Heating oil is not banned at federal level in Switzerland. But when your boiler fails, it is not Bern that decides what you may reinstall: it is your canton. And from one canton to the next, replacing one fossil-fuel heating system with another ranges from "subject to conditions" to "plainly banned". An overview.
No federal ban, but strict cantons
At federal level, nothing bans heating oil in 2026. It is the cantonal energy laws — which transpose the MoPEC — that govern replacement. Under the previous model (MoPEC 2014), replacing one fossil-fuel boiler with another generally required covering at least 10 % of demand with renewables or improving the insulation. The MoPEC 2025 tightens the logic: at replacement, you switch to renewable.
Canton-by-canton overview
| Canton | When replacing a fossil-fuel heating system |
|---|---|
| Basel-Landschaft | The strictest: installing oil-fired boilers banned from 2026, even for a straight replacement |
| Basel-Stadt | Installing fossil-fuel heating banned in the event of renovation; a planned phase-out of gas |
| Zurich | A pioneer: new oil-fired boilers effectively banned in existing buildings since 2022 |
| Geneva | Fossil fuels banned in new builds since 2020; replacement with renewables when the system is changed |
| Vaud | A gradual phase-out of fossil fuels through the new law (LVLEne) |
| Bern | A more flexible approach: no abandonment of the gas network, with a targeted transition to renewable gases |
The common foundation: the MoPEC 2025
Whatever the canton, the direction is the same: when a fossil-fuel installation is replaced, the solution that replaces it must be renewable (heat pump, wood, district heating). The detail of the solutions and grants is set out in our guide on replacing a fossil-fuel heating system; the Geneva and Vaud cases are covered in the guides Geneva: IDC and renovation and Vaud: the new energy law.
What to do as replacement approaches
Plan ahead before the breakdown
A boiler that fails in winter leaves little room to manoeuvre. Planning ahead lets you choose the best renewable solution — and put together a subsidy application.
Check the cantonal rule
Depending on your canton, a like-for-like replacement is subject to conditions… or banned. The local rule determines your options.
Estimate the grants
Switching to renewables is subsidised. Estimate your grants with the subsidy calculator before requesting quotes.
Replacing a heating system is also a good moment to look further ahead: if you are eventually considering an extension or an added storey, the sizing of the new system depends on it. Knowing what your plot allows avoids installing equipment today that your plans will make unsuitable tomorrow.