The capital of the Valais Chablais at the foot of the Dents-du-Midi, Monthey combines an industrial fabric, a retail centre and residential hillsides.
Monthey tracks Valais closely, at CHF 6,000 per m² for a flat. Communes in this band are the easiest to value: enough sales to anchor a price, and no local anomaly pulling the figures around. Paying 9 percent more than the cantonal median buys location, not floor space. The same budget moved to a neighbouring commune would typically add a room, and that is the trade most buyers here have already made. Out of 67 communes measured in Valais, Monthey sits at position 19. The communes immediately above and below are the ones a buyer will actually compare against, far more than the cantonal average.
At CHF 6,600 per m² houses outprice flats in Monthey by 10 percent. The difference is the plot rather than the build: a house sells with land attached, and where there is little left to build on, the land does the pricing. Flat prices in Monthey are up 3.1 percent over twelve months. One year is a short window: measure it against the longer trajectory before you read it as a change of direction.
Against the Monthey district the gap comes to 3 percent. This is the comparison that carries weight for an estimate: communes in one district share a labour market, a transport network and the same pool of buyers. The largest group of homes in Monthey, 25 percent, dates from after 2015, with the rest spread across the other bands. Where stock is this varied, a commune price per m² carries less weight and the comparison has to come down to buildings of the same age.
The average home in Monthey has 3.3 rooms for 92 m². That ratio describes the shape of local demand better than the price does: many small rooms point to family housing, fewer and larger ones to conversions and new build. Half the flats sold in Monthey went above CHF 6,000 per m² and half below, which puts the commune 9 percent from the Valais median. One exceptional sale barely moves a median, and that is why we use it instead of an average. Over 25 years the median moved from CHF 3,800 to CHF 8,400 per m², a change of +121 percent. That is the market, not your property: a flat renovated in the meantime followed a different curve entirely.
Transaction volume in Monthey is high enough that one unusual sale does not distort the medians. That matters, because thin markets are where automated estimates go furthest wrong and where a local opinion earns its keep. If you are weighing a sale in Monthey, the useful question is not the commune price but yours. A few minutes and a handful of characteristics are enough to place your property inside the local range.
Building stock data: Federal Register of Buildings and Dwellings, FSO, updated August 3, 2026
Market data updated on August 24, 2026
A range set against the price levels of your commune and the profile of your property.
Value my property →The median flat in Monthey is priced at CHF 6,000 per m². That puts the commune 9 percent from the Valais median, a gap explained in part by the age of the local stock and in part by how little land is left to build on.
Houses in Monthey are valued around CHF 6,600 per m² of living space. The plot weighs heavily on that figure, so two houses of identical size can be far apart in price if one has land around it and the other has none.
Homes in Monthey average 3.3 rooms, with after 2015 the most common construction period at 25 percent. The mix means condition varies a lot from one building to the next, and condition is what pulls two similar flats apart on price.