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Key takeaways
- The most reliable free data source for French property transactions is DVF (Demande de Valeur Foncière), published by the government. It shows every registered property sale in France since 2014.
- Price per m² varies enormously: Paris averages around 9,500 EUR/m² (2025), Lyon around 4,200 EUR/m², Marseille around 2,800 EUR/m², and smaller cities from 1,500 EUR/m².
- The comparable sales method (méthode par comparaison) is the standard professional valuation approach. It adjusts for size, floor, condition, and features relative to recent comparable sales.
- Rental yield (rendement locatif) is calculated as annual rent divided by purchase price. Gross yields in Paris typically run 2-4%; in secondary cities 4-7%.
- DPE energy rating now materially affects value. G-rated properties traded at an average 15-20% discount relative to equivalent D-rated properties in 2024.
- An estate agent's estimate (avis de valeur) is free and useful, but not legally binding and may be inflated to secure the mandate.
Why valuation matters
Whether you are setting a sale price, calculating rental yield, negotiating a purchase, or planning a refinancing, a credible property valuation is the starting point. In France, professional valuations are carried out by experts immobiliers (certified valuers) or notaires, but most owners begin with a combination of free online tools and comparable sales data.
Getting the number right matters in both directions. Overpricing leads to extended time on market, price reductions, and weaker negotiating position. Underpricing means leaving money on the table. This guide covers the methods used by professionals and the free tools available to any owner or buyer.
DVF: the government transaction database
The Demande de Valeur Foncière (DVF) is a public database of all property sales registered with French notaires since 2014. It is published by the Direction Générale des Finances Publiques (DGFiP) and is freely accessible at dvf.etalab.gouv.fr or via data.gouv.fr.
Each record shows: address, sale price, date of sale, surface area, number of rooms, and property type. DVF is the most reliable source for comparable sales because it records actual registered prices, not asking prices.
What DVF tells you
You can filter by property type (apartment), surface band, and date range, then calculate the price per m² for each transaction. Aggregating 10-20 nearby sales gives a solid baseline for your comparable analysis.
Tip: Use the DVF map view at app.dvf.etalab.gouv.fr to see sales within 200 m of any French address. Filter by apartment type and approximate size. Aim for at least 5-10 comparable transactions within the last 12 months.
DVF limitations
DVF data is typically 6-9 months behind the current date. For very recent market moves, supplement with live listing data from MeilleursAgents or SeLoger. DVF also does not record floor level, condition, or whether a property has outdoor space, so you will need to make manual adjustments.
The comparable sales method
The méthode par comparaison is the standard professional valuation method in France. It establishes value by reference to recent sales of similar properties, then adjusts for differences. Here is how to apply it step by step.
Step 1: Identify comparable transactions
Use DVF for completed sales. Aim for properties within 500 m, same number of rooms, similar age and condition, sold within the last 12 months. The closer and more recent, the more weight each comparable carries.
Step 2: Calculate price per m²
Divide the sale price by the surface area. For apartments in co-ownership (copropriété), always use the surface Carrez — the legally defined measurement used in French sale contracts. This excludes cellars, parking, and areas under 1.80 m ceiling height.
Step 3: Adjust for differences
Apply percentage adjustments to account for the differences between each comparable and your property:
- Floor level: Ground floor typically -5 to -10%; high floor with lift +5 to +10%
- Condition: Unrenovated -10 to -20%; recently renovated +5 to +15%
- Orientation: South-facing +5%
- Outdoor space: Balcony or terrace adds approximately 30-50% of the interior rate per m² of outdoor space
- Parking or cave: Add 10,000-40,000 EUR as a lump sum, depending on city and demand
Step 4: Apply to your property
Multiply the adjusted average price per m² by your property's surface Carrez, then add any lump-sum adjustments for parking, outdoor space, or cave.
Worked example
| Item | Value |
|---|---|
| Comparable average price/m² | 4,400 EUR |
| Floor adjustment (1st floor, with lift) | +3% = 4,532 EUR/m² |
| Condition adjustment (partially renovated) | -5% = 4,305 EUR/m² |
| Outdoor space (12 m² balcony at 30% of interior rate) | +15,498 EUR (lump sum) |
| Property surface Carrez | 58 m² |
| Base value | 4,305 x 58 = 249,690 EUR |
| Add balcony | +15,498 EUR |
| Estimated value | ~265,000 EUR |
Rental yield valuation
Investors often value property based on rental yield (rendement locatif). This approach is most relevant for buy-to-let decisions and for checking whether a sale price is justified by the income the property can generate.
The formula
Gross yield = (Annual rent / Purchase price) x 100
Net yield adjusts for costs. Subtract property tax (taxe foncière), management fees, insurance, vacancy allowance, and maintenance. Typically this means reducing gross annual rent by 20-30% before dividing by the purchase price.
Gross yield benchmarks by city (T2 apartments, 2025)
| City | Typical T2 price | Typical T2 rent/month | Gross yield |
|---|---|---|---|
| Paris | 350,000 EUR | 1,200 EUR | ~4.1% |
| Lyon | 200,000 EUR | 850 EUR | ~5.1% |
| Bordeaux | 220,000 EUR | 780 EUR | ~4.3% |
| Marseille | 130,000 EUR | 680 EUR | ~6.3% |
| Lille | 120,000 EUR | 650 EUR | ~6.5% |
| Toulouse | 160,000 EUR | 720 EUR | ~5.4% |
Net yield after tax and costs in Paris often falls below 2% for LMNP landlords without depreciation benefits. For buy-to-let investment purely on yield, Paris requires a long time horizon or leverage to justify the price.
DPE energy rating and value
Since the Loi Climat et Résilience 2021 and the 2025 rental ban on G-rated properties, the DPE (Diagnostic de Performance Energétique) energy rating has become a material value factor. It is no longer just a compliance document: it directly affects what buyers are willing to pay.
Value impact by DPE rating (2024-2025 data)
| DPE rating | Value impact vs D-rated equivalent | Rental restrictions |
|---|---|---|
| A or B | +5 to +10% | None |
| C | +2 to +5% | None |
| D | Baseline | None |
| E | -5 to -10% | Ban from 2034 |
| F | -10 to -15% | Ban from 2028 |
| G | -15 to -25% | Already banned from new leases (2025) |
Important: A G-rated property cannot be offered on a new or renewed lease since 1 January 2025. It can still be sold, but buyers will factor in the cost of energy renovation works (typically 15,000-50,000 EUR) when making offers. Always disclose the DPE before marketing.
Free online valuation tools
Several free tools are available to French property owners and buyers. Each has different strengths. Using two or three in combination gives a more reliable orientation than any single source.
| Tool | What it does | Best for | URL |
|---|---|---|---|
| DVF | Shows all registered sales since 2014 | Comparable transactions | app.dvf.etalab.gouv.fr |
| MeilleursAgents.com | Automated valuation model, price trends by neighbourhood | Quick market estimate | meilleursagents.com |
| SeLoger Estimation | Based on current listings and recent sales data | Asking price benchmarks | seloger.com |
| Notaires de France | Official price indices by département and property type | Trend analysis | notaires.fr |
| PAP Estimation | Combines listing data and transaction records | Cross-check tool | pap.fr |
No online tool replaces a proper appraisal. They are useful for orientation but use averages that may not reflect your specific building, floor, or condition. Use at least two tools and cross-check with DVF.
When to get a professional valuation
A professional valuation (expertise immobilière) by a certified expert (MRICS or REV-certified) costs 500-2,000 EUR and produces a legally defensible written report. It goes beyond comparable sales to assess structural condition, co-ownership charges, planning constraints, and market context.
Situations that warrant a professional valuation
- Divorce proceedings: Courts require a neutral, certified valuation when parties cannot agree on property value.
- Succession and inheritance: The notaire handling the estate will request a valuation for tax declaration purposes.
- IFI (Impôt sur la Fortune Immobilière): Owners with a real estate patrimony above 1.3M EUR must declare property values annually. A professional valuation provides defensible documentation.
- Unusual properties: Banks may require a certified appraisal when financing atypical properties (large area, commercial ground floor, listed buildings).
- Co-ownership disputes: Litigation with another co-owner or buyer requires an independent, certified opinion.
Estate agent's avis de valeur
An estate agent's estimate is free and is a reasonable starting point for setting a sale price. It is not a formal appraisal and carries no legal weight. Agents sometimes inflate their estimate to win the sales mandate. Request valuations from two or three agents and compare their reasoning, not just the headline figure.
Frequently asked questions
Sources
- dvf.etalab.gouv.fr — Demande de Valeur Foncière, Direction Générale des Finances Publiques (DGFiP)
- notaires.fr — prix immobiliers — Official price indices by département, Conseil Supérieur du Notariat
- meilleursagents.com — Automated valuation model and price trend data
- legifrance.gouv.fr — Loi Climat et Résilience (Loi n° 2021-1104 du 22 août 2021)
- service-public.fr — DPE: Diagnostic de Performance Energétique, obligations and rental ban schedule