On the east side of the Val d'Hérens, Saint-Martin is a cluster of hillside villages including Suen, Eison, Trogne and Liez, looking across the Borgne towards Hérémence.
Flats in Saint-Martin trade around CHF 4,100 per m², under the cantonal level. Cheaper communes tend to have wider spreads between streets, so a single average tells you less here than it would in a tighter market. Prices below the cantonal level move later and less than the top of the market. In practice a correction in Valais reaches communes like this one with a delay, and so does a recovery.
Position 97 of 119 in Valais puts Saint-Martin among communes with similar price levels and often very different housing stock. Two communes can share a rank and still value the same flat differently once age and condition are taken in. A house in Saint-Martin is valued around CHF 6,000 per m² against CHF 4,100 for a flat, a gap of 46 percent. Land is what separates the two figures, and the scarcer the building plots, the wider that gap runs.
Flat prices in Saint-Martin are up 4.4 percent over twelve months. One year is a short window, so measure it against the longer trajectory before you read it as a change of direction. Within the District d'Hérens district, Saint-Martin lands 21 percent from the local median. A cantonal average mixes city and countryside, so it flatters some communes and penalises others. The district figure removes most of that distortion. The largest group of homes in Saint-Martin, 32 percent, dates from 1961-1970, 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.
Average size in Saint-Martin is 89 m² across 3.7 rooms. Compare your own property with that figure before you read any price per square metre, because an outsized home rarely sells at the local rate and a small one often beats it. CHF 4,100 per m² is the working reference for a flat in Saint-Martin, 21 percent from Valais. Take it as a starting point. In a commune this size, the spread between the cheapest and the dearest street is often wider than the gap to the canton.
From CHF 4,300 to CHF 10,100 per square metre in 25 years, +135 percent in all. The path was not a straight line, and the flat or falling stretches inside it are precisely what a long average hides. Enough properties change hands in Saint-Martin each year to keep the price data steady. Estimates land in a narrower range here, and a valuation can lean on recent comparable sales instead of falling back on the cantonal average. Lower prices in Saint-Martin do not make a valuation easier. The spread between properties is often wider here than in an expensive commune, which makes the commune average a weak guide to what yours is worth.
Building stock from the Federal Register of Buildings and Dwellings (FSO), updated October 18, 2026
Market data updated on October 12, 2026
A range set against the price levels of your commune and the profile of your property.
Value my property →The median flat in Saint-Martin is priced at CHF 4,100 per m². That puts the commune 21 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.
Count on roughly CHF 6,000 per m² for a house in Saint-Martin. That rate applies to habitable surface, which leaves out the garage, the cellar and any unconverted attic, all of which add value but never at the same rate.
32 percent of homes in Saint-Martin date from 1961-1970. That age band sets the technical agenda for a buyer here, since insulation, heating system and windows are what decide running costs for the next twenty years.