On its promontory at the foot of the Jura, Cossonay and its funicular link the historic town with the Venoge plain.
Cossonay tracks Vaud closely, at CHF 8,600 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. Sitting under the Vaud median gives a buyer room, though the discount is rarely free. It usually pays for distance from a station, from the lake, or from a school catchment that people compete over.
Cossonay ranks 71 out of 132 communes in Vaud on flat prices per m². Rankings shift a place or two from one year to the next without anything real changing, so read the band rather than the exact position. Up 2.3 percent in a year, Cossonay has been priced by whoever was willing to pay most for a small number of properties. In a commune with few sales, that is exactly how a median gets moved.
Within the Morges district, Cossonay lands 10 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. No single period defines Cossonay, though before 1919 leads with 21 percent. That mix works in a buyer's favour, since you can choose between period character and low running costs without leaving the commune. The average home in Cossonay has 3.4 rooms for 94 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.
The median flat in Cossonay comes out at CHF 8,600 per m², a gap of 7 percent against the Vaud median. That figure covers every flat sold, whatever the floor, the age of the building or the state of the kitchen. Over 25 years the median moved from CHF 3,800 to CHF 8,500 per m², a change of +124 percent. That is the market, not your property: a flat renovated in the meantime followed a different curve entirely.
Cossonay turns over enough stock to give a reliable read. The practical benefit shows at negotiation, where both sides can point to comparable sales from the same year, which shortens the distance between asking price and signature. Knowing the median in Cossonay gets you halfway. The second half is what separates your property from that median: condition, orientation, outside space, parking, and the works still to be done.
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 Cossonay is priced at CHF 8,600 per m². That puts the commune 7 percent from the Vaud 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.
The reference is CHF 8,600 per m² in Cossonay. It averages a small number of sales, since houses change hands far less often than flats, so treat it as a bracket to work inside rather than as a price.
21 percent of homes in Cossonay date from before 1919. 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.