Home energy work in Grasse and the inland villages:
heating, heat pumps, solar and electrical
Grasse sits twenty kilometres inland at around 350m. A system up here is chosen for winter heating, and August cooling comes second.
On this page8 sections
- Why does heating matter more than cooling above 350m?
- What replaces an oil boiler in an old Grasse stone house?
- Why a heat pump's headline rating misleads in Gourdon and Cabris
- Does an uninsulated stone house suit a heat pump at all?
- Is solar a better bet inland than on the coast?
- Which grants reach the villages that the coastal schemes miss?
- How far inland from Grasse do we go?
- Oil tanks, frost and pellet stoves: questions from the Grasse hills
Coastal advice assumes you're buying a system mainly to keep cool, and that assumption misleads in the arrière-pays. Cabris sits at around 550m and Saint-Vallier-de-Thiey higher still. The houses are older, heavier and far less insulated than anything on the seafront.
Why does heating matter more than cooling above 350m?
It gets colder as you climb, and the sea that softens coastal winters is too far away to help. Frost comes on some winter nights, and the higher villages get short cold spells below zero. So choose the system for winter heating first and treat summer cooling as a secondary use.
That changes the equipment too. A reversible split sized for coastal cooling will disappoint in a stone house in February. Our guide to heat pumps in Grasse and the arrière-pays goes through sizing for inland winters.
What replaces an oil boiler in an old Grasse stone house?
Oil is more common inland than on the coast, partly because mains gas never reached many of these villages. Since July 2022 a new oil boiler can't legally replace an old one, apart from narrow exceptions. So when the boiler dies, the usual answer is an air-to-water heat pump feeding the existing radiators or underfloor heating.
Whether that works depends on the radiators. Ones sized for a hot boiler may need replacing or adding to before a heat pump runs efficiently, so ask the installer to check them room by room. Where the building or the budget won't stretch that far, a hybrid system keeps a backup for the coldest days. Hybrids with a fossil backup lost MaPrimeRénov' (the state renovation grant) in September 2026, so price one without that grant. MaPrimeRénov' also covers only a principal residence, so a holiday house in the hills gets none of it, whatever you fit. Our heat pump page covers air-to-water systems in more detail.
Why a heat pump's headline rating misleads in Gourdon and Cabris
The SCOP is a seasonal average measured against a standard climate. It's a fair way to compare two machines. It's a poor guide to what one will do at minus five on a January morning in Gourdon.
Ask instead for the maker's figures for heat output at low outdoor temperatures. Most modern units keep running well below zero, but they give out noticeably less heat there, and the sizing has to allow for that.
Does an uninsulated stone house suit a heat pump at all?
Thick stone walls hold warmth well once they're warm. The heat escapes through single glazing, gappy shutters and uninsulated roofs, which is how most unrenovated village houses are.
Size a heat pump against that loss and you get a large, costly machine that's oversized the moment you insulate. If the budget allows, do the insulation and glazing first. If it doesn't, say so to the installer, because the quote should match the building as it is. A better energy rating also helps at resale, and our guide to improving a DPE rating (DPE means energy performance certificate) covers it.
Is solar a better bet inland than on the coast?
Often, for practical reasons. Inland houses are usually detached, with their own roof and no copropriété to vote on it. Plots are big enough for a ground-mounted array where the roof faces the wrong way.
Against that, you use most energy in winter, when the panels produce least. So generation and use match less neatly than they would with a summer cooling load. Figures are in the solar panel cost guide, and solar in Mougins covers the neighbouring commune.
Which grants reach the villages that the coastal schemes miss?
The Département pays a grant to owner-occupiers in rural and mountain communes, and the coastal strip is excluded. It's worth 20% of the work up to 1,600 EUR. There's no income ceiling and no RGE (the state's approved-installer label) requirement, so you can use it on an old stone house without first finding a certified installer willing to drive up. The commune list was fixed by an old council decision and isn't published as a map, so ask the mairie (town hall) whether yours is on it before counting on the money.
The Département's main renovation grant has stricter terms. It's for a principal residence only, needs an RGE-certified contractor, and the work must cut energy use by 35% and reach class D. It pays up to 25,400 EUR, but only the lowest-income households get that much. The Alpes-Maritimes grants guide sets out every band.
How far inland from Grasse do we go?
Grasse, Mougins, Mouans-Sartoux and Peymeinade, and up into the villages at Cabris, Spéracèdes and Saint-Vallier-de-Thiey. Past there the population thins and so does contractor availability, which we explain on areas we cover.
Oil tanks, frost and pellet stoves: questions from the Grasse hills
Do we have to remove the old oil tank when the boiler goes?
The normal expectation is to decommission it, not leave a redundant tank in place. It's specialist work: draining, degassing and cleaning, then lifting it out, or neutralising it in place where a buried tank can't be lifted. It's easy to leave out of a heat pump quote and it isn't a small cost, so ask for it as a separate line.
How does frost affect an outdoor unit at altitude?
Air-source units regularly run in reverse for a short while to clear ice from the outside coil. That's normal and costs a little efficiency each time; inland it just happens more often. Siting matters too. Ask for the unit to be raised off the ground with clear drainage beneath, so meltwater can't freeze under the machine.
Is wood or pellet still worth considering above Grasse?
It's still used inland, and a pellet stove or boiler can suit a house with high heating demand and poor insulation. Neither gets MaPrimeRénov' par geste any more: boilers were dropped in January 2026, and stoves followed in September 2026. CEE (energy-supplier grants) subsidies are now the main help for either. Our wood pellet heating page sets out where it still makes sense.
Will a heat pump cope in a house we only use in summer?
It will, though the case for one weakens. If the house is empty all winter, you're buying mostly for cooling, which is the coastal calculation. What still matters is protecting the plumbing from frost while nobody's there, and our guide to winterising a second home covers that.
More on heating and solar in the Grasse hills
Sources
Official sources for oil boiler and grant rules in the Grasse hills
- Légifrance: décret n° 2022-8 (oil boiler replacement) When an inland oil boiler dies, a new oil boiler can't legally replace it, bar narrow exceptions.
- Légifrance: arrêté of 17 November 2020 on MaPrimeRénov' works, as amended Hybrid heat pumps with a fossil backup stopped qualifying for MaPrimeRénov' in September 2026.
- Légifrance: décret n° 2026-822 Wood and pellet stoves left MaPrimeRénov' par geste in September 2026, after pellet boilers in January.
- Service-Public.fr: MaPrimeRénov' (F35083) The national grant applies to a principal residence only, which rules out most holiday houses in the hills.
Rules checked against these sources in September 2026.