Monthey is a town in the Valais Chablais, at the mouth of the Val d’Illiez. Its major chemical site, its town centre, its residential districts and the nearby mountains make for a varied building stock, and so for work of every kind. On SOS Travaux, you describe your project online; the request is passed on to tradespeople and firms in the region, who contact you to prepare a free quote without obligation.
Monthey’s buildings: town centre, residential districts and mountains
Monthey is not a resort village. It is a town on the plain, with a centre where apartment blocks, shops and homes sit side by side, and residential districts with detached houses and small apartment buildings. This mosaic means buildings from several generations, and so very different needs from one address to the next: ageing plumbing or electrics in an older block, an envelope that needs better insulation in a more recent house, a roof to inspect after a few decades.
The nearby mountains matter too. At the exit of the Val d’Illiez, the districts that climb towards the slopes do not experience the same conditions as those on the valley floor: exposure to wind, rain and snow depends on altitude and orientation. For the canton, the climate is that of a dry, sunny Rhône valley, hot in summer, while the side valleys and the resorts are colder and snowier. Monthey lies where these two worlds meet, which shows on the facades, the roofs and the windows.
The presence of a major chemical site makes Monthey an industrial town as much as a residential one. For your work, this changes little in practice, but it explains the variety of districts: business areas, homes close to the centre, quieter areas on the outskirts.
The work that comes up most in Monthey, and why
Jobs are not spread at random. Here are those most naturally found in a town like Monthey.
- Roofing and insulation. With a hot summer on the plain and neighbouring mountains that bring cold and precipitation, the roof and the attic work hard. A tired or poorly insulated roof costs comfort in summer and winter alike.
- Heating and heat pumps. Many owners wonder about replacing an old boiler. The choice depends on the building, its insulation and the distribution system in place.
- Air conditioning. Under a dry, hot summer climate, the question of keeping a home cool arises, particularly for attics and south-facing rooms.
- Solar panels. The sunshine of the Rhône valley prompts people to look at generating electricity on their roof, provided the roof and its orientation are suitable.
- Windows. Replacing old glazing improves insulation and reduces draughts, especially in homes exposed to the wind.
- Bathrooms and kitchens. Bathrooms and kitchens age with use: plumbing, tiling, electrics and joinery are often combined in a single job.
Permits and energy in Monthey: what Valais provides
For work that changes the appearance or volume of a building, the canton’s rule is as follows: within the building zone, the building permit is issued by the commune; outside the building zone, it falls to a cantonal commission. For Monthey, the first step is therefore to contact the relevant department of the commune, which will tell you whether your project needs a permit and which documents to provide. Routine maintenance work does not necessarily need an application, but this should always be checked before starting.
On energy, the canton has a service for energy and hydropower and a cantonal subsidy programme. If you are considering a heat pump, insulation or other energy renovation work, ask that service about the conditions in force and when to submit an application, before signing anything.
Chalets and second homes are subject to special rules: the federal law on second homes applies in the communes concerned. If your property falls into this category, check with the commune what applies to your situation.
Requesting a quote in Monthey and comparing offers
The simplest way is to use the form to request a quote. The more precise your description, the more comparable the offers will be. State the type of work, the address or district, the approximate age of the building, your timing constraints and whether you are an owner, tenant, co-owner or the representative of a small business.
Once you have the quotes, compare them point by point:
- Is the work described identical from one offer to another?
- Are the materials and brands stated?
- Are labour, equipment, waste removal and making good included or excluded?
- Is the proposed schedule in writing?
- Are the payment terms clear?
The cost of a job varies with the condition of the building, access to the site, the scale of the work and the level of finish chosen. That is why no serious figure can be given without a visit or a detailed description: the quote is the only reliable basis. If a job affects the common parts of a building, inform the co-ownership or the property manager before signing.
Trades for your work in Monthey
Each trade has a dedicated page for Monthey.
Water, electricity and heating
For plumbing installations, leaks or replacing appliances, see the plumber in Monthey. Panels, sockets, lighting and bringing installations up to standard fall to the electrician in Monthey. Replacing a boiler or renovating a heating circuit is prepared with a heating engineer in Monthey, and moving to a renewable electric solution with a heat pump in Monthey.
Building envelope
Roofing in Monthey covers maintenance, repair and renewal of the roof covering. Thermal insulation in Monthey limits heat loss, and windows and double glazing in Monthey complete the comfort improvements. For walls, slabs and load-bearing structures, turn to masonry in Monthey.
Interiors and finishes
Rooms to renovate have their page with kitchen renovation in Monthey and bathroom renovation in Monthey. For floors and walls, see tiling in Monthey; for surfaces to freshen up, interior painting in Monthey; and for doors, staircases or made-to-measure fittings, the carpenter in Monthey.
Comfort and energy
Air conditioning in Monthey answers the hot summers of the plain, and solar panels in Monthey let you look at generating electricity on your roof.
Monthey in the canton of Valais
Monthey is part of Valais, whose rules on permits, energy and second homes apply to your project. For an overview of the work and the specific features of the canton, see the page on the canton of Valais.
Updated 29 October 2026