Fire Risk and Débroussaillement in the Riviera Hinterland: The 2026 Buyer's Guide

If a hinterland house sits inside a classified wooded massif or within 200 metres of one, its owner must clear 50 metres around the building every single year, and since 1 January 2025 the seller has to disclose that obligation in the listing itself, not at the compromis. In the Alpes-Maritimes the 50 metres can be pushed to 100 metres where a Plan de Prévention des Risques d'Incendie de Forêt applies, and inside urban zones the rule flips: you clear the whole parcel, built or not, for whatever part of it falls within 200 metres of the massif.

That is the entire mechanism in three sentences, and it catches far more of our eight villages than buyers expect. Biot is more than seventy percent wooded. Roquefort-les-Pins is named for its pines. The olive terraces above Opio, the Aspres side of Biot, the wooded fringes of Mougins-le-Haut and the plots along the RD2085 at Le Rouret all sit in or beside garrigue and pine. A stone house inside the arcades at Valbonne may carry almost no obligation at all. A villa on 4,000 square metres at Les Plans in Roquefort-les-Pins may carry a serious annual bill.

The rules themselves were rewritten recently. The general provisions for the department come from two prefectoral orders, one dated 25 September 2025 and one dated 5 February 2026 amending it. The department republished its OLD zoning file on 21 May 2026 and an updated summary leaflet on 5 June 2026. A ministerial order of 13 April 2026 extended the classified perimeters across 52 departments. None of this changes the arithmetic of a purchase, but it changes what a seller owes you and what a court will do if you were not told.

Our honest read after a year of watching this play out in local files: the obligation is not a reason to avoid a wooded plot, and it is almost never a reason to walk. It is a reason to price the first clearance properly, to read the attestation the seller signs, and to get an insurance quote before the cooling-off period runs out rather than after. Buyers who do those three things stop worrying about it. Buyers who skip them inherit a bill and a neighbour dispute in the same summer.

The single change that matters most to a buyer is that since 1 January 2025 the information acquéreur locataire carries the clearance obligation, which means it has to appear in the advertisement, at the first viewing, in the diagnostic pack, in the compromis and in the acte. Before that, a seller could reasonably plead that nobody had asked. That defence is gone.

Alongside the disclosure rule, the seller of an affected property now signs a sworn statement, an attestation sur l'honneur, confirming that the applicable clearance obligations have been carried out. It is annexed to the promesse or compromis and again to the acte authentique. Read that sentence twice, because it is not a promise about the future. The seller is not undertaking that you will clear the land after completion. The seller is certifying that the work already required has already been done.

At department level, the general provisions were redefined by prefectoral order DDTM-SEAFEN-PFEN-AP number 2025-102 of 25 September 2025, then amended by AP 2026-004 of 5 February 2026. The prefecture reissued the twelve-page illustrated brochure in February 2026, the A4 summary on 5 June 2026, and the OLD zoning dataset on 21 May 2026. At national level, the strategy for defending forests and non-wooded areas against fire was published on 5 June 2025, and a ministerial order of 13 April 2026 classified all or part of the forest areas in 52 departments.

There is also a biodiversity layer that did not exist in the older orders and that changes how the work is done rather than whether it is required. The Alpes-Maritimes text asks for islands of vegetation to be kept, forbids clearing along watercourse banks, and sets specific provisions for two protected species, the nivéole de Nice and the damier de la Succise. The prefecture publishes a density map for both. If your plot falls inside one of those zones, the contractor's method changes, and a contractor who does not know that is the wrong contractor.

The practical consequence for buyers is narrow but real. A seller who marketed a property in 2023 under the old regime and is selling again now is dealing with a different paperwork burden, and a seller who has never cleared the land has a document to sign that they may not be able to sign truthfully. We have seen two sales in the villages slow down for exactly that reason this year.

Clearing is not felling and it is not a clear-cut. The government is explicit on this point, and it matters because the word débroussaillement frightens buyers who have just fallen for a plot precisely because of its trees. The aim is to break the continuity of fuel between the vegetation and the building, not to strip the garden.

The Alpes-Maritimes orders set out the specification in detail. Ground-level brush and grass are removed. Tree crowns are kept at least 3 metres from the house, by felling or by pruning. Lower branches are removed over half the height for trees under 4 metres, and over 2 metres for trees above 4 metres. Shrubs growing under trees are taken out. Hedges are kept more than 3 metres from buildings and held to no more than 2 metres in height and 2 metres in thickness. Cut material must be disposed of lawfully, which in practice means chipping, composting or the déchèterie, and each commune or agglomeration sets its own route for green waste.

On top of the specification there is a housekeeping list that costs nothing and does most of the work: pine needles and leaves out of the gutters and off the roof, the woodpile moved away from the wall, gas bottles and flammable stores relocated, access lanes kept passable for a fire appliance. The national guidance is blunt about why this matters. Around 190 buildings in France were severely damaged or destroyed by forest and vegetation fires in 2025, and 90 percent of houses destroyed in forest fires were either not cleared or badly cleared.

Timing is where owners get caught. The heavy work belongs to autumn and winter, October to February, when the vegetation is dormant, the volume of cuttings is lower and the risk of a spark from your own strimmer is negligible. Spring is for maintenance, regrowth and gutters. Summer is when clearance work using powered tools is frequently prohibited by prefectoral order, which is precisely the moment most new owners first learn of the obligation. If you complete on a house in July, you will very likely be told to wait until October to do the serious work, and you will need to say so to the mairie if anyone asks.

One more detail that saves money in the villages. Where a plot falls inside an espace boisé classé, a 2013 prefectoral order provides an exemption from the usual coupe declaration when the felling is carried out for OLD purposes. Contractors who work the eight communes regularly know this. Contractors who do not will tell you the work is impossible.

The 50-metre radius is measured from your building, so on any plot narrower than 100 metres it will cross a boundary, and the law puts the duty on the owner of the building being defended, not on the owner of the land being cleared. This is the single most common source of friction we see between neighbours in the villages, and it surprises almost every foreign buyer.

The procedure is set out and it is worth following to the letter. Write to the neighbour, by recorded delivery with acknowledgement of receipt, setting out your obligation and the nature of the works required on their parcel. The neighbour may choose to do the work themselves. If they refuse access, or if they simply do not reply within one month of notification, liability for that clearance transfers to them, both administratively and criminally. You then inform the mairie. What you must not do is walk onto the land and start cutting because you believe the law is on your side.

In practice, on the plots at Val de Cuberte, along the pine belt at Roquefort-les-Pins and on the Aspres side of Biot, this often resolves into a shared contractor and a split bill between two or three households. That is the sensible outcome and the one we push clients towards. The alternative is a documented dispute that follows the property to resale and sits in the file for the next buyer to read.

Two situations deserve extra care. First, where the neighbouring parcel is an undeveloped wooded plot held by an absent owner or an indivision after a succession, the recorded letter may take months to reach a decision-maker. Start early, ideally between the compromis and the acte rather than after completion. Second, where the neighbouring land is communal or departmental, as with parcels adjoining the Parc de la Brague at Biot, the interlocutor is the commune or the Conseil Départemental and the timescales are their own.

Ask the seller for any correspondence they have had with neighbours on this subject, and for any mise en demeure they have received from the mairie. A previous formal notice is a material fact about the property. It is also, quietly, one of the better negotiating cards a buyer can hold.

Start with a distinction that gets muddled constantly: damage to a house from a forest fire is paid under the ordinary fire cover in your multirisque habitation, not under the natural catastrophe regime. The CatNat regime is what responds to flood and to drought-driven clay shrinkage. Both matter in the hinterland, but they are separate machinery and conflating them leads buyers to the wrong questions.

That said, the CatNat surcharge is why almost every hinterland owner's premium moved this year. The compulsory surcharge applied to home insurance rose from 12 percent to 20 percent on 1 January 2025, an increase of about two thirds on that component, and 2026 is the first year in which it applies across the whole book because contracts renewing on staggered dates have now all taken the new rate. Reported average home insurance increases for 2026 sit around 13 percent, driven by that surcharge together with claims inflation and repair costs. For scale, the CatNat regime paid out a record €6.5 billion in 2023, and France Assureurs has put annual climate-related claims at around €6 billion a year since 2020.

What this means for a buyer in the eight villages is fairly specific. Get a quote before you commit, not after. Insurers pricing a detached villa in a wooded commune increasingly ask about clearance, access for emergency vehicles, roof material and the distance from the tree line, and the answers move the premium. A property with a documented clearance history and a clean access lane prices differently from an identical house with neither.

Ask the seller for their current premium and their last renewal notice. It is not a document sellers expect to be asked for and it is not one they are obliged to hand over, but when they do it tells you more about the property's risk profile than any brochure. Where a plot also sits in a clay shrink-swell zone, which affects parts of the Grasse plain and the Opio basin, ask specifically whether the property has ever been the subject of a CatNat declaration for drought. That history follows the building.

Our honest read is that insurance is where the fire question actually shows up in a buyer's monthly budget, not in the purchase price. The clearance bill is annual and modest. The premium is annual and rising for everyone regardless of what you buy.