The form worth 20'000 francs — and why it has to be filed before the work starts
In short
Energy renovation subsidies Switzerland are paid through the Buildings Programme, co-funded by the Confederation but administered canton by canton: thermal insulation up to ~120 CHF/m², heat pump ~4'000 to 9'000 CHF, GEAK/CECB Plus ~1'000 to 1'500 CHF, whole-renovation bonus ~90 to 130 CHF/m². The application must be filed and approved before work begins, otherwise it is refused. Amounts differ substantially between cantons and must be confirmed with the cantonal energy office before you commit to anything.
An owner has the façade insulated in March, swaps the oil boiler for a heat pump in April, then files the paperwork in May. The canton's answer: refused. Not because the work was badly executed, not because the building was unsuitable — but because the application arrived after the first blow of the pickaxe. Roughly 20'000 francs lost on a question of timing.
The scenario repeats every year in every canton. The money is there: the Buildings Programme is funded by a share of the redistributed CO2 levy and covers a substantial part of a serious renovation. You simply have to know what falls inside the scope, what does not, and in which order things must happen.
What the Buildings Programme actually pays for
The logic of the programme is physical before it is financial: it funds what durably reduces the building's heat demand, or what replaces a fossil energy source with a renewable one. A new bathroom, a kitchen, a floor or a façade that is merely repainted fall under neither axis and attract nothing at all, even inside an otherwise very ambitious project.
Façade, roof, walls and slabs against ground or unheated space. Order of magnitude: roughly 40 to 120 CHF per m² of insulated surface, depending on canton and building element. A target U-value is imposed.
Around 4'000 to 6'500 CHF depending on output and canton. The subsidy requires the actual removal of an oil boiler, a gas boiler or direct electric heating.
Around 6'500 to 9'000 CHF. The higher amount reflects the higher drilling investment, but the annual efficiency is markedly better.
Energy certificate with an advisory report and costed renovation variants: around 1'000 CHF for a single dwelling and 1'500 CHF for other building categories. In most cantons restricted to buildings constructed before 2000.
Around 90 to 130 CHF per m² of energy reference area, depending on the size of the energy-class jump achieved. It is the largest line in a well-built application, and the one most often forgotten.
Up to around 4'000 CHF for a single dwelling and 8'000 CHF for other categories, to fund professional project support by a consultant listed by the canton.
Energy renovation subsidies Switzerland: a federal frame, cantonal rates
This is the point almost everyone gets wrong. The Buildings Programme is co-funded by the Confederation but administered canton by canton. Each canton sets its own rates, eligibility conditions, forms, processing times and sometimes its own additional measures. The same project will therefore not yield the same sum in Zurich, Bern, Geneva or Bellinzona.
Vaud, for instance, pays noticeably more than Neuchâtel on thermal insulation, where the rate sits closer to 60 CHF/m². Geneva ties certain grants to a prior energy audit. German-speaking cantons frequently require a GEAK Plus as soon as the requested contribution reaches 10'000 francs. None of the figures quoted here should be carried straight into a budget: they are national orders of magnitude, to be confirmed with the cantonal energy office before filing. Rates are also revised each 1 January, sometimes downwards when the cantonal envelope was heavily drawn on the previous year.
Order of magnitude of 2026 subsidies per measure
The rule that sinks the most applications
An application filed after work has started is normally refused, with no room for negotiation. The principle is the same everywhere: the subsidy is meant to trigger an investment decision, not to reward one already taken. In practice, no subsidised component may be ordered, delivered or installed before the canton's written award decision — and in several cantons, signing the contractor's agreement already counts as starting work.
- Commission the CECB Plus or GEAK Plus first: it forms the basis of the application and is itself subsidised.
- File the application on the cantonal portal with detailed quotes, drawings and exact surfaces per element.
- Wait for the written award decision: usually four to twelve weeks depending on canton and season.
- Only then: sign the contractor agreements and start on site.
- Respect the completion deadline stated in the decision, often two years, or the award lapses.
- Submit the final statement with paid invoices and photographs: payment follows only after verification.
Planning a renovation and unsure in which order the application has to go in? Let us talk before the first quote is signed. Compare architects in your canton
Why replacing windows alone is not subsidised
This is the most frequent disappointment. Replacing windows on its own generally attracts no subsidy under the Buildings Programme. The reason is technical: very airtight new windows fitted into an uninsulated façade shift the dew point and concentrate thermal bridges around the reveals, with a condensation and mould risk the programme does not want to encourage. The real energy gain is also modest relative to the cost.
Windows become fundable again when they form part of a whole-envelope renovation: insulating the façade and roof, then replacing the joinery in the same project. They are then counted indirectly, through the whole-renovation bonus and the energy-class jump they help achieve. A few cantons still run a specific grant for very high-performance windows, but this is the exception and must be checked case by case.
The whole-renovation bonus changes the arithmetic
The difference between a stack of isolated measures and a coordinated renovation is not only about comfort. A project split into three phases over eight years costs more in scaffolding, site set-up and repeated studies, and it forfeits the bonus that rewards the energy-class jump. On a house of 180 m² energy reference area, that bonus alone is in the order of 16'000 to 23'000 francs.
- Each measure is funded at its own rate, with no leverage effect.
- No whole-renovation bonus: the energy-class jump is never reached.
- Scaffolding, site installation and fees paid several times over.
- Risk of measures working against each other: an oversized heat pump installed before insulation.
- Three applications, three processing delays, three final statements.
- Per-measure grants stack with the bonus tied to the class jump.
- One application, one award decision, one final statement.
- Heat pump sized after insulation, so smaller and cheaper.
- Fixed site costs shared across the whole scope of works.
- Property value and energy class documented by an updated certificate.
The second window: tax deductibility
Subsidies are not the only lever. In most cantons and at federal level, investments aimed at saving energy and using renewable sources on an existing property are deductible from taxable income, frequently at 100 % of the amount spent, whereas a purely cosmetic renovation is not. Since 2020, when the cost of works exceeds taxable income for the year, the balance can be carried forward over the two following tax periods, which makes a large project absorbable without losing the deduction. One caveat: subsidies received are deducted from the deductible base, so the same franc cannot be claimed twice. Cantonal rules differ in the detail, and confirmation with the cantonal tax administration remains essential.
The right reflex is not to ask how much you can collect, but to build the project in the order the canton expects. An application filed three months too late costs more than any technical option.
The payback, without optimism
On an uninsulated 1970s detached house, a full envelope renovation with replacement of the fossil heating frequently lands between 180'000 and 320'000 francs depending on building geometry and canton. Subsidies typically cover 15 to 30 % of that amount, and the tax deduction recovers a further share depending on the owner's marginal rate. Heat consumption falls by roughly 50 to 70 % when envelope and heat generation are addressed together.
- Payback on energy savings alone: commonly 15 to 25 years, rarely less.
- Payback measured on the unsubsidised share and after the tax effect: closer to 10 to 18 years.
- Gain in property value and saleability: hard to quantify, but real with a documented energy class.
- Risk of doing nothing: cantonal rules on replacing end-of-life fossil heating keep tightening.
- Budget reserve to plan for: 10 to 20 % of the works, with observed overruns between 15 and 25 %.
Two points of method prevent nasty surprises. First, an asbestos survey is mandatory before any work on a building constructed or altered before 1991: a late discovery derails programme and budget within days. Second, interior-architect or consultant fees run between 15 and 22 % of the works value on a renovation, or between 120 and 300 CHF per hour; the SIA fee scale has not been binding since 2020 and the spread between offers is wide. Part of those fees can be covered by the owner's-representative grant when the consultant is accredited by the canton.
Let us run the numbers before you sign anything
AC Design supports owners across French- and German-speaking Switzerland in coordinating an energy renovation: sequence of steps, costing, subsidy application and site supervision. Get in touch for a first assessment of your building.
Describe my projectFAQ
Yes, the two mechanisms are independent. However, the subsidies received are deducted from the tax-deductible base: only the net cost you actually bear can be claimed. The details vary by canton, so check with your cantonal tax administration.
The application is normally refused. The Buildings Programme requires the file to be submitted and the award decision issued before work begins. In several cantons, signing the contractor agreement or ordering the equipment already counts as starting work.
On its own, generally not. Windows become fundable when they form part of a whole-envelope renovation, where they contribute to the energy-class jump and therefore to the whole-renovation bonus of around 90 to 130 CHF per m² of energy reference area.
Expect four to twelve weeks depending on the canton and the seasonal workload of the energy office. Payment comes much later, after the work is completed and the final statement is submitted with paid invoices and photographs.
Not systematically for a single measure, but it becomes mandatory in several cantons once the requested contribution passes a threshold, often 10'000 francs, and it is always required for the whole-renovation bonus. It is itself subsidised at around 1'000 CHF for a single dwelling and 1'500 CHF for other categories.