1. Temporary Provisions: Used when modifications are time-limited or have a specific duration

2. Consideration: Required when the modification involves changes to rent or other financial terms

3. Statutory Notices: Include when specific notices are required under German law, such as for rent increases or modernization measures

4. Utilities and Services: Used when modifications affect service charges, heating costs, or utility arrangements

5. Construction/Renovation Terms: Include when the addendum relates to property modifications or renovations

6. Early Termination Rights: Used when the modifications affect termination provisions

7. Acknowledgment of Receipt: Include when German law requires proof of delivery for specific types of changes

1. Schedule of Modifications: Detailed listing of all changes being made to specific clauses in the original agreement

2. Rent Calculation Schedule: Required when rent modifications are involved, showing the calculation method and new amounts

3. Floor Plans: Include when modifications involve changes to the rented space or common areas

4. Modernization Cost Allocation: Required when modifications involve modernization measures and their cost distribution

5. Photographic Documentation: Used when modifications relate to physical changes in the property

6. Energy Certificate Updates: Include when modifications affect energy efficiency ratings or requirements