As the building owner, you must submit the building application with the required building documents to the building supervisory authority in whose area the property is located.
The building supervisory authority will check whether the building documents are complete. If the building application cannot be processed due to missing documents, it may be rejected. Individual building documents can be requested subsequently.
If the building documents are complete, the building supervisory authority (with the involvement of the municipality and specialist departments) will check whether the building project is contrary to public law regulations. Once all comments have been received and the building application has been reviewed, the building supervisory authority will inform you of its decision digitally via the building portal or in analog form:
- the building permit is granted,
- only granted with certain requirements and conditions or
- the building application is rejected.

You may only start work on the project once you have received the building permit.

A building permit issued is valid for 3 years. If building work is not carried out until a later date, an extension of the building permit must be applied for in writing before the deadline expires. This also applies if construction work has been interrupted for more than one year.

The duration of the procedure depends on the individual case, in particular on which offices need to be involved and whether all the necessary documents are complete.