Sondereigentum
Individual Condo Property. The part of a condominium you own outright: the flat's interior spaces and non-structural components. Everything structural or shared is Gemeinschaftseigentum.
The boundary decides who pays: interior surfaces, non-bearing walls, sanitary fittings and interior doors are yours; the building shell, roof, windows (usually), pipes to the branch point and balcon structures are common property funded by all owners.
The Teilungserklärung can shift some cost burdens (e.g. window replacement) to individual owners: read it, because 'the WEG will pay' is not always true.
Frequently asked questions
What is Sondereigentum?
The part of a condominium you own outright: the interior spaces of the flat and its non-structural components. Everything structural or shared is common property.
Which parts of my apartment are not actually mine?
Load-bearing walls, the roof, the facade, stairwells, pipes and shared installations are common property, even where they run through your flat. That determines who pays when they need repair.
Where is the boundary between individual and common property defined?
In the Teilungserklärung, the notarised declaration of division. It is the document that states precisely what you own, what is shared, and your cost and voting shares.