What are the best practices for securing the purchase of building land? Is a soil study mandatory? How can you check easements, servicing and access before signing?
Buying building land requires checking certain essential elements such as the planning certificate, the nature of the soil and the presence of easements.
This buyer’s guide explains everything you need to know about geotechnical studies, easements and road access for any building plot. You will also find a mini numerical case study and an operational checklist.
To secure your acquisition project, contact your local Capifrance real estate advisor.
Understanding the purchase of building land : definitions and distinctions
Before making any offer, clearly define what building land is. The local urban plan (PLU) or, failing that, the land use plan (POS), sets the local rules. These rules concern height, building footprint and siting.
The planning certificate (CU) exists in two forms.
The informational CU indicates the applicable regulations.
The operational CU specifies whether a specific project is feasible and whether utilities are available.
Non-buildable land is often classified in agricultural or natural zones. It does not allow construction without a zoning change or an administrative exemption. Agricultural land and leisure land are subject to different uses and taxation.
The buildable surface area, building footprint and, in some cases, the land occupancy coefficient (COS), determine how much of the plot you can build on. Check these parameters in the PLU.
Practical advice: always request the planning certificate and the cadastral extract from the very first visits. If your project is already well advanced, require an operational CU to secure your purchase.
What is building land?
Building land is a plot whose designation in the PLU/POS allows construction according to local rules.
The informational planning certificate provides information on the general rules. The operational planning certificate confirms the feasibility of a specific project and the availability of utilities.
You can obtain these documents from the town hall or via online services. The service-public.fr website explains the procedures in detail.
Building land vs non-buildable, agricultural or leisure land
Non-buildable land does not allow the issuance of a building permit as long as the zoning has not been changed. Its conversion into building land can be long and costly.
Agricultural land is often protected by specific rules and requires authorizations to change its use. Leisure land is not intended for residential construction.
Plots in subdivisions are generally serviced, which makes construction easier. Plots outside subdivisions offer more freedom but require more technical and administrative procedures.
Before buying, consult the cadastral plot and the cadastral map. Check the history of authorizations to avoid relying on an unverified promise of buildability.
Soil study for building land: what you need to know
Carrying out a soil study protects your project. It assesses the soil’s bearing capacity, identifies the water table and determines the risk of clay shrink-swell. The recommendations directly affect foundation costs.
Even on serviced land, the nature of the soil may require special foundations. It is therefore advisable to carry out the study before signing or to include a soil study condition precedent in the preliminary sales agreement.
The soil report is then used by builders and insurers. It justifies foundation recommendations and facilitates obtaining structural damage insurance.
Entrust this task to a geotechnician or a geotechnical engineering firm. The content and cost vary depending on the complexity of the site.
Types of geotechnical studies: G1, G2 and soil testing
The G1 geotechnical study is a preliminary diagnostic study. It maps the soil and estimates the risks. It helps decide whether or not to buy.
The G2 geotechnical study (G2-AVP/G2-PRO) includes geotechnical testing: core drilling, penetrometer or pressuremeter testing. It provides precise specifications for foundation execution.
Indicative ranges: G1 ≈ €600 to €1,500. G2 with soil testing ≈ €2,000 to €6,000, depending on the plot and the region. Always request a detailed quote.
When should a soil study be carried out and who performs it?
Ideally, the soil study should be carried out before purchase. Failing that, include a dedicated condition precedent in the preliminary sales agreement.
A geotechnician or a geotechnical engineering firm carries out the study. Delivery times range from a few days to several weeks depending on the depth of the soil testing.
Banks may require in-depth studies before granting a loan for major construction. Therefore, factor these delays into your financing timetable.
Easements affecting building land: identifying and securing them
Easements on building land sometimes limit the siting or use of a plot. They affect usability value and resale value. It is essential to identify them before buying.
A distinction is made between private easements (right of way, right to light, party wall) and public utility easements (pipelines, environmental easements). Both categories may impose long-term obligations.
Also check the urban right of pre-emption. The municipality may pre-empt the plot; ask the town hall before signing anything.
Finally, consult the Risk Prevention Plan (PPR). It provides information on natural hazards and may restrict buildability or impose technical requirements.
Private easements: right of way, right to light, party walls
A right of way easement facilitates access to a landlocked plot. However, it may limit siting and create maintenance obligations.
To identify easements, request the cadastral extract, the statement of encumbrances from the notary and the boundary survey report if one exists.
If necessary, negotiate with the seller for a buyout or amendment of the easement deed. You can also provide for compensation in the preliminary agreement.
Public and administrative easements: SUP, PPR
Public utility easements (SUP) and requirements related to the PPR appear in planning documents. They may prohibit construction in certain areas.
The PPR classifies hazards (flooding, ground movement, seismic risk). In a risk zone, the permit may be refused or subject to technical requirements.
Request the up-to-date documents from the town hall and, where applicable, an operational planning certificate to know precisely the constraints applicable to your project.
Access, roads and servicing of building land
Access to building land is decisive for the feasibility of the construction project. Access must allow the passage of machinery and the delivery of materials. Otherwise, opening works may be necessary.
Land servicing includes water connection, electricity connection, drainage connection, gas connection and fiber connection operations. It sometimes also includes the installation of manholes and meters.
Contact the operators: local water supplier, Enedis for electricity, GRDF for gas, fiber operators and the SPANC for non-collective sanitation. Request several servicing quotes.
Costs vary greatly depending on the distance to the networks and the topography. A boundary connection may cost a few hundred euros. A long-distance connection may reach €10,000 to €30,000 or even more.
Road access, access path and road right-of-way: points to watch
Check whether the access road is a municipal road or a private path. Maintenance and responsibility for works differ depending on the status.
For a landlocked plot, anticipate negotiating a right of way or creating an easement formalized by deed.
Consider the topography: sloping land may require drainage and earthworks. Include these costs in your budget.
Servicing and utility connections: costs and procedures
The connection request begins with the relevant network operators. Each request leads to a quote and a preliminary study.
If there is no collective sanitation network, the SPANC requires a study and the installation of a compliant non-collective sanitation system.
Estimate full servicing between €5,000 and €50,000 depending on the distance to the networks, the topography and the work required. Do not forget the possible development tax.
Administrative documents and planning checks before purchase
Before signing, ask the seller for: the cadastral extract, the cadastral map, the title deed and the planning certificate (CU). Also request previous permits and the list of registered easements.
Boundary marking of the land by a chartered surveyor is strongly recommended. The boundary survey report legally establishes the limits and avoids later disputes.
Consult the PLU to read the zoning (U, A, N zones). Identify the maximum siting, building footprint and buildable area.
Add conditions precedent (obtaining the CU, soil study, financing) to the preliminary agreement. Ask the notary for the statement of encumbrances and mortgage verification.
PLU, POS, planning certificate: how to read and interpret them
The PLU classifies plots and defines construction rules. Identify the zone, the authorized heights and the permitted footprint.
The informational CU describes the applicable regulations. The operational CU confirms the feasibility of a specific project and the availability of utilities.
If reading the PLU seems complex, ask the town hall’s planning department or your local real estate advisor for help.
Cadastre, boundary marking, regulatory diagnostics and PPR for building land for sale
The cadastre identifies the cadastral plot and its boundaries. The official boundary marking by a chartered surveyor legally fixes these boundaries.
Require all diagnostics and studies carried out, especially the soil study. Have these documents analyzed by your experts before purchase.
Consult the PPR at the town hall to learn about natural risks and adapt your project accordingly.
Securing the purchase: legal procedures, clauses and parties to consult
Protect yourself with a land sale agreement or promise containing conditions precedent. Examples: obtaining the CU, favorable G1/G2 study result, obtaining financing and boundary marking.
The notary verifies the legal situation, transfer duties and calculates the notary fees. Allow around 7–8% of the price, to be checked depending on the department.
The key parties involved are the chartered surveyor, the geotechnician and your local real estate advisor. They coordinate the studies, boundary marking and administrative procedures.
Preliminary sales agreement for building plots, conditions precedent and guarantees
Insert standard clauses: obtaining the operational planning certificate within X days, favorable G1/G2 result, obtaining financing and completion of the boundary marking.
These clauses allow you to recover the deposit or renegotiate the price if an unforeseen constraint arises.
Provide realistic deadlines and the arrangements in case a geological hazard or flood-prone area is discovered.
Role of the notary, chartered surveyor and local real estate advisor
The notary for land purchase secures the authentic deed, calculates duties and verifies the absence of mortgages.
The chartered surveyor carries out the boundary marking, drafts the boundary survey report and advises on division or subdivision possibilities.
The Capifrance advisor brings local knowledge of land prices, helps with negotiations and connects you with a surveyor, notary and geotechnician.
Costs, financing and economic impacts for building land
Anticipate the main items: land price, notary fees for land (~7–8%), soil study cost, servicing cost and development tax.
Servicing costs vary greatly: from a few thousand euros to several tens of thousands of euros.
Financing: personal contribution, construction loan including the land and, depending on your situation, a zero-interest loan (PTZ) if you are eligible as a first-time buyer.
For a mortgage simulation and a local estimate of land price per square meter, contact a Capifrance advisor.
Practical cases and numerical examples for buying building land
Here is an example of a €90,000 land purchase in a peri-urban area. These figures are estimates to be checked locally in 2026.
Assumptions: unserviced land, sold by a private individual, medium-complexity servicing, no prohibitive PPR.
Estimates: G1 study = €600–€1,500. G2 study + soil testing = €2,000–€6,000. Simple servicing = €5,000–€15,000. Heavy servicing = €15,000–€50,000.
Notary fees (~7.5%) ≈ €6,750. Development tax estimated at €2,000–€10,000 depending on the municipality. Total excluding construction ≈ €102,000 to €165,000.
These orders of magnitude highlight the impact of serviced land status versus unserviced land status. Serviced land reduces procedures and may speed up the start of construction.
Mini practical case: land at €90,000 — soil study, servicing and notary fee costs
G1 study: €600–€1,500.
G2 study + soil testing: €2,000–€6,000.
Simple servicing: €5,000–€15,000.
Heavy servicing: €15,000–€50,000.
Notary fees (~7.5%): ≈ €6,750.
Development tax: €2,000–€10,000 (variable).
Total range excluding construction: €102,000 to €165,000. Have quotes prepared and ask for the opinion of a geotechnician and a chartered surveyor.
2026 trends and developments to know for buying building and serviced land for sale
In 2026, the land market varies greatly depending on the area. Peri-urban areas remain attractive. Other areas are experiencing stagnation or adjustments.
Local authorities are increasingly integrating requirements related to climate hazards into PLUs and PPRs. These developments may reduce the effective buildable area.
Servicing costs and technical requirements (drainage, reinforced foundations) are increasing in areas exposed to natural risks.
Local aid or the extension of the PTZ may facilitate access to land for first-time buyers. Ask your advisor about the schemes currently in force.
Regulatory and climate issues
The strengthening of rules on natural hazards requires systematic consultation of the PPR. Technical requirements may include drainage and elevation.
An operational planning certificate provides additional security before purchase, especially in a risk zone.
Land market and recent price benchmarks
Land prices per square meter vary by a factor of one to three depending on the municipality. National benchmarks exist, but local value takes precedence.
For a reliable estimate of land prices, contact a local Capifrance real estate advisor.
Best practices, checklist and mistakes to avoid for a secure purchase
Before signing anything, follow a rigorous building land purchase checklist. Anticipate costs, check documents and provide protective clauses.
Frequent pitfalls: landlocked land without a right of way, undisclosed easements, underestimation of servicing costs, absence of a soil study and lack of knowledge of the local PPR.
Negotiate the seller’s contribution to part of the works or a price reduction in case of constraints. Involve a notary and a surveyor whenever necessary.
Checklist before signing
Obtain the planning certificate (CU).
Consult the PLU and the cadastral map.
Request the title deed and the cadastral extract.
Carry out or include the soil study condition precedent.
Have the land boundary marked by a chartered surveyor.
Request servicing quotes (water, electricity, sanitation, gas, fiber).
Check for easements and urban right of pre-emption.
Consult the PPR and the regulatory diagnostics.
Simulate the financing and plan the personal contribution.
Consult a notary to verify encumbrances and mortgages.
Frequent pitfalls and how to anticipate them
Land sold as “buildable” without an operational CU: solution — require the CU or a condition precedent.
Undisclosed easements: solution — request the statement of encumbrances, the cadastre and the notary’s opinion.
Underestimation of servicing costs: solution — obtain several quotes and plan a safety margin.
If in doubt, call on a Capifrance advisor for a local estimate and contact with experts.
Support and role of a local Capifrance real estate advisor in your land purchase for house construction or leisure use
A Capifrance real estate advisor offers you a local estimate of land prices and an active search for plots of building land for sale.
They connect you with a surveyor, notary and geotechnician. They support administrative procedures and negotiations.
Contact your local Capifrance advisor for a personalized study, a free estimate and support at every step.
Check the planning certificate, the PLU and the easements before making any offer.
Carry out or secure a soil study (G1/G2).
Include servicing costs in your budget.
Insert conditions precedent into the preliminary agreement.
Anticipate constraints related to the PPR and public utility easements.
Request several quotes and compare the options.
Contact a local Capifrance advisor for an estimate and contact with experts.
FAQ
What is the difference between buildable and non-buildable land?
Buildable land is authorized to receive construction according to the local PLU/CU. Non-buildable land (agricultural or leisure land) does not allow construction without a zoning change. Check the planning certificate and the PLU at the town hall.
Is it mandatory to carry out a soil study before buying?
It is strongly recommended to carry out at least a G1 study or to include a soil study condition precedent in the preliminary agreement in order to avoid additional foundation costs.
How can you check easements on buildable land?
Consult the cadastre, request the statement of encumbrances from the notary, ask for the planning certificate and consult the town hall. A chartered surveyor can confirm easements and carry out the boundary marking.
What are the average costs of servicing land?
Costs vary: from a few thousand euros for a boundary connection to €15,000–€50,000 if networks must be created or if the distance to the networks is long. Request several servicing quotes.
What documents should you request from the seller to secure the purchase of buildable land?
Request: cadastral extract, title deed, planning certificate (CU), plans, boundary survey report (if it exists), soil studies (if carried out) and the list of easements. Have these documents checked by your notary.
How does the purchase of buildable land work?
The purchase of buildable land takes place in several stages: checking the PLU and the planning certificate, reviewing the risk status, analyzing access and water networks, then signing a preliminary contract, often in the form of a preliminary sales agreement, before the authentic deed with the notary. To secure the purchase of buildable land, it is useful to provide conditions precedent related to the soil study, financing and compliance of the documents.
Before signing, request the documents for verification: planning certificate, cadastral map, risk statement, any soil study and the seller’s details if the sale is made through an intermediary. Sales advisors and a Capifrance real estate advisor can help you check planning rules, land type, the personal contribution to be planned and the notary fees related to the purchase of land.
Can you buy buildable land without building on it?
Yes, it is possible to buy buildable land without immediately launching a construction project. The landowner does not, in principle, have an obligation to build immediately after buying buildable land; however, if a building permit is obtained, its validity period is generally 3 years, with lapse if the work does not begin within this period or if it is interrupted for more than one year.
In practice, buying buildable land without building may be part of a wealth strategy, a future project or a deferred rental investment. However, you must take into account the holding cost, notary fees, maintenance of isolated land or plots in subdivisions, and check that local planning rules do not change between the land purchase and the future house.
What is the new law on buildable land?
There is not one single “new law” on buildable land. In 2026, the applicable framework is mainly based on local planning rules, the planning certificate, obligations related to soil studies in certain clay-prone areas, as well as land sobriety objectives resulting from the Climate and Resilience law, often summarized by the principle of “zero net artificialization” (ZAN).
In practical terms, for the purchase of buildable land, the most useful “new law” to remember from the buyer’s point of view concerns the soil study: in the event of a sale of undeveloped buildable land located in an area exposed to clay shrink-swell, a prior geotechnical study must be provided and attached to the promise to sell or, failing that, to the authentic deed. This rule directly affects the administrative procedures and the safety of the construction project.
Is it profitable to buy buildable land?
Buying buildable land can be profitable, but it depends on the purchase price, land size, additional costs and your construction project. The right calculation is not limited to the land itself: you must include notary fees, the soil study, servicing, the risk status, administrative procedures and, where applicable, any loan assistance obtained from a bank.
Profitability is often better when the buildable land is well located, already close to water networks and sold with a clear framework regarding the conditions of sale. For the purchase of buildable land intended for a primary residence, the gain is mainly patrimonial. For a rental investment or resale after construction strategy, you need to compare the overall cost with the future price of the finished property and the choice of builder or individual house builders.
How long do you have to build after buying buildable land?
After buying buildable land, you do not automatically have a general obligation to build within a single legal timeframe. However, once a building permit or prior declaration is obtained, the planning authorization is generally valid for 3 years. The work must begin within this period and must not then be interrupted for more than one year.
In practice, the real timetable therefore depends on the date the authorization is issued, not only on the date of land purchase. To avoid any overrun, anticipate the soil study, financing, personal contribution, choice of builder and other administrative procedures from the preliminary sales agreement stage. A Capifrance real estate advisor can help you schedule the signature deadline, permit filing and start of construction in the right order.
Author :
Frédéric Rémy – Director of Commercial Performance
A real estate professional for several years within the Capifrance network, I would like to share with you some essential advice to help you succeed in your real estate project with the support of our advisors.
