Buying a mill for sale in Isère (38) means choosing a department where alpine terrain gave water a particular force: the Isère, Drac, Bourbre and above all the Fure, in the Voiron area, once powered numerous mills and water-driven factories. On this page, ma-propriete.fr brings together the mills for sale in Isère: watermills to renovate at the bottom of an alpine valley, former flour mills, and millers' houses with outbuildings, sometimes with genuine hydroelectric potential.
You will also find price benchmarks based on actual sales, an overview of where these properties are concentrated, and the specific points to check before buying a mill in Isère. To prepare your project, read our white paper on setting up a rural gîte, useful for turning a mill's outbuildings into mountain accommodation. Each listing states the property type (watermill, former industrial site or miller's house) and any hydroelectric potential, a useful marker for narrowing your search in Isère.
There are no official statistics dedicated to mills: sales are too rare and too varied (a ruin to restore, a habitable mill, a flour mill with a turbine). The most reliable market benchmark remains the price of country houses, which a habitable mill resembles, with a premium for the water, the character and the water rights, and a discount for the work required.
How much does a country house cost in Isère (38)? According to DVF data (notarised sales) analysed by the ma-propriete.fr observatory, the median price of a country house in Isère (38) stood at €275,000 in 2025, with an average price of €279,107 and a median price of €2,629/m² of living space (2,287 house sales in rural municipalities over the year). The price range is wide: 10% of houses sold for less than €170,000 (floor price, 1st decile) and 10% for more than €400,000 (ceiling price, 9th decile). The typical country house here offers 110 m² of living space on an average plot of 2,597 m², i.e. around 0.3 ha.
This market is well above the regional median (Auvergne-Rhône-Alpes: €230,000) and well above the national median (€189,200). Since the second half of 2020, the median price has risen from €240,000 to €275,000, i.e. +14.6%; over one year (2024-2025) the change is +2.4%.
| 2025 indicator | Isère | Auvergne-Rhône-Alpes | France |
|---|---|---|---|
| Median price | €275,000 | €230,000 | €189,200 |
| Average price | €279,107 | €246,927 | €207,100 |
| Floor price (1st decile) | €170,000 | €98,000 | €90,000 |
| Ceiling price (9th decile) | €400,000 | €410,000 | €340,000 |
| Median price per m² of living space | €2,629/m² | €2,200/m² | €1,830/m² |
| Average living space | 110 m² | 109 m² | 108 m² |
| Average plot size | 2,597 m² | 3,243 m² | 3,181 m² |
| Number of sales in 2025 | 2,287 | 16,528 | 150,313 |
A departmental average hides large gaps. A smallholding to renovate, a restored longère with its outbuildings, a farmhouse on several hectares of land or a manor house with parkland do not sell at the same price, and the location matters as much as the building: coastline, tourist area, peri-urban countryside close to a job market or deep countryside. The table below shows the median price of country houses in Isère (38) by type of municipality (cumulative sales from mid-2020 to 2025) and its change between 2021 and 2025.
| Type of municipality | Median price 2020-2025 | Median price per m² | Change 2021-2025 | Sales 2020-2025 |
|---|---|---|---|---|
| Inland tourist areas (hinterland, mountains) | €262,180 | €2,658/m² | +7.6% | 651 |
| Peri-urban countryside (city catchment area) | €295,274 | €2,809/m² | +5.1% | 7,548 |
| Deep countryside (outside urban influence) | €242,400 | €2,346/m² | +8.3% | 6,866 |
These benchmarks help you assess a listing, estimate a property before putting it up for sale, or set your budget for a holiday home or a permanent move to the French countryside. To go further, see our observatory of country house prices in France (national, regional and departmental analysis, downloadable annual report) and work out the full cost of your purchase, including French notary fees, with our notary fees calculator.
Isère has many watermills, particularly along the Fure, in the Voiron area, where the steep slope and steady flow favoured milling early on and later the paper and metalworking industries. The Isère, Drac and Bourbre rivers also carried mills, most now converted into homes with their millrace and sometimes a water wheel still visible.
In the deeper valleys of the Vercors and Chartreuse ranges, some former mills retain genuine hydroelectric potential thanks to a significant head of water, provided the turbine is restored or a new one installed. Windmills, unsurprisingly, are absent from such a mountainous department. Some sites in the Fure valley have kept their intake channel and part of their mechanism, remnants of a water-driven industry that preceded the department's electrification.
The Voiron area, around the Fure valley, holds the largest number of former mills and water-driven industrial sites available for conversion. Around Grenoble and its TGV station, the foothills of the Vercors and Chartreuse ranges offer a few mountain mills with open views. Towards Vienne, on the Rhône and the Gère, and towards Bourgoin-Jallieu, in the north of the department, buildings sit closer to the Bourbre; La Côte-Saint-André, in the heart of the Bièvre plain, completes the picture. Buyers should also budget time for the administrative side, since a change of use on an old milling site can require sign-off from more than one local authority.
Mills close to Grenoble or in the tourist valleys of the Vercors sell noticeably above the departmental average. The north of the department, around Bourgoin-Jallieu and the Bièvre plain, remains the most affordable area for a mill to renovate. Between the two, the Rives and Renage area, in the Voiron district, offers a balance between access to Grenoble and more moderate prices.
Check the mill's water rights (fondé en titre or a formal authorisation), the condition of the millrace, weir and sluice gates, and the ecological-continuity obligations on the Fure and the Isère, classified rivers where constraints have tightened. A hydroelectric turbine project requires a flow study and prior administrative steps, particularly regulated in mountain areas. It is also worth commissioning a head and flow study from a specialist firm before any turbine project. A notary familiar with rural Isère property can help clarify how an old water right transfers with the sale.
As for the building, check the flood zoning risk at the bottom of an alpine valley, damp, and winter access. Outbuildings (former workshop, barn, miller's house) lend themselves well to a mountain gîte, a sought-after format in a department that is both urban and alpine. Also check the mountain-zone classification, which can subject certain works to specific planning rules. A structural survey focused on the retaining walls and the old intake channel is a sensible precaution before committing to a purchase, particularly on former industrial sites.
On ma-propriete.fr, mill listings in Isère are published by private sellers, estate agents and notaries. Filter by budget, living space and land area, set up an email alert to be told of new listings, and browse all mills for sale in Auvergne-Rhône-Alpes if your search extends beyond the department. An online valuation is also available if you are considering selling your own mill in Isère.
