The short answer is: Theoretically, yes, but practically almost never without a permit. If you simply grab a power drill and install glass panels on the balustrade yourself, you risk hefty fines and forced demolition (illegal construction).
The legal reality behind this glass oasis of well-being depends on three major hurdles:
- The Building Authority (Public Building Law)
Balcony glazing is almost always considered a structural alteration to the building envelope.
Permit Requirement: In most German states and Swiss cantons, you need an official building permit or at least must submit a building notification. The authority will examine aspects such as structural integrity (glass is extremely heavy!), fire safety (escape routes), and compliance with local design regulations.
The rare exception: Extremely lightweight, frameless windbreak systems that can be completely slid away and barely alter the exterior appearance of the house are permitted without a permit in some regions – however, a brief consultation with the local building authority is still mandatory.
- The Owners’ Association (WEG)
If you own a condominium in a multi-unit building, the exterior facade (and therefore also the outside of your balcony) is part of the common property.
Since the reform of the German Condominium Act (WEG), it has become somewhat easier to implement structural changes, but you absolutely need a majority vote at the owners’ meeting.
Simply starting is taboo. If the neighbors object to the inconsistent look or fear a decrease in the property’s value, the glass will have to be removed.
- The Rental Agreement
As a tenant, you have absolutely no chance without the landlord’s written permission. Glazing significantly alters the building’s structure. If you implement such a project without prior consultation, you risk a warning or, in the worst case, eviction.
Conclusion: Anyone wanting to upgrade their balcony to a conservatory must first obtain approval from the landlord/homeowners’ association and then from the building authority. Only once both documents are signed should a contractor be hired.