Our areas · Onex

Apartments for sale in Onex

In Onex, the median price per m² of apartments is CHF 12'500 (Millenium Properties estimate, November 2026; data of 12 November 2026). Looking for an apartment to buy in Onex? Our real estate agency offers an exclusive selection of apartments in Onex. Also discover our off-market properties. Contact us. Refine your search by your criteria to find the ideal apartment in Onex.

Price per m² in Onex

  • Houses · median price per m² CHF 13'300
    • +3.0% over 1 year
  • Apartments · median price per m² CHF 12'500
    • +3.0% over 1 year
  • Change over 10 years +32.1%

Millenium Properties estimate Period: November 2026 Data as of 12 November 2026

Price per m² estimated by Millenium Properties from the municipality's market: medians rounded to the hundred.

These figures describe the market of the municipality. They do not replace a valuation of your property: your adviser takes its condition, its location and its strengths into account.

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Apartments for sale in Onex

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Buying an apartment in Onex: your trusted agency

Are you considering buying an apartment in Onex? Millenium Properties supports your purchase in this dynamic municipality on the outskirts of Geneva. Our local expertise allows us to offer you a carefully targeted selection of properties that match your criteria, in a town valued for its balance between green spaces and urban amenities.

Buying an apartment in Onex: our tailored support

Our personalised approach begins with a thorough analysis of your needs and aspirations. Whether you are drawn to the charm of Vieil Onex and its houses of character, the modernity of the residential areas of Onex-Cité, or the tranquillity of the areas along the Rhône, we identify the opportunities that match your expectations exactly. Buying an apartment in Onex is a sound investment in a municipality that combines accessibility and quality of life.

Our team guides you through each stage of your purchase:

  • Careful preselection of properties according to your specific criteria
  • Viewings arranged to suit your schedule
  • Detailed assessment of each property and its potential
  • Expertise in financing and tax optimisation
  • Full support until the transaction is completed

Buying an apartment in Onex: why choose our agency?

Millenium Properties stands out for its in-depth knowledge of the Onex market and its close relationships with local stakeholders, giving you access to exclusive properties, often before they are officially marketed. Our knowledge of the municipality allows us to identify the best opportunities, whether a family apartment close to schools, a home overlooking the parc des Evaux or an exceptional property in a quiet setting.

Our added value lies particularly in securing and optimising your purchase. We rigorously examine all technical and legal aspects of the properties offered, anticipate potential constraints and advise you on the long-term value of your investment. Our commitment goes beyond the transaction itself: we remain available to help you settle into the municipality and to advise you on all practical aspects of your new life in Onex.

Whether you are looking for a main residence well connected to central Geneva or an investment in a constantly evolving municipality, our team puts its expertise at your service to complete your apartment purchase in Onex on the best possible terms.

Owners

What is your property in Onex worth today?

An adviser studies your property, its municipality and the Geneva market, then gives you a detailed, evidence-based valuation. Free of charge, with no commitment, within 24 to 48 hours.

Your agency

Millenium Properties, in Geneva

An independent Geneva agency covering the whole canton: one adviser per client, an answer within 24 to 48 hours.

Millenium Properties SA

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