Background
#The PV bonus for roof renovation in Canton Zug is CHF 60 per m² when eligible thermal insulation is implemented at the same time as a new full-coverage photovoltaic system.
The standard case is an existing building with a legally binding building permit dated before 1 January 2000; on a roof, PV must cover at least 50% of the insulated area. For facades, the threshold is 20%, and a standalone PV system without eligible envelope refurbishment does not trigger this cantonal bonus. The funding application, including the quote and area evidence, must be submitted to the Zug portal before construction or installation begins. The federal one-time payment via Pronovo must be assessed separately.
What counts for funding
#The bonus is tied to building-envelope refurbishment, not to a standalone PV system. Canton Zug pays CHF 60 per m² of thermally insulated building element plus CHF 60 per m² as a PV bonus for eligible insulation. A system without simultaneously subsidised insulation does not fall under this measure.
The layout must genuinely be full coverage. The 2026 funding conditions define this as at least 50% of the thermally insulated flat or pitched roof area; for a facade, at least 20% is sufficient. Module planning and the insulated reference area must therefore be calculated together.
The construction date limits the standard case. For the insulation measure, Canton Zug requires a legally binding building permit issued before 1 January 2000. For new buildings or properties approved later, this funding path cannot simply be transferred and must be checked separately before planning.
Technical evidence determines whether the insulation is eligible. The programme specifies a U-value of no more than 0.15 W/(m²K) for roofs and no more than 0.20 W/(m²K) for other elements facing outdoor climate or up to 2 m below ground. An improvement of at least 0.07 W/(m²K) is also required.
Timing is binding: the funding application must be submitted before construction or installation begins. If the owner starts work after filing but before the funding commitment, the funding conditions place the risk on the owner that requirements may not be met and no payment may be made.
From a CHF 10,000 funding contribution, the insulation measure requires a GEAK Plus or an eligible building analysis. The minimum grant is CHF 3,000 per application. These thresholds belong in the preliminary assessment before the roof build-up, PV layout and quote are finalised.
The process in six steps
#Tick off for your project
Classify the building and measure
record the legally binding building-permit date, building element, current and planned U-value, and the insulated roof or facade area. This first establishes whether the insulation falls under the Zug measure at all.
Design the PV area to meet the funding quota
plan new PV modules across at least 50% of an insulated roof and at least 20% of an insulated facade. Reconcile the area calculation with the plan and quote before ordering the system.
Compile funding documents before work begins
the Zug portal requires the signed application form and the relevant attachments. For insulation, these notably include the quote, plans, area evidence and proof of the U-value.
Submit the application through the Building Programme portal and wait for the funding commitment. Implementation before commitment is not prohibited, but is expressly at the owner’s risk; where documents are missing or incomplete, the application is treated as not submitted.
Carry out insulation and PV according to the submitted plan and document the execution. For payment, the processing office checks the completion form, invoices, photos and other required evidence; changes from the application should be clarified in advance.
Complete settlement on time
documents must be submitted no later than two years after the funding commitment. An extension is only envisaged through a written, reasoned request.
Checked for your roof, not just read up on
Once the framing is clear, a property-specific check with roof, grid and documentation is worthwhile.
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.