Engineers and Architects' general conditions for construction work), it applies in addition. Read the contract again and keep your documents.

How can I adapt a bathroom to stay at home as I grow older?

Common solutions are a walk-in shower instead of a bath, grab rails fixed to reinforced supports, a non-slip floor and enough room to move around. Mention this when you request a quote, as it affects how the work is planned.

Bathroom Renovation in Western Switzerland

Redoing a bathroom means working in the most technical room of the home: water, electricity, ventilation and finishes all meet in a few square metres. Whether you own a house or an apartment, are a co-owner, or are a tenant with the landlord’s consent, the result depends as much on preparation as on the materials chosen.

SOS Travaux is a neutral matching service: you describe your project online, your request is passed on to tradespeople and companies in the region, and they get back to you to prepare a free, no-obligation quote.

What bathroom renovation covers

The term covers very different jobs, from a simple refresh to a complete rebuild of the room. The most common works are:

replacing sanitary fittings: washbasin, vanity unit, WC, taps;
installing a walk-in shower, meaning one at floor level, or replacing a bath with a shower;
replacing or keeping a bath, with its panel and taps;
waterproofing floors and walls exposed to water;
laying tiles on the floor and walls;
ventilating the room, naturally or mechanically;
electrics in a damp area: lighting, sockets, heating appliances or an illuminated mirror;
adapting the room for old age or reduced mobility.

Three trades almost always come into play: the plumber for water supply and drainage, the tiler for finishes and waterproofing, and the electrician for the installations. Depending on the condition of the room, a mason, a plasterer-painter or a carpenter may be added.

When to call a professional for your bathroom

Some jobs remain within a DIY enthusiast’s reach: changing a shower head, replacing a seal, fitting a cabinet. As soon as the project touches pipes, drainage, waterproofing or electrics, it is better to hire professionals. A badly handled leak does not show straight away; it seeps into the slab, the walls or the neighbour below, and the damage sometimes appears long afterwards.

The same goes for electrics. A bathroom is a damp location, and installations there are subject to particular requirements, notably the NIBT rules, the Swiss standard for low-voltage electrical installations. This work should be entrusted to a person authorised to carry it out, not to an amateur.

Also call a professional if tiles are coming loose, if mould keeps coming back despite cleaning, if damp marks the walls or if the room smells musty: the cause is often a waterproofing or ventilation defect, to be dealt with before any new finish.

Bathrooms in Switzerland: trades, CFC and standards

In Switzerland, initial vocational training goes through an apprenticeship and leads to a federal certificate of proficiency (CFC). Several bathroom trades fall under this system, notably plumbing, tiling and electrical installation. A CFC attests to basic training; it does not replace reading the quote or discussing with the company its experience of projects similar to yours.

On the electrical side, the NIBT applies to the room’s installations, with specific rules for damp areas that take account of the proximity of water. Your electrician will know which protections and appliances are permitted near the shower or bath.

For waterproofing and ventilation, ask the company how it plans to protect the substrates, treat corners and pipe penetrations, and how the damp air will be extracted. These points are decided before the tiles are laid, never after.

Bathrooms in apartment buildings: shared risers, neighbours and older buildings

In an apartment, the bathroom is rarely independent of the rest of the building. Water supply and drainage stacks are shared: you cannot move a WC or a shower without checking what the building’s configuration allows. A water shut-off often affects other homes, which means informing the neighbours and the property manager or caretaker. Noise and working hours must also respect the building’s house rules.

In older buildings, opening up a bathroom sometimes holds surprises: old pipework, uneven substrates, a slab or floor to redo, missing ventilation ducts. A sound quote allows for this uncertainty, for example by stating what is planned if a defect appears once the room is opened up.

If you are a tenant, do not start anything without the written consent of the landlord or the property manager, and clarify who pays for what. Routine maintenance and alterations do not follow the same logic, and a misunderstanding is better settled before the work than after.

Permits and energy in the cantons of Western Switzerland

An interior renovation with no change to the structure or outward appearance does not always need a permit, but the rule varies from one canton and commune to another. If in doubt, ask your commune or the competent cantonal office before signing anything.

Geneva: building permits are issued by the canton, through the Office des autorisations de construire. Energy falls under the cantonal energy law (LEn) and the cantonal energy office (OCEN), on which the Buildings Programme subsidies depend. Many rental buildings are managed by property managers, and the old town as well as some districts are protected.
Vaud: the building permit is issued by the municipality, with the file going through the cantonal permit centre (CAMAC) when cantonal services must give an opinion. Energy depends on the Vaud energy law and the cantonal energy directorate, which runs a subsidy programme. Old towns and the Lavaux vineyards, a World Heritage site, call for particular attention.
Valais: the building permit is issued by the commune within the building zone, and by a cantonal commission outside it. The cantonal energy and hydropower service runs a subsidy programme. Chalets and second homes are common, and the federal law on second homes applies in the communes concerned.
Fribourg: applications are filed through the cantonal FRIAC platform, with the permit issued by the prefecture or the commune depending on the type of work. The cantonal energy service offers a subsidy programme. The canton is bilingual and has protected old towns.
Neuchâtel: applications go through the cantonal SATAC one-stop shop, with the decision taken by the commune. The energy and environment service runs a subsidy programme. The watchmaking heritage of La Chaux-de-Fonds and Le Locle is listed by UNESCO.
Jura: the permit is issued by the commune or by the canton depending on the scale of the project. The cantonal energy section offers a subsidy programme. Delémont, Porrentruy and Saint-Ursanne have old towns to preserve.
Biel/Bienne (canton of Bern): the permit is issued by the commune or the prefecture depending on the project, and the cantonal office for the environment and energy runs a subsidy programme. Biel/Bienne is officially bilingual, French and German.

If your bathroom goes with other work (replacing a water heater, insulation, windows), find out about subsidies before ordering: they are generally granted only if the application comes before the start of the work.

Preparing your bathroom quote request

The more precise your description, the more comparable the quotes will be. Gather these details before filling in the form:

the type of home and the floor, with or without a lift for site access;
the approximate age of the building and the known condition of the pipes;
the dimensions of the room and whether there is a window or ventilation;
what you want: walk-in shower, bath kept, fittings moved;
your accessibility needs, if the room is to be used over the long term;
your status: owner, co-owner or tenant, and the landlord’s consent where applicable;
photos of the current room, useful for the tradesperson to prepare before the visit.

A site visit is almost always necessary for a reliable quote: the tradesperson needs to see the condition of the substrates, the access and the constraints of the building.

What a bathroom renovation quote should detail

A sound quote is not just a total. It describes:

the removal and disposal of the old elements, including waste disposal;
the breakdown of work by trade: plumbing, masonry, waterproofing, tiling, electrics, painting;
the fittings and finishes planned, with their references or range level;
what is included and what is not: supplies, protection of common areas, final cleaning;
the planned schedule, the payment terms and how an unforeseen problem will be handled;
how the trades are coordinated.

What makes the cost vary from one project to another: the floor area, the condition of the substrates and pipes, the complexity of the waterproofing, whether fittings are moved, the choice of equipment and tiles, the difficulty of access, the number of trades involved and the extent of the finishing. For this reason, compare quotes that describe the same scope rather than isolated totals.

Company liability: what the Code of Obligations says

The contract for work is governed by the Code of Obligations. For defects in an immovable structure, art. 371 CO provides a five-year period; for movable work, it is two years. A bathroom built into the building falls in principle into the first category, but the classification of a specific element can be debated.

If your contract refers to the SIA 118 standard, its rules apply in addition to the Code of Obligations. So check what the contract says before signing, and keep quotes, invoices, plans and written exchanges. In the event of a visible defect, report it in writing without delay rather than waiting for the periods to run out.

Request a quote for your bathroom

Once your project is defined, even roughly, requesting a quote takes a few minutes. Your request is passed on to tradespeople and companies in the region, and they get back to you to prepare a free, no-obligation quote. You remain free to compare, to ask questions and to decline.

Bathroom renovation near you

Find the pages dedicated to your town or city:

For the rules specific to your region, also see the canton pages: canton of Geneva, canton of Vaud, canton of Valais, canton of Fribourg, canton of Neuchâtel, canton of Jura and canton of Bern.

Updated 29 October 2026