Condominium ownership or co-ownership – what is the difference?

Your co-pilot in real estate law
Mag. Nevena Shotekova-Zöchling
Attorney in Vienna · 16 years of legal practice · Real estate law & purchase contracts
You keep the controls and make the decisions. We sit next to you in the cockpit, know the route and the instruments – and when it gets turbulent, we take over.
Listings often just say “flat for sale”. Legally, however, it makes a big difference whether you acquire condominium ownership (Wohnungseigentum) or merely a co-ownership share in a building.
Condominium ownership (Wohnungseigentum)
Under the Condominium Act (WEG 2002) you acquire a co-ownership share in the property that is inseparably linked to the exclusive right to use and dispose of a specific flat. It is based on a usable-value report and the condominium agreement; the land register records the condominium right with your share.
- You can sell, let, mortgage and bequeath your flat on your own.
- Banks finance condominium flats without difficulty.
- Common parts (staircase, roof, façade) are managed by the owners’ association.
Plain co-ownership (schlichtes Miteigentum)
With plain co-ownership you own an ideal share of the whole building. Who uses which flat follows only from a use agreement between the co-owners.
- Each co-owner can in principle demand the dissolution of the co-ownership – in the extreme case by court auction of the whole building (partition action).
- A use agreement should be noted in the land register so that it also binds buyers.
- Financing and resale are often harder, which is why prices tend to be lower.
Special case: owner partnership
Two natural persons – such as a couple – can jointly acquire condominium ownership of one flat (Eigentümerpartnerschaft). Each holds half and they can generally sell or mortgage their shares only together.
What to check when buying
- Land register extract: has condominium ownership already been established?
- New builds or loft conversions: is only a “prospective condominium owner” recorded? Special protective rules then apply.
- Co-ownership: is a use agreement noted? Has a waiver of partition been agreed?
- Condominium agreement, usable-value report, reserve fund and minutes of owners’ meetings.
Frequently asked questions
Is every “owned flat” condominium ownership?
No. Colloquially, a co-ownership share in a building is often also called an owned flat. What counts is the land register.
Can co-ownership be converted into condominium ownership?
Yes, if all co-owners cooperate and a usable-value report is prepared. It takes time and money but usually increases the value.
What is a partition action?
It allows a co-owner to demand the dissolution of the co-ownership. If physical division is not possible, the property is auctioned and the proceeds are divided.
Can I get a mortgage for plain co-ownership?
Often only with difficulty or on worse terms, because the bank does not receive a clearly defined unit as security.
Mag. Nevena Shotekova-Zöchling, attorney and insolvency administrator in Vienna. As of October 2026. General information – not legal advice for your individual case.
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