Building Land Prices 2024: Shock Barometer and 5 Tips

1. Introduction: Stop relying on the “national average price”

Do you think that €100/m² is enough to plan your purchase? Spoiler: it's a joke. The famous “national average price” makes eager buyers dream, but it hides regional rollercoasters, methodological biases, and local specificities that are far more decisive than this inflated figure. If you're planning to lay the foundations of your future home, from Enschede to Marseille or even on the other side of the world, in the shade of the Mauritian tropics, it's better to adopt a surgical approach rather than a game of poker.

In this article, we're going to dissect the hidden truths behind official statistics, debunk common misconceptions, and arm you with fine-grained data. And because we're not here to do things by halves, I've asked the Soléa Realty team – 100% Mauritian, experts in the local and international markets – to share their demanding analytical rigour. Whether you're looking to build in France or invest on the other side of the planet, these tools will save you from a miscalculation.

2. Shock barometer of building land prices in 2024

2.1. Key figures

The first lesson is that we're oscillating between €87/m² and €176/m² depending on the source. Yes, twice as much depending on whether you take DVF data, specialised notaries, or online platforms. Despite a collapse in sales of building land, the average price per m² is increasing by approximately 1.7%. How can this paradox be explained? Quite simply because it's mainly small plots on the outskirts of large conurbations that are selling for top prices, pushing the average up.

2.2. Extreme regional disparities

The figures go wild when you drill down by region: Limousin: €21/m². Île-de-France: from €238/m² to… €850/m² depending on the arrondissements. In Provence-Alpes-Côte d’Azur, expect to pay more than €300/m² for a serviced individual plot. Conversely, sparsely populated rural areas are flirting with €50/m². The map is divided into two: on one side, coastal areas and metropolises, on the other, the hinterland where land is abundant. For a complete analysis, consult the prices of building land in France.

2.3. Myths to abandon

• “All plots are comparable”: false. Between a flat, serviced, south-facing 500 m² plot, and a sloping 2,000 m² plot, the discount can reach 20% to 30%.
• “National averages are enough”: a dangerous illusion. Relying on a generic €100/m² is like signing a blank cheque without knowing if you're signing for a pebble or a piece of paradise.

3. How do you measure the price of building land?

3.1. Main data sources

• DVF database (Demandes de Valeur Foncière): notarial transactions from the last 5 years, free and exhaustive, but raw.
• Notaries (FNAIM, departmental networks): segment individual and collective plots, often more precise.
• Online platforms (SeLoger, LeBonCoin, meilleursagents…): instantaneous, but sometimes inflated on the seller's side.

3.2. Essential biases and adjustments

• Individual house plot vs. collective housing estate: overlooking these nuances can skew your analysis by 10% to 15%.
• Surface area: the larger the plot, the lower the price per m². Apply a discount of 5% to 10% for each additional 500 m².
• Data cleaning: exclude atypical mutations (expropriations, family exchanges, symbolic sales).

For an in-depth analysis of factors and estimation 2024, consult this resource.

3.3. Recommended visualisations

There's nothing like a combination of box plots by region and an interactive map of prices per m². A quick glance and you'll spot the outliers: those areas where even the stingiest wouldn't buy.

4. Regional zoom: what it really costs

4.1. Île-de-France: the bubble under pressure

In Île-de-France, we touch on extremes. The median price is officially around €260/m², but that's the maximum price: €1,200/m² in Hauts-de-Seine, vs. €90/m² in Seine-et-Marne. Between Haussmannian boulevards and beet fields, the gap is almost absurd. Foreign buyers continue to flock to areas near Paris, fuelling speculation. Result: plots are decreasing in size (293 m² in Seine-Saint-Denis) to contain the cost, but the overall price of a plot remains > €150,000 on average.

4.2. Provence-Alpes-Côte d’Azur: the “sun cream” effect

Between Nice, Cannes, and Toulon, you're buying less wall and more m² of light. The average price reaches €320/m², with peaks of €600/m² near the beaches. It's not just the coast, it's the myth of the South: in addition to the sunshine, you pay for the scenic rent. On the other hand, it's difficult to find plots larger than 800 m² for under a million.

4.3. Auvergne-Rhône-Alpes: peace… at what price?

The region attracts city dwellers looking for wide open spaces: €125/m² on average, a +12% increase in five years, but it maintains a good size/price ratio (920 m²). The valleys around Grenoble flirt with €200/m², while Ardèche or Cantal remain below €50/m². You pay for the view of the peaks, not just the land.

4.4. Occitanie & Nouvelle-Aquitaine: the rural compromise

These two regions offer abundant and affordable land: €85/m² in Occitanie, €80/m² in Nouvelle-Aquitaine. Toulouse and Bordeaux pull the average up (up to €300/m² in the inner suburbs), but Creuse and Lozère remain dumping grounds (€20/m²). The average price of a plot confirms this accessibility, perfect for those who accept a 30-minute drive for daily life.

4.5. Grand Est & Hauts-de-France: cheap land, potential under review

Grand Est and Hauts-de-France range between €50/m² and €90/m². The proximity to Northern Europe (TGV, freight) and metropolitan areas like Lille or Strasbourg could drive prices up. In the meantime, land here is affordable, and investors are starting to take notice.

5. Five expert tips for estimating your building plot

1. Comparison method: identify at least three truly similar recent sales (surface area, servicing, PLU). Don't trust ads that are too good to be true.
2. Include the cost of servicing: allow for €5,000 to €15,000 for connections (water, electricity, sanitation). Without this, the land remains uninhabitable.
3. Examine topography, orientation, and shape: a flat, south-facing plot can be worth 5% to 10% more. Conversely, a steep slope or irregular shape leads to an equivalent discount.
4. Analyse the PLU and COS: a poorly managed zoning or too low a COS can turn a dream into a nightmare. Always check the rules at the town hall before signing.
5. Call on a local expert: free, transparent, and reliable. A hint: the Soléa Realty team offers a personalised, free audit for the client, thanks to its network of local partners.

6. Case study: step-by-step estimation of a 1,000 m² plot

Let's imagine a 1,000 m² plot on the outskirts of a regional metropolis, valued at €150/m² as a base. We select three comparables:

• Plot A: 900 m², serviced, €155/m².
• Plot B: 1,100 m², serviced, €145/m².
• Plot C: 1,050 m², unserviced, €130/m².

Gross average: (155 + 145 + 130) / 3 ≈ €143/m².

Additions and deductions:

• Servicing: +€10/m².
• Topography (flat, south-facing): +€5/m².
• PLU (restrictive COS): – €8/m².

Adjusted estimate: (143 + 10 + 5 – 8) × 1,000 = €150,000 – low range €140,000 / high €160,000, depending on negotiation.

7. Beyond price: macro implications and future trends

Building land remains a central issue for access to housing. Rare land or land waste? The ZAN (zero net artificialisation) constraint will force elected officials to densify existing areas rather than expand. Expect to see CES and height rules revisited by 2025.

Urban planning must now reconcile social mix and environmental performance: building higher, rehabilitating old buildings, and promoting mixed programmes. For foreign investors, this is a boon: less volatile secondary markets, interesting capital gain potential. And if you're looking for a pied-à-terre in a tropical zone, Soléa Realty will support you in your due diligence in Mauritius, with transparent advice and no client fees.

8. Conclusion and prospects

Three key takeaways: don't rely on national averages, customise your study according to each regional context, and systematically include all ancillary costs before signing. By 2025, land reforms, inflation, and ZAN will be the determining variables.

Do you have a construction project in France or a desire to invest in the tropics? Contact Soléa Realty for a personalised and free audit, 100% transparent, based on solid data and unparalleled local expertise.