You do not have to switch off a running oil heating – the obligation takes effect at the moment of replacement. Then most German-speaking Swiss cantons require a renewable system, in the Canton of Zurich mandatory since September 2022. In practice, this almost always means a heat pump. For the complete change including dismantling, the guideline values are in the range of the heat pump reference values plus a separate item for boiler and tank removal. (As of: August 2026)
Key points in brief
- Continuing to operate is allowed, replacing triggers the obligation – whoever waits until the boiler stands still decides under time pressure.
- In the Canton of Zurich, the obligation for a renewable heating system has applied since 1 September 2022, with a narrow exception via life cycle costs (Details in the Energy Act article).
- Realistic alternatives: heat pump, district heating (where available), wood/pellets – the order results from the location, not from taste.
- The tank is the most frequently forgotten item: decommissioning or removal costs money, but brings back space.
- The cantonal contributions in 2026 for an air-water heat pump range from CHF 2,900 (Zurich) to CHF 8,500 (Zug); Thurgau only provides incentives for geothermal probes.
- Incentive application before start of construction – whoever orders first and then applies loses the contribution.
Do I have to replace my oil heating at all?
In short: not as long as it is running. No German-speaking Swiss canton forces you to decommission a functioning oil heating. What is regulated is the moment of replacement – and there the rule is clear: the new heat generator must be renewable, in the Canton of Zurich without a transition period since 1 September 2022. Fossil remains only for those who prove that it is not technically possible or causes more than five percent additional costs over the life cycle – and this proof is narrower than it sounds. The rules, the official calculation tool and the responsibility of the municipality are described in the article Energy Act Zurich on heating replacement; similar rules apply in other cantons, the details differ.
This results in a practical consequence that is more important than any discussion of deadlines: the timing belongs to you – until it does not anymore. Whoever plans the replacement while the old heating is still running can compare quotes, cleanly apply for the incentives and build in summer. Whoever waits until the boiler drops out in January negotiates under time pressure, pays a provisional arrangement if necessary and takes what is available.
As a rule of thumb from practice: from around fifteen years of operation, replacement belongs on the agenda, from twenty in concrete planning. Not because the boiler will break down then, but because you have to expect a failure from then on and planning takes several months.
Which system takes the place of the oil heating?
| Replacement system | Fits if … | Read more |
|---|---|---|
| Air-to-water heat pump | Location for outdoor unit available, sound clearances can be complied with | Air-water or brine-water |
| Brine-to-water heat pump (ground probe) | Drilling permitted and space available, high efficiency desired | Ground-source heat pump |
| District heating | Connection in the neighbourhood available or planned | District heating or heat pump? |
| Pellet/wood heating | Storage room available, heat pump difficult | Heat pump or pellet? |
| Hybrid solution | Special case, rarely the first choice | Hybrid heating |
Overview, as of: August 2026. Which solution is permitted and sensible is decided on the building – the decisive factors are the cantonal specifications and the heating load calculation.
In the Zurich region, the vast majority of oil heating replacements end up with an air-water heat pump. This is not a question of fashion: it does not need a drilling permit, storage room or connection to the district heating network – the three conditions on which the alternatives usually fail.
The classic objection concerns the old building with radiators: «Is that enough on the cold days?» In many houses, the answer is now yes – today's devices reach the necessary flow temperatures significantly better than previous generations, partly because of the refrigerant (Propane heat pumps). Honest remains nevertheless: there are houses where individual radiators or the building envelope are up first. When this is the case is clarified in the article Heat pump in the old building – and in case of doubt the heating load calculation, not gut feeling.
What does the switch from oil to a heat pump cost?
The usual reference values apply to the new system: SFOE states CHF 45,000 to 60,000 for a single-family home for a complete air-water system and CHF 55,000 to 80,000 for a brine-water system including drilling – in each case before incentives and including battery and hydraulics. The derivation and the items behind it are in the article Heat pump costs Switzerland.
When replacing an oil heating, two items are added that are not explicitly included in these reference values:
Dismantling of the boiler. Disassembly and disposal of the old system, including chimney connection and any adjustments in the boiler room.
Decommissioning or removal of the tank. Here the early decision is worthwhile. A steel tank in the basement can be cleaned and decommissioned or completely removed; additional requirements apply to underground tanks. Residual oil must be disposed of professionally, and depending on the canton and tank size, decommissioning is subject to the notification procedure. The effort depends so heavily on design, size and accessibility that a general figure would be misleading – have this item shown separately in the quote.
The equivalent value is often overlooked: after removal, the tank room is free. In many houses, this creates an additional basement room – and the periodic tank revision, which oil operators know, is omitted without replacement.
On the credit side are also the incentives. The switch from fossil heating to a heat pump is supported in all German-speaking Swiss cantons, but the approaches differ significantly. The overview is in Heat pump incentives Switzerland, the Zurich figures in the article Heat pump incentives Canton of Zurich. The order is more important than the amount: the application must be submitted before work begins – otherwise the contribution is gone, regardless of how eligible the system would be.
What incentives are there when replacing the oil heating?
The replacement of an oil, gas or electric heating system with a heat pump is subsidised in all German-speaking Swiss cantons – not a new building and not the exchange of an old heat pump. The approaches differ widely: for an air-water heat pump in a single-family home, they range in 2026 from no contribution (Thurgau) through CHF 2,900 (Zurich) to CHF 8,500 (Zug); geothermal probes are subsidised significantly higher everywhere.
| Canton | Air-to-water heat pump | Geothermal probe (brine-water) | What you should also know | Details |
|---|---|---|---|---|
| Zurich | CHF 2,900 (up to 15 kW, above that +CHF 160 per kW) | CHF 6,800 (up to 15 kW, above that +CHF 420 per kW) | Obligation for renewable system on replacement since 1.9.2022 | Heat Pump Zurich |
| Aargau | CHF 3,000 + CHF 60 per kW | CHF 6,000 + CHF 180 per kW | Heating replacement subject to notification procedure since 1.4.2025; no incentives in network areas | Heat Pump Aargau |
| Zug | CHF 8,500 (up to 30 kW) | CHF 20,000 + CHF 400 per kW | 20 percent rule since 1.2.2024, building notification before replacement | Heat Pump Zug |
| Thurgau | no more contribution | CHF 9,000 (single-/two-family home) | +CHF 7,000 when combined with a solar power system | Heat Pump Thurgau |
| Schaffhausen | CHF 3,000 – in a single-/two-family home only with solar power system (min. 30 W/m²) | CHF 10,000 | Additional solar power contribution when combined | Heat Pump Schaffhausen |
| Schwyz | CHF 3,200 + CHF 120 per kW | CHF 4,800 + CHF 360 per kW | no obligation to replace oil and gas heating | Heat Pump Schwyz |
Cantonal incentive programmes 2026 for systems up to 70 kW, as of: August 2026. The approaches are adjusted annually; the current publications of the cantonal energy agencies are decisive. Contributions from individual municipalities are partly added.
Two rules apply everywhere: the application must be submitted before start of construction, and in Zug and Thurgau the contribution is limited to 50 percent of the total investment. Whoever is thinking about the roof anyway should check the combination – Thurgau and Schaffhausen explicitly link contributions to a solar power system. The national overview is provided by Heat pump incentives Switzerland, the Zurich details by the article Heat pump incentives Canton of Zurich.
Replacing oil heating in Aargau or in the Canton of Zurich: what is different
Aargau. Since 1 April 2025, every replacement of the heat generator is subject to the notification procedure – the notification runs with the proof EN-103-AG via the digital energy enforcement of the canton. Whoever switches to a heat pump fulfills the requirements automatically; whoever wants to heat with fossil fuels again must prove via an annual cost comparison that no renewable solution is economically viable. Air-water heat pumps within the building zone can usually be realised in the notification procedure, provided the noise protection proof is available. In network areas with district heating, the heat pump is fundamentally not subsidised. Approaches, notification procedure and process: Heat pump Aargau.
Canton of Zurich. Here the obligation for a renewable system on replacement applies since 1 September 2022; fossil remains only for those who provide proof of the life cycle costs (more than 5 percent additional costs) – the assessment is made by the municipality. The canton pays a flat rate of CHF 2,900 in 2026 for an air-water heat pump up to 15 kW, and many systems now run in the notification procedure instead of the building application process. What that means for your house: Heat pump Zurich – and for the legal situation Energy Act Zurich on heating replacement.
How long does the replacement take – and when do you start?
The construction part itself is short: dismantling and installation are completed in a single-family home in a few working days, and the hot water supply is only briefly shut down. Everything before that is long. Site visit, quotes, incentive application, possible permit and notification procedure add up to several months in a relaxed order. The complete process with timeline is described in the article Heating replacement: process in 7 steps.
From this follows the only timing advice we give without restriction: plan in spring for summer. In summer, the heating is off anyway, the companies are better available, and a failure during the construction period affects no one.
Whoever is thinking about the heating anyway should look at the roof at the same time. Heat pump and solar system fit together because the power requirement of the heat pump rises exactly when a system on the roof delivers surpluses over the year – how much this pays off and where the limits are is in the article Combining heat pump with photovoltaics. And if the scaffolding for the roof work is up anyway, it is the cheapest moment for it.
The calls for oil heating replacement come in two waves, and you can recognise them by the tone. One comes in spring, calm, with the question «How do we approach this?» – this turns into a project with quote comparison, clean incentive application and construction time in July. The other comes in January, and the first sentence is «The boiler is out». Then it is primarily about warmth, not efficiency, and decisions are made in days instead of weeks. Technically, both cases can be solved; economically, they are two different projects. What we therefore most often advise owners is banal and is still rarely followed: do the site visit while the old heating is still running. And plan the tank at the same time – hardly anyone has it in mind at the first discussion, and almost everyone is happy about the free space afterwards.
Frequently asked questions
Do I have to replace my oil heating in Switzerland?
Not as long as it works – there is no operating ban for existing systems. The obligation takes effect upon replacement: then most cantons require a renewable system. In the Canton of Zurich, this has applied since 1 September 2022, with a narrow exception via life cycle costs.
May I swap oil for oil?
Only in exceptional cases and with proof. In the Canton of Zurich, you must prove that a renewable system is technically not possible or causes more than five percent additional costs over the life cycle – and even then an efficiency hurdle applies to the building in addition. The assessment is made by the municipality.
What does it cost to replace an oil heating with a heat pump?
Reference values of CHF 45,000 to 60,000 (air-water) or CHF 55,000 to 80,000 (geothermal probe incl. drilling) apply to the new system, before incentives. Added to this are dismantling of the boiler and decommissioning or removal of the tank as separate items. The individual quote is binding.
What happens to the oil tank?
It is cleaned and decommissioned or removed; residual oil goes into professional disposal, and depending on the canton and tank size, decommissioning is subject to the notification procedure. The effort depends heavily on design and accessibility – have the item shown individually in the quote. In return, the tank room becomes free and the periodic tank revision is omitted.
Does a heat pump work in an old building with radiators?
In many cases yes. Today's devices reach the necessary flow temperatures significantly better than previous generations. Whether it is enough in your house is shown by the heating load calculation – and in individual cases, swapping individual radiators is the cheaper way than a larger device.
When should I start planning?
About half a year before the desired construction date, ideally in spring for summer. Quotes, incentive application and notification procedure together take several months – and the incentive application must be submitted before start of construction.
Free initial consultation
Oil heating at the end? We look at the house before it gets urgent.
Site visit, heating load, location for the outdoor unit, tank question and incentives – you receive a quote with individually shown items. Free of charge and without obligation.
Prefer to talk? +41 78 830 83 35
Swissolar-certified specialist company · ESTI installation authorisation (Art. 14 NIV) · in Zurich since 2017 · over 150 systems completed · a personal answer from the specialist company, no call centre
Sources: Cantonal Energy Act Zurich (§ 11 EnerG, in force since 1.9.2022) according to the canton's publication, SFOE reference values for total heat pump costs, cantonal incentive programmes 2026, ecoEn project experience.
Last updated: 9 July 2026 · Author: ecoEn editorial team
