The property is legally independent of the developer.
No, a developer sells a house + property in one contract. Ownership and possession only transfer to the buyer after completion and payment of the entire package. Until then, the buyer does not even have the right to go to the construction site. I am always talking about the buyer here, not the builder or homeowner. Therefore, there is also a large installment payment right at the beginning, since the share of the property is included in the first payment. It is different if you buy the property yourself and then commission a general contractor/general contractor (GU/GÜ). Then you build a house on your own property (or have it built). The payment plans are different there and are not regulated according to the mandatory requirements of the Real Estate Agent and Developer Ordinance. You no longer have to pay the GU/GÜ for the property. Thus, you may officially access your own property or construction site. This is constantly confused, but it is extremely important for contract design, rights, etc., as there are major differences.