Example
What does it look like in practice?
A notarial deed may transfer an apartment together with "basement No. 7, measuring 4.20 sq m". If the offer promises storage room No. 7 but it is missing from the project or title document, a handover record cannot create a property right to it.
A storage unit with its own identifier must be assessed separately.
What is it commonly confused with?
Adjacent, common, and detached are different categories. The locking of a premises and its exclusive use does not prove separate ownership, and the inclusion of its area in an advertising "total area" does not automatically indicate how it is transferred.
Don't assume that a basement or attic can always be sold separately from the home.
Why does it matter?
For the buyer, the attached parts are often a material part of the price and daily use. A vague description can lead to missing premises, dispute over number or boundaries, impossibility of separate disposal and discrepancy between contract and deed.
A bank or prospective buyer may also require clearly traceable ownership of the underlying object.
What to ask
What should you check next?
Compare the description in the offer, architectural design, cadastral scheme and draft deed. Record the number, location, area, boundaries and legal status: appurtenant unit, self-contained unit, common area or allocated use.
When handing over, check the physical premises, but do not use only the key as proof of the acquired right.