Solar installation in the Canton of AargauNotify, don't apply.

Permit: notification via EVEN

In the Canton of Aargau, sufficiently well-integrated solar systems on roofs in building and agricultural zones do not need a building permit (Art. 18a RPG, § 49a Bauverordnung). You notify the commune council of the system through the cantonal platform EVEN. The criteria in the canton’s solar brochure are: a compact module area, a small distance to the roof surface, not visible above the roof edge, and low reflection. We keep to these rules when planning.

After the notification, a 30-day period starts. If the commune does not order otherwise, we can then start installation. Facade systems can also be built under the notification procedure (Meldeverfahren) if they meet the criteria. A regular building application is needed for systems on heritage-protected buildings, in protection zones and for free-standing systems. For buildings in ISOS-A townscapes, the canton applies particularly strict checks.

Subsidies in the Canton of Aargau

The federal government pays the one-off payment (Einmalvergütung, EIV) through Pronovo. Since 1 April 2025 the base amount no longer applies. Add-on systems under 30 kWp receive CHF 360 per kWp, integrated systems CHF 400 per kWp.

The canton’s 2026 subsidy programme does not support the photovoltaic system directly. It does include a bonus if you insulate the roof or facade at the same time on a building whose building permit dates from before 2000. Per square metre you get an extra CHF 30 for an add-on system on a pitched roof, CHF 100 for in-roof or facade systems and CHF 20 for green flat roofs. The photovoltaic system must cover at least 70% of the roof or facade area, and at least 50% on flat roofs. You must submit the application before building work starts. If you are planning a roof renovation, we are happy to work through the numbers with you.

For tax purposes, the Aargau tax office accepts energy-saving measures as a deduction if they were carried out at least five years after the building was completed.

Grid operator and power price

Aargau has many grid operators. The one serving the most communes is AEW Energie AG (70 communes, 27.9 ct./kWh), followed by Eniwa (15 communes, 27.2 ct.), IBB Strom (26.8 ct.), EWS Energie and Energie Oberes Fricktal. The cantonal median is 27.7 ct./kWh excluding VAT (household category H4, ElCom 2026), which is exactly the Swiss median.

The grid operator pays for the electricity you feed in, and the rate differs from one utility to the next. In the quote we calculate with the tariff of your utility.

Single-family homes in Aargau

Aargau has around 109,000 single-family homes, and about 52% of residential buildings date from before 1980. Many of these roofs are due for renovation. We plan the roof, the solar system and, if needed, a battery storage system as one package, with our own installers.