Building rights and superstructures as special forms of property acquisition is not just a standard purchase. Before signing, the parties should know which legal requirements apply, which documents are missing and what the contract must regulate expressly.
The central points are term, rent, reversion, land register status and distinction from land ownership. They affect the price, due date, escrow handling and registration in the land register. If they are checked only after signing, the buyer often has less room to negotiate.
The post explains the purchase contract special case and avoids confusing it with building law as a legal field. The concrete contract, the current land register position and the applicable Austrian rules remain decisive.