The need for permission depends on the project, its location and the applicable state rules. Physical size alone is not a reliable test.
Archive article, reviewed and updated on 12 November 2026. The original publication date is retained.
Describe the intended use accurately
New buildings, extensions and changes of use can raise different questions. An exempt procedure does not mean that the project may disregard planning or safety requirements. Check the existing approval before assuming that a new use is already covered.
Organise the application and timetable
Identify the authority, required technical documents and any separate permissions. A preliminary decision can address defined issues, but its scope and duration must be checked. When a decision arrives, record the service date and review its conditions.
Four practical examples
Illustrative scenarios: the appropriate steps depend on the contract, evidence and applicable law. These are not reports of client matters.
A shop becomes a restaurant
Assess occupancy, ventilation, noise and fire-safety implications.
A small extension
Check setbacks and the planning position even if the procedure is simplified.
A listed façade
Coordinate heritage requirements with building approval.
A delayed decision
Review the procedural options instead of assuming silence means approval.
Further guidance
Legal framework & further reading
Reviewed: 12 November 2026. Statutory references are to German law unless stated otherwise.