Short answer
What you need to know first.
Canton Zug does not provide a general flat-rate cantonal grant for a photovoltaic system. However, anyone combining eligible roof or facade insulation with a new full-coverage PV system receives an additional CHF 60 per m². Construction date, U-value, area quota and an application before work starts are among the decisive conditions.
Important
As of 2026, the PV bonus is not a general subsidy for every solar system. Without eligible envelope refurbishment or with less than 50% PV coverage on the insulated roof, there is no entitlement under this Zug measure; the funding conditions applicable at the time of filing are binding.
Decision points
What determines the right path.
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.
Sequence
How the project stays cleanly managed.
- 1
Classify the building and measurerecord 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.
- 2
Design the PV area to meet the funding quotaplan 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.
- 3
Compile funding documents before work beginsthe 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.
- 4
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.
- 5
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.
- 6
Complete settlement on timedocuments must be submitted no later than two years after the funding commitment. An extension is only envisaged through a written, reasoned request.
Checklist
Questions to settle before the quote.
- Check the pre-1 January 2000 construction date and insulation U-value against the funding conditions
- Calculate the 50% roof or 20% facade area required for full-coverage PV
- Submit the quote, area calculation and funding application before construction or installation begins
- Keep the cantonal building-envelope bonus separate from the federal incentive via Pronovo
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.