Energy efficiency has become the decisive value driver for Swiss properties. Studies show that buildings rated GEAK class A or B achieve prices 5-8% higher than comparable properties with a poor energy performance. And the trend is accelerating.
What is the GEAK?
The Cantonal Building Energy Certificate (GEAK) is the official Swiss assessment system for the energy efficiency of buildings. It rates two dimensions on a scale from A (very efficient) to G (very inefficient):
- Building envelope efficiency: How good is the thermal insulation (insulation, windows, roof)?
- Overall energy efficiency: How much energy does the building consume in total (heating, hot water, electricity)?
In several cantons the GEAK is already mandatory when selling — and the trend is rising. The GEAK Plus additionally includes concrete renovation proposals with a cost-benefit analysis.
Minergie, Minergie-P, Minergie-A: the differences
| Standard | Requirement | Heating energy demand | Price premium |
|---|---|---|---|
| Minergie | Comfort ventilation, good insulation | max. 38 kWh/m² | +3-5% |
| Minergie-P | Passive-house standard | max. 30 kWh/m² | +5-8% |
| Minergie-A | Zero energy (own production) | 0 kWh/m² (net) | +8-12% |
| Minergie-ECO | Additionally: healthy building, embodied energy | depending on base | +2-4% additional |
Impact on property value
The price differences are measurable and increase year on year:
- GEAK A/B vs. E/F: +5-8% premium (source: Wüest Partner, IAZI)
- Minergie label: +3-5% over conventional new-build
- Oil heating (built before 2000): -5-10% discount — rising tendency
- Heat pump/solar: +2-4% over gas heating
Practical example: A villa in Küsnacht (built in 1985, GEAK E) was upgraded to GEAK B after an energy renovation. Investment: CHF 180'000. Estimated increase in value: CHF 250'000-350'000.
Cantonal subsidy programmes
Every canton offers its own subsidy programmes for energy renovations. The most important:
- Buildings Programme (national): CHF 2'000-10'000 for insulation, windows, heating replacement
- Canton of Zurich: Up to CHF 30'000 for heating replacement (oil → heat pump)
- Canton of Zug: Up to CHF 20'000 plus an interest-free loan for Minergie renovation
- Canton of Lucerne: CHF 5'000-15'000 for GEAK Plus advice + implementation
- Canton of Schwyz: CHF 40/m² for facade insulation, CHF 50/m² for roof insulation
Important: subsidy applications must be submitted before construction begins. Retroactive applications are rejected.
When does an energy renovation pay off?
A renovation pays off when:
- GEAK class D or worse
- Oil heating older than 15 years
- A sale is planned in 2-5 years (increase in value > costs)
- Windows older than 25 years (single or double glazing)
- High ancillary costs (>CHF 4/m² per month for heating)
A renovation is questionable when:
- GEAK B or better — marginal additional benefit
- Demolition and new-build planned
- Heritage protection with strong restrictions (→ Heritage protection article)
Tax benefits of renovations
Energy renovation costs are tax-deductible in all cantons — as value-preserving investments:
- Insulation, window replacement, heating replacement: 100% deductible
- Solar panels and heat pump: 100% deductible
- Spreading over 2-3 tax years is possible (tax optimisation)
→ More on this: 8 strategies to save on taxes
Checklist: energy efficiency when buying property
- Request a GEAK certificate (or have one produced, CHF 500-1'500)
- Check the heating type and age
- Request the annual energy costs of the last 3 years
- Ask about the insulation standard (year of construction, renovations)
- Clarify the subsidy potential (before signing the contract)
- Factor renovation costs into the purchase price negotiation
Valuation with energy analysis
We take the energy condition into account in every property valuation — free of charge and without obligation.
Request a valuationAs of April 2026. All information is without obligation. Subsidy contributions change annually — check current amounts at energiefranken.ch.