In brief
In Onex (canton of Geneva), the Federal Register of Buildings and Dwellings lists 42 buildings that are planned or under construction: 13 projected, 0 authorised and 29 under construction. Together they include 97 planned dwellings. As of 11.10.2026.
Buildings planned and under construction
All projects, under construction first, then by number of dwellings.
Frequently asked questions about Onex
How many new-build projects are there in Onex?
In Onex (canton of Geneva), the Federal Register of Buildings and Dwellings lists 42 buildings that are planned or under construction: 13 projected, 0 authorised and 29 under construction. Together they include 97 planned dwellings. As of 11.10.2026.
Where can I find building permit applications in Onex?
Building permit applications from Onex are published in the official gazette of the canton of Geneva or by the municipality. Vorbau doesn’t analyse this canton’s building permit applications yet, but you can see the planned buildings from the building register on the map.
How do I find out about new building projects in Onex?
With an alert on vorbau.ch: draw an area around Onex on the map and you’ll get an email as soon as a building there is newly registered, authorised, started or completed. One alert is free.
Other municipalities in the canton of Geneva
Sources: Federal Statistical Office, Federal Register of Buildings and Dwellings (RBD); cantonal official gazettes via amtsblattportal.ch; SOGC. Planned buildings may change or not go ahead.