Background
#In Canton Thurgau, the first question for a solar system is not only how many modules fit on the roof. The key issue is which procedure applies to the specific building: many sufficiently adapted roof systems can use the notification procedure, while systems on cultural or natural monuments, certain facade solutions, sensitive design situations or larger technical interventions may require a permit or deeper clarification.
Thurgau’s solar map and cantonal legal basis support the pre-check, but do not replace property-specific assessment by the municipality, specialist planning and grid operator.
For your roof
What fits on your roof?
Enter your address to see roof area, yield and a guide price from federal data. We then clarify notification or permit with your municipality.
Free and non-binding · no unsolicited calls
Rather talk directly? +41 78 615 90 58
What applies in the canton of Thurgau
#The property status comes first. Article 18a of the Spatial Planning Act privileges sufficiently adapted solar systems on roofs, but excludes cultural and natural monuments of cantonal or national importance. Thurgau provides open data showing where heritage objects may be affected and which procedure can apply depending on the system.
Notification and building permit are construction-law questions, not electrical commissioning. Even if construction law only requires notification, grid operators require technical documents for generation systems connected to the low-voltage grid. ESTI also points to initial inspection, safety verification and acceptance inspection.
System size and integration affect the process. Cantonal law mentions simplified treatment for small solar systems in building zones if no relevant protected object is affected. For standard roofs this can simplify the process considerably; visible, large or insufficiently adapted systems still need review.
Facade and special systems must not be treated like normal roof-mounted systems. Facade PV, systems in sensitive townscapes, work zones, agricultural buildings or combinations with roof renovation can trigger different documents, design requirements or responsibilities.
Incentives are a separate layer. Pronovo supports photovoltaics across Switzerland through one-time payments; Swissolar refers to KLEIV, GREIV and HEIV as well as the tariff calculator and PV directive. This incentive logic does not replace the Thurgau procedure check or grid-operator release.
The process in five steps
#Tick off for your project
Classify the building
check location, municipality, zone, roof or facade system, visibility, size, existing roof use and possible cultural or natural monument entries. Thurgau’s solar map or open data basis is a sensible starting point.
Determine the construction-law route
if the system is sufficiently adapted and no protected object is affected, notification may be sufficient. For protected buildings, facade systems, unclear integration or combinations with other construction work, the municipality should be involved before quoting.
Prepare the technical project
document module layout, mounting structure, roof membrane protection, cable routing, inverter location, fire-safety interfaces and grid connection point so municipality, grid operator and installation team use the same basis.
Start grid-operator and electrical process
before execution, clarify required technical notices, installation notice, metering concept and connection conditions with the responsible distribution grid operator. After installation, initial inspection, safety verification and, where required, acceptance inspection belong in the schedule.
Complete incentives and handover
prepare Pronovo application, system data, certification, guarantees of origin, photos, diagrams and measurement protocols consistently. Only when procedure, grid release and documentation fit together is the system ready for clean handover.
Checked for your roof, not just read up on
What fits on your roof?
Enter your address to see roof area, yield and a guide price from federal data. We then clarify notification or permit with your municipality.
Free and non-binding · no unsolicited calls
Rather talk directly? +41 78 615 90 58
Frequently asked questions
#Sources
#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.