A commune of the Trois-Chêne on the French border, Thônex is going through a deep transformation with the large Communaux d'Ambilly district.
The new Belle-Terre district brings significant new supply, a rare thing in the canton, and attracts families and commuters. The older fabric, between the route de Genève and the Arve, mixes small co-ownerships and quiet villa areas that are much valued.
The immediate closeness of the Moillesulaz border crossing and the number 12 tram supports demand. Detached houses, rare on the market, reach firm prices for this part of the left bank.
Over the past 25 years, the price per square metre of a flat in Thônex has gone from around CHF 4 700 to CHF 12 400, a change of +164 %. Over the last twelve months, the trend is +1,1 %.
These figures track the local market over time. They point to a trend, they do not replace the valuation of a specific property, which depends on its condition, its floor and its view.
Market data updated on July 6, 2026
An accurate value, calculated on the real transactions of the neighbourhood.
Value my property →In Thônex, a flat changes hands at around CHF 12 800 per m² at the median, with a common range of CHF 7 500 to CHF 28 800 depending on the neighbourhood, the floor and the condition of the property.
The median price of a house in Thônex is around CHF 13 300 per m² of living space. The plot, the orientation and the year of construction then move that figure noticeably.
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