Short answer
What you need to know first.
For PV systems in Schaffhausen, notification 30 days before construction usually suffices if the system is sufficiently adapted under Art. 32a RPV. A building permit is required for protected objects, ISOS preservation objective A, cantonal townscapes, free-standing systems or designs that are not adapted.
Important
As of 2026, this classification applies to solar systems in Canton Schaffhausen under the cantonal guideline of December 2025. The municipality, approved zoning plans and legally valid inventories decide bindingly; for protected objects or protected zones, the 30-day notification does not replace a building permit.
Decision points
What determines the right path.
The first factor is the 30-day deadline: under the Schaffhausen guideline, the notification form must be submitted to the building authority of the municipality 30 days before construction starts. Within this period, the authority checks whether notification is permitted or a building-permit procedure is required.
For pitched roofs, Art. 32a para. 1 RPV is decisive: the system may project no more than 20 cm beyond the roof plane at a right angle, may not extend beyond the roof when viewed from above, must use low-reflection execution and must be arranged compactly. If one of these requirements is missing, the case leaves the simple notification route.
Flat roofs use their own values under Art. 32a RPV: the solar system may project no more than 1 m above the top edge of the roof parapet and must be set back far enough that it is not visible from below at a 45-degree viewing angle. This setback belongs in the roof plan before module layout.
Protection status is the main exception driver: Art. 18a para. 3 RPG always requires a building permit for solar systems on cultural or natural monuments of cantonal or national importance. The Schaffhausen guideline also names ISOS areas with preservation objective A, cantonal townscapes, BLN natural monuments and municipal inventories and registers.
The zone affects design tolerance: in industrial and commercial zones in Canton Schaffhausen, solar systems are subject to notification under Art. 54 BauG even if they are not sufficiently adapted. In building and agricultural zones, by contrast, sufficient adaptation carries the permit exemption.
The documents decide whether the start runs smoothly: for notification, the guideline requires the notification form and a site plan showing the solar system, each submitted in duplicate; notifications for permit-exempt systems are free of charge. In the building-permit procedure, roof plan, eaves facade, product description, snow guards, chimneys, vents and dummy modules are added.
Sequence
How the project stays cleanly managed.
- 1
Check the plot via the procedure mapopen the solar-system procedure map in the Schaffhausen geoportal and select the plot. The map indicates the likely notification or permit route; approved zoning plans and inventories remain legally binding.
- 2
Define roof type and adaptation under Art. 32a RPVfor pitched roofs, document the 20 cm limit, roof edges, low-reflection execution and compact arrangement. For flat roofs, include the 1 m maximum height, 45-degree visibility and setback in the same preliminary plan.
- 3
Clarify protection and townscape statuscheck ISOS preservation objective A, cantonal townscapes, municipal inventories, VKD entries of the City of Schaffhausen and BLN references before fixing the quote. For cultural monuments, the Energy and Design expert team may be involved.
- 4
Submit notification documentsfile the notification form and site plan showing the system in duplicate with the municipal building authority. The City of Schaffhausen also states that its notification form must be submitted no later than 30 days before construction starts.
- 5
Wait for the authority decisionthe municipality confirms receipt and processing deadline, checks the planned system and involves cantonal specialist offices if needed. If the system is sufficiently adapted and no public interests oppose it, execution can start after the processing period expires.
- 6
Prepare a complete building application if a permit is requiredthe guideline then requires, among other items, a site plan at 1:500 scale, roof plan, eaves facade, product description, information on snow guards, vent pipes, chimneys and any dummy modules. These documents should be consistent before modules are ordered.
- 7
Separate planning law from grid and insuranceafter planning-law clearance come grid connection, metering, safety verification and feed-in with EKS. The Schaffhausen notification form also recommends notifying the Office for Property Valuation so building-insurance cover is clarified.
Checklist
Questions to settle before the quote.
- Plan the 30-day notification to the municipal building authority before construction starts
- Check Art. 32a RPV: 20 cm on pitched roofs and 1 m maximum height on flat roofs
- Clarify ISOS preservation objective A, cantonal townscapes and protected objects via the Schaffhausen geoportal
- Prepare notification, EKS grid process and building insurance as separate workstreams
FAQ
Common questions on this topic.
Sources
Official sources & references.
The responsible authorities are decisive. Always verify binding details – amounts, deadlines and conditions – for your specific property against the current status of the respective authority.
- Schaffhausen solar-system guideline 2025Canton Schaffhausen Building Department
- City Schaffhausen solar-system notification formCity Schaffhausen Building Police
- EKS guarantees of origin factsheet 2026Elektrizitätswerk des Kantons Schaffhausen AG
- Spatial Planning Act Art. 18aSwiss Confederation (Fedlex)