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19. July 2026

Buying Condominium Ownership: What Buyers Need to Know Before the Notary Appointment

Ratgeber für Immobilieneigentümer und Käufer in der Schweiz – Immobilienberatung in Zürich und Zug

Condominium ownership (Stockwerkeigentum) is the most common form of home ownership for apartments in Switzerland. The legal structure combines sole ownership of your own apartment with co-ownership of the communal areas — a combination that can lead to unpleasant surprises later on without a clear understanding of the underlying documents.

The Condominium Regulations — the Constitution of the Owners' Association

The condominium regulations (or deed of constitution) define what constitutes an exclusive right in each apartment and what belongs to the communal property. They determine the distribution of shares, the voting majorities of the owners' assembly, and the obligations of the owners. Anyone buying a condominium should study the regulations carefully before the notary appointment — in particular the rules on renting out, structural alterations, and keeping pets.

The Renovation Fund — the Community's Liquidity Reserve

A well-managed renovation fund covers foreseeable refurbishments (façade, roof, heating, lift). Rule of thumb: 0.5 to 1 percent of the building's insured value per year. Buyers should check the current fund balance, the contribution level, and the renovation projects approved over the past three years. An empty renovation fund in an older building is a clear warning sign.

Quorum and Majorities

The condominium owners' assembly decides on renovations, amendments to the regulations, and administrative resolutions. The required majorities vary according to the significance of the decision — a simple majority suffices for ordinary administration, while qualified majorities or unanimity are required for far-reaching measures.

Delineation of Exclusive Rights

What is an exclusive right, and what is communal? Windows, balconies, apartment doors, and interior walls are common grey areas. Anyone planning a modification to their apartment should understand the delineation before signing the contract — otherwise a simple window replacement may end up requiring a vote at the owners' assembly.

Common Pitfalls

First: a ban on renting out, or a minimum rent, in the regulations that catches investors off guard later. Second: upcoming major renovations that are not sufficiently covered by the renovation fund. Third: conflicts from old meeting minutes that the seller does not disclose. Experienced broker support identifies these issues early on.

FAQ

A form of ownership that combines sole ownership of an apartment with co-ownership of communal building elements.

The regulations, the renovation fund balance, the minutes of the last three assemblies, and foreseeable renovations.

As a rule yes, provided the regulations do not exclude renting out.

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