Short Answer
You possess the absolute statutory right to keep standard small caged animals in your rented apartment without notifying your landlord or seeking prior consent.
Animals that reside exclusively within cages, terrariums, or aquariums are legally classified as part of the normal, baseline usage of a residential dwelling.
What Most Expats Don't Realize
You bought a guinea pig and a small cage for your living room, but casually mentioned it to your landlord during a routine property encounter. The landlord tried to leverage a clause in your house rules to demand the immediate disposal of the animal or threaten you with a lease termination. Because you did not realize small caged creatures are legally immunized from landlord interference, you panicked and spent €350 on an emergency lawyer consultation to stop the invalid eviction process.
What To Do
- Open your lease agreement to verify that any pet clauses do not illegally attempt to restrict small animals like hamsters or fish.
- Keep the animal cages meticulously clean to prevent odor emissions from crossing your property boundary into the communal hallway.
- "Kleintiere im Käfig bedürfen keiner Erlaubnis des Vermieters." (Small animals in cages require no permission from the landlord.) — state this statutory rule if the property manager challenges your right to keep a hamster.
The Truth
Germany’s tenancy framework protects the personal freedom of residents by completely exempting non-hazardous small animals from landlord oversight. The system overrides any restrictive house rules automatically, provided the animals do not cause structural property damage or breach local noise ordinances.