According to the building and dwelling statistics (GWS) of the Federal Statistical Office, published on 15 September 2026, one in four Swiss buildings had a heat pump installed in 2025 – a proportion that has grown sixfold since 2000. For newly constructed buildings in the last ten years, the proportion is three quarters. (As of: FSO publication from 15 September 2026)
Key points in brief
- The source is the official building and dwelling statistics (GWS) of the Federal Statistical Office (FSO).
- In 2025, 25 % of all Swiss buildings were equipped with a heat pump – six times more than in the year 2000.
- For new buildings in the last ten years, the proportion is around 75 %.
- Oil (33 %) and gas heating systems (17 %) are still more common in terms of the building stock, but are in decline – the heat pump is the fastest-growing type of heating.
What exactly do the FSO building and dwelling statistics show?
The GWS is the official survey by the Federal Statistical Office on the entire Swiss building stock, including the type of heating installed in each case. The edition published on 15 September 2026 shows for 2025: a heat pump was installed in every fourth building in Switzerland – a proportion that has grown sixfold since the year 2000.
How does the proportion differ by building type?
| Observation | Proportion with heat pump | Source |
|---|---|---|
| All buildings (existing stock) | 25 % | FSO GWS 2025 |
| New buildings in the last 10 years | around 75 % | FSO GWS 2025 |
| Single-family homes | around 30 % | FSO GWS 2025 |
| Households (counted instead of buildings) | 22 % live in a building with a heat pump | FSO GWS 2025 |
| Oil heating systems (comparison value) | 33 % | FSO GWS 2025 |
| Gas heating systems (comparison value) | 17 % | FSO GWS 2025 |
Source: Federal Statistical Office (FSO), building and dwelling statistics, published 15 September 2026.
What does this mean for heating replacement in existing buildings?
With 33% oil heating systems and 17% gas heating systems, there remains great potential for a heating replacement in the existing building stock. The FSO figures only show the stock at a single point in time, not a forecast – how quickly this stock is actually converted depends on factors such as cantonal replacement obligations, incentive programmes and individual renovation cycles.
The difference between the new build and existing stock rates aligns with our experience: in new build projects, the heat pump is practically a given today, whereas in existing buildings, the replacement decision usually only arises when the existing system reaches the end of its lifespan.
Frequently asked questions
How many Swiss buildings have a heat pump?
According to the 2025 FSO building and housing statistics, around 25% of all buildings – for new builds over the last ten years, the share is around 75%.
Is the heat pump the most widespread heating system in Switzerland?
Measured against the entire building stock, not yet: oil heating systems (33%) remain more common. However, the heat pump is the fastest-growing heating type.
Why does the share differ between buildings and households?
Because larger buildings count more households, but only one heating system each. The FSO therefore reports both perspectives separately.
How often does the FSO update these statistics?
The building and housing statistics are published annually; the values shown here come from the edition published on 15 September 2026.
Replace oil heating and combine it with solar power?
We advise on the interaction of heat pump and photovoltaics – independent of manufacturers and tailored to your building.
Sources: Federal Statistical Office (FSO), Building and Housing Statistics (GWS), published 15 September 2026.
Last updated: 18 September 2026 · Contact for questions on methodology: ecoEn editorial team
