On the Terre Sainte hillsides above Coppet, Tannay offers villas and views of Lake Geneva.
Buying in Tannay means paying more per square metre than almost anywhere in Vaud: CHF 12,700 for a flat. The gap holds even on older stock, so renovation work rarely comes off the asking price the way it does elsewhere. The premium over Vaud has a practical effect at resale. Buyers arriving from cheaper communes negotiate hard on condition, because they are already stretched on the price per square metre before they walk in. Position 6 of 132 in Vaud puts Tannay 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.
Up 2.8 percent in a year, Tannay 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 Nyon district, Tannay lands 20 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 Tannay, 18 percent, dates from 1971-1980, 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 Tannay is 153 m² across 4.8 rooms. Compare your own property with that figure before you read any price per square metre: an outsized home rarely sells at the local rate, and a small one often beats it.
The median flat in Tannay comes out at CHF 12,700 per m², a gap of 38 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 3,700 to CHF 9,700 per m², a change of +162 percent. That is the market, not your property: a flat renovated in the meantime followed a different curve entirely. Transaction volume in Tannay 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.
The figures above describe Tannay, not your property. At this end of the market the distance between the two is where the negotiation happens, so start from a valuation that takes your own characteristics as its input.
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 →CHF 12,700 per m² is the current median for flats in Tannay. It covers every sale, new and old, so a renovated flat sits above that line and one still needing works sits below it.
Count on roughly CHF 13,000 per m² for a house in Tannay. 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.
The dominant band in Tannay is 1971-1980, which covers 18 percent of homes. Average size runs to 4.8 rooms, so the commune is built mainly for households rather than for single occupants or short stays.