Did you know Germany has a Garagenverordnung which regulates in detail what you are allowed to do and keep in your own garage? I didn't.

Things illegal to store in garages:
- lawnmowers or other gardening tools
- garden chairs or similar furniture
- sports equipment other than bikes
- household items for storage
- cardboard boxes
- cupboards if they do not contain car related items only
- food and beverages

Using your garage as
- workshop
- for making or rehearsing music or dancing
- parties
- as office or for garage sales