A house in the eight villages of the Riviera hinterland was worth between roughly 4,300 and 6,900 euros per square metre on average at 1 August 2026, and that average is the least useful number in any serious valuation. MeilleursAgents put the mean house price at 6,935 euros per square metre in Mougins, 6,610 in Chateauneuf-de-Grasse, 6,484 in Valbonne, 6,454 in Opio, 6,016 in Biot, 5,899 in Roquefort-les-Pins, 5,340 in Le Rouret and 4,289 in Grasse. Start there and stop there and you will misprice a hinterland villa by six figures.

The reason is spread. In Valbonne, the same source puts 95 percent of houses between 2,825 and 11,116 euros per square metre. That is a factor of four inside one commune of 20 square kilometres. A 180 square metre house on the wrong side of the Route de Cannes and a 180 square metre house on a flat terraced acre above Peyniblou are not the same asset, and no commune-wide figure knows the difference.

A defensible valuation in this market is built from four things. Recent sold evidence from DVF, the public transaction file the DGFiP refreshed on 7 April 2026 with every sale registered up to 31 December 2025. A manual adjustment for the things DVF does not record, which is most of what buyers here pay for. A sanity check against a commune index such as MeilleursAgents or the Notaires de France series. And a clear head about whether you are pricing to sell in the next four months or declaring a value to the tax office at 1 January.

Those last two produce different numbers on purpose. This guide sets out how we build each of them across Valbonne, Mougins, Biot, Grasse, Opio, Roquefort-les-Pins, Chateauneuf-de-Grasse and Le Rouret, which sources we trust for what, and where the ranges get wide enough that only a physical visit settles it.

Why the Commune Average Misleads

Commune averages are built for comparing towns, not for pricing houses. They work when housing stock is uniform. In the hinterland it never is.

Take the published ranges for houses at 1 August 2026. Mougins runs from 3,252 to 13,484 euros per square metre. Chateauneuf-de-Grasse runs from 2,970 to 13,220. Opio runs from 2,581 to 12,773. Grasse, the cheapest of the eight on the mean, still reaches 7,556 at the top, which is above the mean for every commune on the list except Mougins and Chateauneuf. A well-restored bastide on the Route de Cabris can beat a tired 1970s villa in Opio on price per square metre without either figure being strange.

Three structural facts drive that spread. First, plot dominates. Roquefort-les-Pins is 81.9 percent owner-occupied and built at low density on large parcels, so a large share of the value sits in land that never appears in a price per built square metre. Second, the eight communes have very different second-home shares, from 6.9 percent in Grasse to 21.2 percent in Chateauneuf-de-Grasse and 18.1 percent in Opio. Second-home buyers pay for view, quiet and pool. Resident families pay for the CIV catchment, a flat garden and a ten-minute run to Sophia Antipolis. Those two buyers value the same house differently. Third, topography. A south-facing restanque terrace above the Brague with a Lerins horizon and a north-facing plot 400 metres away behind a ridge share a postcode and nothing else.

There is also a data caveat worth knowing. The one-year and five-year evolution percentages MeilleursAgents shows for Le Rouret, Biot, Opio, Roquefort-les-Pins and Chateauneuf-de-Grasse are identical to each other at 1 August 2026, all reading plus 6.3 percent over a year for houses. Only Grasse carries its own series, at plus 1.3 percent. That pattern is consistent with a shared sub-departmental index rather than five independent commune measurements. Treat those momentum figures as a regional signal, not as evidence about your village.

Price Per Square Metre by Commune, August 2026

Here is the full picture at 1 August 2026, mean and range, for the eight communes we cover. All figures are MeilleursAgents estimates expressed net vendeur, meaning before agency commission and before the buyer adds acquisition duty.

Commune	All types	Apartment mean	House mean	House range (95%)
Mougins (06250)	6,139	5,123	6,935	3,252 to 13,484
Chateauneuf-Grasse (06740)	6,242	4,470	6,610	2,970 to 13,220
Valbonne (06560)	5,334	4,553	6,484	2,825 to 11,116
Opio (06650)	6,400	5,786	6,454	2,581 to 12,773
Biot (06410)	5,627	4,897	6,016	2,887 to 10,302
Roquefort-les-Pins (06330)	5,874	5,491	5,899	2,758 to 10,345
Le Rouret (06650)	5,255	4,751	5,340	2,327 to 9,589
Grasse (06130)	3,780	3,505	4,289	1,969 to 7,556

Figures in euros per square metre, MeilleursAgents estimates at 1 August 2026.

Two readings are worth pulling out. Opio has the highest all-types mean at 6,400 euros because it has almost no cheap apartment stock to pull the number down, not because an Opio house beats a Mougins house. Look at the house column and Opio sits fourth. And the gap between the Grasse house mean of 4,289 and the Mougins house mean of 6,935 is 62 percent for two communes whose old towns are twenty minutes apart on the RD6185 and the RD3.

Rental evidence tracks the same order and is useful as a cross-check on sale values. Monthly house rents at the same date run 25.6 euros per square metre in Biot, 24.7 in Mougins, 23.6 in Opio, 23.5 in Chateauneuf, 23.4 in Valbonne and Roquefort-les-Pins, 23.0 in Grasse and 21.3 in Le Rouret. Note that Grasse rents almost as well as Valbonne while selling for a third less. If a valuation implies a gross yield far outside the local band, one of the two numbers is wrong.

The Four Sources Worth Using, and What Each One Leaves Out

Four sources are worth the time. Each answers a different question and each has a hole in it.

DVF, the public sold-price file. Published by the DGFiP under article L. 112 A of the Livre des procedures fiscales, open since the decree of 28 December 2018, free, under Licence Ouverte 2.0. It is refreshed twice a year, in April and October. The April 2026 release landed on 7 April and carries every sale registered by the services de publicite fonciere up to 31 December 2025. The October 2026 release will add the first half of 2026. It keeps a rolling five-year window and each update fully replaces the previous files. Alpes-Maritimes is covered in full. Alsace, Moselle and Mayotte are not, for reasons of local land law. The official viewer sits at explore.data.gouv.fr/immobilier.

Patrim, the authenticated version. Reached through your personal space on impots.gouv.fr under Autres services, free, governed by article L. 107 B LPF. You must state a reason for access from a fixed list that includes a succession declaration, an IFI calculation, preparing a donation, a tax audit or expropriation, and buying or selling. What you get back that DVF does not give you is the periode de construction of each comparable, and a filtered set, since the DGFiP states it shows only sales that genuinely reflect market prices. The information is reserved for your own use.

Commune indices such as MeilleursAgents. Monthly, modelled from partner agency transactions, listings and socio-demographic data outside Ile-de-France, published net vendeur with a confidence index from one to five. Good for direction and for a first bracket. Weak at the tails, which in this market is exactly where the interesting houses live.

The Notaires de France series. Built on the BIEN and Perval databases and closer to legal reality than any modelled index. The Q1 2026 note, published 7 July 2026 and updated on 23 July, put French existing-home prices at plus 0.2 percent year on year, with apartments plus 0.6 and houses minus 0.2. Province was flat overall. Their forward reading from signed avant-contrats projected minus 0.6 percent to end July 2026, with houses at minus 0.9. Volumes held up better, at 949,000 sales in the twelve months to end May 2026, up 5.7 percent but decelerating from plus 11.4 percent at end February. The notaires also flagged a slowing prestige segment in Ile-de-France and on parts of the coast. That last line matters here.

How to Read a DVF Comparable Without Fooling Yourself

DVF is the best free evidence in France and the easiest to misread. Six things to hold in your head before you use a comparable.

The price is net vendeur. It excludes agency commission and it excludes notaire fees. It also excludes any furniture sold alongside, and it includes VAT where VAT applied. So a DVF line reading 1,180,000 euros for a house on the Chemin du Val Martin is what the seller contracted for, not what the buyer wrote cheques for. Add acquisition duty on top to get the buyer outlay.

The surface is not the surface you think. DVF records surface reelle batie. That is not surface habitable and it is not Carrez. A Carrez field exists in the raw file but the DGFiP describes it as filled sporadically and without legal value. Comparing a DVF price per square metre against a Carrez measurement from an agency listing mixes two different rulers, and the Carrez threshold of 1.80 metres of ceiling height against 2.20 metres for surface habitable is enough to shift a converted attic in or out of the count.

Condition is absent. There is no field for state of repair, no field for the DPE letter, no field for view, aspect or renovation history. In Alpes-Maritimes those are the dominant price drivers. Every DVF comparable therefore needs a manual adjustment you make yourself, from photographs, the cadastral parcel, a site visit or memory of the sale.

Floor level is missing for apartments. The DGFiP confirms the field is not in the source data. A third floor with a terrace in Garbejaire and a ground floor unit in the same residence appear identically.

The lag is real. Today the freshest DVF evidence for the hinterland ends at 31 December 2025. In a market that the notaires read as softening at the top through the first half of 2026, eight-month-old evidence needs a judgement overlay, not a straight read.

Parcel joins fail. Some transactions never appear on the map viewer because the cadastral join failed, and commune mergers break section references. If a street looks suspiciously empty, download the raw file rather than concluding that nothing sold.

The Adjustments That Actually Move the Number

This is where a valuation is actually made. Our working adjustments, in rough order of how much they move a hinterland house.

Land and usable land. Not plot size, usable plot size. A 4,000 square metre parcel that is 70 percent steep scrub behind a retaining wall supports a fraction of the value of 2,000 flat square metres with a pool platform and an olive terrace. In Roquefort-les-Pins and Le Rouret, where large parcels are the product, this is the single largest line in the calculation.

View, and which view. A sea horizon toward the Lerins islands from the church terrace side of Chateauneuf-de-Grasse is a different asset from a green valley view over the Brague. Buyers pay a clear premium for the first and a modest one for the second. Both beat a view of the neighbour.

Noise and road exposure. The A8 runs along the southern edge of this market and the RD2085, RD3, RD4 and RD6185 carry the local traffic. A house 200 metres from the Pre-du-Lac roundabout and a house 200 metres up a chemin behind it are priced differently by every buyer who visits at 8am on a Tuesday.

School catchment. The Centre International de Valbonne at Sophia Antipolis reshapes demand across Valbonne, Biot and the Sophia side of the market, and Mougins School does similar work in Mougins and Le Rouret. International families with a placement pay to shorten the school run. Verify the catchment before you price the premium into an asking figure, because it moves.

Pool, and whether it is legal. A declared, conforming pool with a safety barrier adds value. An undeclared one creates a deduction and a problem at the acte.

Planning compliance. Extensions, pool houses and converted garages built without a permit are common in this stock. A buyer with a good notaire discounts for the regularisation risk or asks for it to be cleared before signature.

Walkability. Being able to reach the Place des Arcades in Valbonne or the village square in Le Rouret on foot commands a premium that has widened over the last five years, particularly among buyers over sixty.

The DPE letter. Now a pricing input rather than a formality, for reasons set out next.

The DPE, the 2026 Recalculation and Green Value

The DPE changed on 1 January 2026, and the change helps some hinterland sellers.

The arrete of 13 August 2025, published in the Journal officiel on 26 August 2025, cut the primary-energy conversion coefficient for electricity from 2.3 to 1.9 with effect from 1 January 2026. No letter boundary moved. The ministry was explicit that no dwelling would see its label fall, and only electrically heated dwellings can improve. That is a meaningful population here, given how many 1970s and 1980s villas around Opio, Roquefort-les-Pins and Le Rouret run on electric convectors or a heat pump. Any DPE issued from 1 January 2026 applies the new coefficient automatically. A pre-2026 certificate can be reissued free through the ADEME observatory without a new site visit, which is worth doing before you list if electricity is your main heat source.

The letter matters because of the letting timetable, which prices in for any buyer who might rent the house out. Since 1 January 2025 a G-rated dwelling is not decent for a long-term let in mainland France. From 1 January 2028 class F goes the same way. From 1 January 2034 class E follows. Rents on private F and G dwellings have been frozen since 24 August 2022, with no increase permitted on reletting, renewal or annual indexation until a post-works DPE reaches at least E.

DPE letter	Banned for new long-term lets from	Rent increases
G	1 January 2025	Frozen since 24 August 2022
F	1 January 2028	Frozen since 24 August 2022
E	1 January 2034	Not frozen

Enforcement is civil rather than administrative. No inspector arrives. A tenant goes to the juge civil, who can order works, cut or suspend the rent and suspend the lease term, and the CAF can withhold APL for up to eighteen months.

On the value side, be careful with the discount figures circulating online. The most recent Notaires de France valeur verte study, covering homes sold in 2024 and published in April 2025, found F and G properties made up 15 percent of existing-home sales in mainland France excluding Corsica, down two points, and that F and G houses fell from 20 percent of the market in 2023 to 17 percent in 2024. We have not found a PACA-specific percentage discount in the notaires publication itself, so we do not quote one. What we see in practice on this side of the A8 is that an F or G on a large villa produces a works negotiation rather than a fixed haircut, and the size of that negotiation tracks the quote, not a national average.

Valuing for Tax: IFI, Succession and Donation

A valuation for the tax authorities is a different exercise from a valuation for a sale, and the two are meant to differ.

For the impot sur la fortune immobiliere, the test is the valeur venale reelle at 1 January of the year, meaning the price at which the property would normally have been negotiated had it been sold on that date. The 2026 threshold is net taxable property wealth above 1,300,000 euros at 1 January 2026, unchanged. The scale runs 0.50 percent from 800,000 to 1,300,000 euros, 0.70 percent from 1,300,000 to 2,570,000, 1.00 percent from 2,570,000 to 5,000,000, 1.25 percent from 5,000,000 to 10,000,000 and 1.50 percent above that, with a decote between 1.3 and 1.4 million euros equal to 17,500 minus 1.25 percent of net taxable wealth. The 2026 assessments were issued in August 2026 and fall due on 15 September 2026.

Two provisions matter for anyone with a hinterland house. A 30 percent abattement applies to the valeur venale of a principal residence, limited to one property per IFI household, and it is lost if the house is held through an SCI de gestion. And where taxable property exceeds 5 million euros and deductible debt exceeds 60 percent of that value, the excess above 60 percent is deductible at only half.

The penalty regime is the reason to keep your working. An insufficiency in good faith attracts interest at 0.20 percent a month. A deliberate breach attracts a 40 percent uplift on top, and fraudulent manoeuvres or abuse of law attract 80 percent. The burden of proving deliberateness sits with the administration, which in practice means a dated, sourced valuation file with three or four Patrim comparables is a strong defence and a round number pulled from a website is not.

The same discipline applies to a succession declaration or a donation. Undervaluing a Mougins villa to reduce droits de succession works until the property sells for a materially higher figure within a few years, at which point the file gets a second look. Our practice is to write the valuation with the comparables attached, note the specific deductions taken for condition, DPE or a shared driveway, and keep it. If the position is ever questioned, the argument is already written.

What the Buyer Pays and What You Receive

Sellers price in net vendeur. Buyers budget in total outlay. Confusing the two is the most common arithmetic error we see.

Alpes-Maritimes did not adopt the departmental duty increase that the loi de finances 2025 made available. Under article 116 of that law, departments could raise the departmental share above 4.50 percent to as much as 5.00 percent for deeds signed between 1 April 2025 and 31 March 2028. The DGFiP table of rates applicable at 1 February 2026 shows no voted uplift for the 06 and the standard 4.50 percent under article 1594 D of the CGI. The loi de finances 2026 then changed the timing rules, so a deliberation notified between 16 April and 30 November 2026 could only take effect from 1 January 2027. In other words the 06 remains at the lower rate today and could still move for deeds signed from next January.

Component	Basis	Rate on price
Departmental duty	Art. 1594 D CGI	4.50%
Communal additional tax	Art. 1584 CGI	1.20%
Frais d'assiette on the departmental share	Art. 1647 V-b CGI	0.107%
Total transfer duty		about 5.81%

That is duty alone. Notaire emoluments, formalities and disbursements sit on top, which is why the working assumption for an existing property in the 06 lands near 7 to 8 percent of the price all in. New build under article 1594 F quinquies is charged at 0.70 percent and is unaffected by the uplift mechanism.

On the seller side, a secondary residence gain is taxed at 19 percent income tax plus 17.2 percent social charges, so 36.2 percent before relief, with an additional surtax of 2 to 6 percent on gains above 50,000 euros. Income tax relief runs at 6 percent a year from the sixth to the twenty-first year of ownership and 4 percent for the twenty-second, giving full exemption at 22 years. Social charges taper more slowly, at 1.65 percent a year from year six to year twenty-one, 1.60 percent for year twenty-two and 9 percent a year from year twenty-three, reaching full exemption at 30 years. A house bought in Opio in 2004 and sold now is exempt from income tax on the gain and still carries social charges.

One trap for owners who have been letting furnished. For sales from 15 February 2025, depreciation previously deducted under the regime reel BIC is added back into the capital gain calculation. If your Biot apartment has been an LMNP for a decade, the taxable gain is larger than the price difference suggests.

How We Value a Hinterland House

Our honest read on method, in the order we do it.

We start with the parcel, not the house. Cadastral reference, actual usable area, slope, aspect, access, and whether the neighbour can build. That takes twenty minutes and it frames everything after it.

Then we pull sold evidence. Three to six DVF or Patrim comparables inside the same commune and, where possible, the same sector. Val de Cuberte against Val de Cuberte, Tournamy against Tournamy, Pre-du-Lac against Pre-du-Lac. Crossing a sector boundary to find a comparable is usually worse than crossing a commune boundary to find a similar sector.

Then we adjust each comparable manually for the things DVF cannot see. Condition, DPE, view, pool, noise, planning status. We write the adjustment down as a percentage with a one-line reason, because a valuation you cannot explain line by line is a guess with a spreadsheet around it.

Then we check the result against the commune index and against the local rental band. If our figure implies a gross yield of 2 percent in a commune where houses let at 23 euros per square metre a month, we look again.

Then we decide what the number is for. An asking price sits above our central figure by a negotiating margin that depends on how thin the buyer pool is for that specific house. A tax valuation at 1 January sits at the central figure with deductions documented. A pre-emptive valuation before a divorce or a succession sits at the central figure with the range attached, because the range is the honest answer.

When is a free online estimate enough? For a standard apartment in Garbejaire or Plan de Grasse with plenty of comparable stock, an online tool with a confidence index of four or five will land close, and we would not argue with it. For a villa on a hectare above Chateauneuf with a Lerins horizon, an old roof and a G rating, no model in France has enough comparables to be useful, and the published range for the commune tells you so.

Pricing Into a Slower Prestige Market

The last piece is timing, and mid-2026 is not mid-2024.

The Notaires de France reading for Q1 2026, published in July, has national existing-home prices at plus 0.2 percent over a year, houses at minus 0.2, and the forward projection from signed avant-contrats at minus 0.6 percent to end July with houses at minus 0.9. Volumes were still rising, at 949,000 sales in the twelve months to end May 2026, but the growth rate halved from plus 11.4 percent at end February to plus 5.7 percent. The notaires specifically noted a slowing prestige segment including parts of the coast.

Against that, the hinterland indices at 1 August 2026 still show houses up over a year, at plus 6.3 percent across five of the eight communes and plus 1.3 percent in Grasse. Both things can be true. Volume-weighted local demand around Sophia Antipolis has held while the top of the market, meaning houses above roughly 2.5 million euros with an international buyer pool, has thinned.

What that means for a seller in practice. Below about 1.2 million euros, in Grasse, Le Rouret, Plan de Grasse and the apartment stock around Valbonne and Biot, a correctly priced property still moves in a normal timeframe and there is little reason to discount ahead of the market. Between 1.2 and 2.5 million, the buyer pool is real but patient, and an asking price more than 8 to 10 percent above defensible evidence tends to produce three months of silence followed by a worse outcome than a realistic start. Above 2.5 million, price formation is slow, the sample of comparable sales in any one commune is small, and a seller who needs a date should expect to meet the market rather than wait for it.

One more practical point. The October 2026 DVF release will publish first-half 2026 sales. If you are pricing a sensitive property, that release will materially improve the evidence base for anything transacting in the autumn, and it costs nothing to wait for it before setting a final figure.

If you want our read on a specific house, we do valuations across all eight villages, with the comparables and the adjustments written out. We would rather give you a range you can defend than a number you like.

Frequently Asked Questions

At 1 August 2026 MeilleursAgents put the mean house price in Valbonne at 6,484 euros per square metre, with 95 percent of houses between 2,825 and 11,116 euros. Apartments averaged 4,553 euros and the all-types figure was 5,334. The spread matters more than the mean. Sector, plot, view, condition and DPE routinely move a Valbonne house by 30 percent or more against the commune average, so use the mean as a bracket and build the actual figure from sold comparables in the same sector.

DVF is free and open under Licence Ouverte 2.0. It is published by the DGFiP twice a year, in April and October. The most recent release went live on 7 April 2026 and contains every sale registered up to 31 December 2025. The October 2026 release will add sales from January to June 2026. It holds a rolling five-year window and each update replaces the previous files entirely. Alpes-Maritimes is fully covered. The official viewer is at explore.data.gouv.fr/immobilier.

Yes, if you want the buyer total. DVF records the price net vendeur, which excludes agency commission and notaire fees and any furniture sold with the property. In Alpes-Maritimes transfer duty on an existing property runs to about 5.81 percent of the price, made up of 4.50 percent departmental duty, 1.20 percent communal tax and 0.107 percent frais d'assiette. Notaire emoluments and disbursements sit on top, so a working figure of 7 to 8 percent all in is realistic.

For standard apartment stock, yes, within a useful margin. For a villa on a large plot, no. Online models are built from transaction density and the hinterland does not have it at the top of the market. The published range for houses in Chateauneuf-de-Grasse at 1 August 2026 ran from 2,970 to 13,220 euros per square metre, which is the model telling you it cannot separate those properties. Anything with a view premium, a large plot or a poor DPE needs sold comparables and a manual adjustment.

You declare the valeur venale reelle at 1 January of the year, meaning the price the property would normally have fetched had it sold that day. The 2026 threshold is 1,300,000 euros of net taxable property wealth at 1 January 2026. A 30 percent abattement applies to a principal residence, for one property per household, and is lost if the house is held through an SCI de gestion. The DGFiP names Patrim on impots.gouv.fr as the tool for establishing that value. Keep the comparables and the reasoning on file, because a deliberate understatement carries a 40 percent penalty on top of interest at 0.20 percent a month.

It changes the negotiation more than it sets a fixed discount. A G rating cannot be let long term in mainland France since 1 January 2025, F follows on 1 January 2028 and E on 1 January 2034, and rents on F and G have been frozen since 24 August 2022. Any buyer who might let the property prices that in. From 1 January 2026 the electricity conversion coefficient in the DPE calculation fell from 2.3 to 1.9, which can only improve labels and only for electrically heated homes. If your house runs on electricity, have the certificate reissued through the ADEME observatory before listing. It is free and needs no new visit.

Use both. DVF is open, needs no login and is easy to scan across a whole sector. Patrim requires authentication through your impots.gouv.fr space and a stated legal reason such as an IFI calculation, a succession, a donation or a sale, and it returns a filtered set that the DGFiP says reflects genuine market prices, together with the period of construction of each comparable, which DVF does not give. Neither records condition, DPE, view or floor level, so both need the same manual adjustment afterwards.

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