In-roof solar in the Canton of GraubündenNotify 15 days before

Solar roofs in historic core zones and protected townscapes

In Graubünden, you notify sufficiently well-adapted roof and facade systems to the commune’s building permit authority with a notification form and self-declaration, at the latest 15 days before installation. The form lists in-roof systems as a separate system type. A building permit is needed in protection zones and on cultural and natural monuments of cantonal or national importance. We clarify in advance whether your house is in a village centre or a protection zone, and we prepare the documents.

In the self-declaration, the owner and the installer confirm that the system and its substructure meet the load requirements of SIA standard 261 for snow and wind. For in-roof systems this is especially important, because the modules are part of the roof covering. On pitched roofs this also applies to the snow guards.

Subsidies

For integrated systems, the federal government pays a higher one-off payment (Einmalvergütung, EIV) through Pronovo than for add-on systems. In addition, the canton can subsidise systems with increased winter electricity production. According to the guide, the conditions are a tilt angle of 60 to 90 degrees, at least 3 kWp and an application before construction starts. Raised systems on steep roofs are excluded. We confirm which contribution applies today with the Office for Energy and Transport (Amt für Energie und Verkehr). On tax, the tax administration lists the photovoltaic system among the deductible investments in energy saving and environmental protection, and the costs of a battery storage system are also deductible for existing buildings.

Plan the roof renovation and solar roof together

In Graubünden, 64% of residential buildings date from before 1980. If you are re-covering the roof, it is best to plan underlay, insulation, snow guards and in-roof modules together. The Graubünden building insurance publishes an information sheet on preventing natural hazard damage with solar systems. The hail risk in the canton is low, but snow and wind determine the build-up and fixing.