Do you own a building plot and want to sell it for the best possible price? Selling building land requires careful preparation. From verifying whether the land is buildable to boundary surveying, mandatory soil studies, utility connections and taxation, there are many steps involved—and a single mistake can delay the sale or discourage potential buyers.
To help you successfully complete your project, we have put together this comprehensive checklist covering every step, required document and best practice. From the first checks at the local town hall to signing the final deed before a notary, here is everything you need to know to sell your building land smoothly, quickly and at the right price.
Planning to sell land? Get end-to-end support from a local Capifrance real estate advisor.
Do you want to sell a house with a large plot of building land? Start with an online property valuation, and a Capifrance expert will contact you to carry out a more detailed assessment and determine the exact value of your property.
Data updated for 2026
In summary
- Check whether the land is buildable first: the Local Urban Development Plan (PLU) and the planning certificate are essential starting points before spending any money.
- Plan ahead for the key requirements: boundary surveying by a licensed surveyor, a G1 geotechnical soil study (mandatory in clay shrink–swell risk areas), and an assessment of utility connections.
- Prepare a complete file: risk reports, easements, pre-emption rights, title deeds and cadastral documents reassure buyers and help speed up the sale.
- Anticipate taxation: building land sales are subject to capital gains tax. Have your notary calculate the expected tax from the outset.
- The best approach? Work with a local real estate advisor who can manage the entire sale from start to finish, ensuring the right price and the shortest possible timeframe
Selling building land: what you need to know before getting started
Before diving into the checklist, here are a few key points to help you begin on the right footing.
What is building land?
Building land is a plot on which construction is legally and technically possible. To qualify as buildable, the land must meet several cumulative criteria:
- a legal requirement, meaning the plot must be located in an urban ("U") or future development ("AU") zone under the Local Urban Development Plan (PLU), or in a buildable area in municipalities without a PLU;
- an access and servicing requirement, meaning the plot must have access to public roads and be capable of being connected to essential utility networks;
- a technical requirement, meaning the ground conditions must be suitable for construction.
As a result, land may be considered "buildable" on paper while still requiring additional work or verification before construction can actually begin.
Why preparation makes all the difference
Selling land is very different from selling a house. Buyers—whether private individuals planning to build or property developers—need precise guarantees regarding boundaries, confirmed buildability, soil conditions and utility connection costs.
The more complete and transparent your documentation, the more confidence you inspire, allowing you to sell faster and at the right price. Conversely, an incomplete file creates uncertainty, increases conditional clauses and often leads to negotiations for a lower purchase price.
Key takeaway
- Building land must satisfy legal, access/utility and technical requirements.
- A complete file is your strongest asset for selling quickly and under the best possible conditions.
The complete checklist for selling building land
Here is everything you need to prepare, step by step.
1. Check whether the land is buildable (PLU and planning certificate)
This is the essential first step: there is no point in spending money if the plot is not buildable.
Consult the Local Urban Development Plan (PLU or PLUi) at your local town hall or on the French Urban Planning Geoportal, then apply for a planning certificate (Certificat d'Urbanisme – CU).
An informational planning certificate outlines the planning rules applicable to the land, while an operational planning certificate confirms whether a specific project can be carried out on the plot.
The certificate also provides information about easements, planned municipal developments and any pre-emption rights affecting the property. Speaking directly with the local planning department is the best way to confirm all these points.
2. Have the land professionally surveyed
A boundary survey carried out by a licensed surveyor officially establishes the exact boundaries and surface area of the plot.
It helps prevent disputes with neighbouring owners and gives buyers confidence by clearly defining what they are purchasing.
Costs generally range between €500 and €1,500, depending on the size and complexity of the land.
The survey may be carried out amicably or, if there is disagreement between neighbours, through legal proceedings. Although it can be included as a condition in the preliminary sales agreement, completing it before marketing the property is always preferable.
3. Carry out the mandatory soil study (ELAN Act)
Since the introduction of the ELAN Act, a G1 geotechnical soil survey has been mandatory when selling building land located in areas exposed to clay shrink–swell risk (classified as medium or high risk).
Paid for by the seller, this study must be attached to both the preliminary sales agreement and the final deed of sale.
Good to know: the official mapping was updated by ministerial decree in January 2026, and the new zoning applies to sales completed from 1 July 2026. As a result, the proportion of metropolitan France affected has increased from around 48% to approximately 55%.
A G1 study generally costs between €1,000 and €2,000.
Its purpose is to protect buyers by identifying any soil constraints and the construction precautions that may be required.
4. Assess utility connections
A plot is considered serviced when it is connected to the essential utility networks:
- Water supply
- Electricity
- Sewerage (public sewer or individual wastewater treatment system)
- Gas
- Telecommunications and fibre broadband
You may choose to sell the land already serviced—which generally increases both its value and attractiveness—or unserviced, allowing the buyer to organise the connections themselves.
Always specify whether utilities are available at the property boundary or whether the land is fully serviced.
Connection costs vary considerably depending on the distance from existing networks, typically ranging from €5,000 to €40,000, or even more for isolated plots.
One important point: who pays for the utility connections is negotiable, but this must be clearly stated in the offer or preliminary sales agreement.
5. Gather all mandatory documents
Unlike a house, undeveloped land requires relatively few mandatory reports, but some documents are essential.
Prepare the Environmental Risk Report (ERP) covering:
- Natural hazards
- Mining risks
- Technological risks
- Seismic risks
- Radon exposure
Disclose any known history of pollution or previous agricultural, industrial or storage activities.
You should also gather:
- The title deed
- The cadastral extract
- The boundary survey plan
- The planning certificate
- Information relating to easements
- Details of any Urban Pre-emption Right (DPU)
A complete file is the key to a smooth and efficient sale.
6. Determine the right asking price
Building land is valued differently from residential property.
Its market value depends on several factors, including:
- Surface area
- Actual development potential (permitted building footprint and PLU regulations)
- Level of servicing
- Accessibility
- Soil conditions
- Above all, local market demand
Base your valuation on comparable local sales (using the DVF database where available) and, ideally, obtain a professional valuation.
Setting the right price from the outset attracts qualified buyers and prevents the property from remaining unsold for an extended period.
Capifrance's online valuation tool provides an initial estimate, which can then be refined with the help of a local advisor.
7. Write an effective listing and maximise exposure
A successful property listing highlights exactly what buyers are looking for, including:
- Exact surveyed surface area
- Confirmed buildability (planning certificate)
- Level of utility servicing
- Location
- Orientation
- Any restrictions or constraints affecting the plot
Include a clear site plan and high-quality photographs.
The more transparent and detailed your listing is, the more qualified your enquiries will be—and the less time you will waste on unnecessary viewings.
8. Secure the preliminary agreement and final sale
The sale of building land follows the same legal process as the sale of a house.
It begins with a preliminary agreement (either a unilateral promise to sell or a preliminary sales contract), followed by the signing of the final deed before a notary.
Include any relevant conditions precedent, such as:
- Obtaining an operational planning certificate
- Receiving planning permission
- A satisfactory soil survey
- The buyer obtaining financing
The notary checks for any outstanding mortgages, handles any applicable pre-emption procedures through the declaration of intention to sell (DIA), and ensures that the transaction is legally secure.
Key takeaway
The essential steps are:
- Planning certificate (CU)
- Boundary survey
- G1 soil study
- Utility servicing assessment
- Complete documentation
- Accurate valuation
- High-quality property listing
- Notary
Allow at least four to six months between putting the land on the market and signing the final deed.
Taxation: plan ahead for capital gains tax when selling building land
This is a point that should never be overlooked.
The sale of building land by a private individual falls under the capital gains tax regime. The capital gain (the difference between the purchase price and the sale price) is subject to 19% income tax and 17.2% social contributions, resulting in a combined rate of 36.2% before any allowances.
Tax relief increases according to the length of ownership, leading to full exemption after:
- 22 years for income tax;
- 30 years for social contributions.
Unlike a primary residence, building land does not benefit from any exemption on that basis.
Depending on the municipality, an additional tax on land that has become buildable may also apply.
The best approach is to ask your notary to calculate your expected capital gains tax before putting the land on the market. This will give you a clear picture of your actual net proceeds from the sale.
Serviced or unserviced land, single plot or multiple lots: making the right choices
Before selling, there are two important decisions to consider.
The first concerns utility servicing.
A serviced plot generally sells faster and at a higher price, but requires you to cover the connection costs in advance. An unserviced plot is simpler to sell from your perspective, although its market value will usually be lower because the buyer must arrange and finance the utility connections.
The second decision is whether to subdivide the land into several plots to maximise its value.
This can be an attractive option, provided the subdivision complies with the Local Urban Development Plan (PLU), each lot has independent access, and, where necessary, easements are created.
The best option depends on your local market and your objectives. A real estate advisor can help you determine the most suitable strategy.
Common mistakes to avoid when selling building land
Some mistakes occur time and time again.
Selling without an up-to-date planning certificate may result in unpleasant surprises regarding the land's buildability. Obtain one before marketing the property.
Failing to carry out a boundary survey increases the risk of disputes over property lines.
Forgetting the mandatory soil study in clay risk areas can simply prevent the sale from going ahead.
Underestimating utility connection costs may distort negotiations, so obtain quotations in advance.
Ignoring easements or pre-emption rights can delay—or even jeopardise—the transaction.
Finally, overpricing the land by valuing it like a house often leaves it sitting on the market for months.
The best way to avoid these pitfalls is careful preparation, ideally with the support of an experienced professional.
Key takeaway
The most common mistakes include:
- No planning certificate (CU)
- No boundary survey
- Missing mandatory soil study
- Poorly estimated utility connection costs
- Overpricing the land
Professional guidance helps you avoid all of these issues.
Get end-to-end support from a Capifrance advisor
As you can see, selling building land requires organisation, attention to detail and a solid understanding of both regulations and the local property market.
This is precisely where professional support makes all the difference.
A local Capifrance real estate advisor assists you throughout every stage of the sale:
- Verifying whether the land is buildable
- Coordinating the boundary survey and soil study
- Assessing utility servicing
- Preparing the sales file
- Determining the right asking price
- Writing and promoting the property listing
- Selecting qualified buyers
- Negotiating the sale
- Liaising with the notary until completion
With in-depth knowledge of the local land market, your advisor helps you avoid costly mistakes and ensures every step of the transaction is handled efficiently—allowing you to sell at the right price, within the best possible timeframe and with complete peace of mind.
To prepare and manage your sale from start to finish, contact a Capifrance real estate advisor near you.
Conclusion
- Verify that the land is buildable (PLU and planning certificate) before taking any further steps.
- Plan ahead for the boundary survey, G1 soil study and utility servicing, which are essential when selling building land.
- Prepare a complete file (ERP, easements, urban pre-emption rights and cadastral documents) to reassure buyers.
- Set the right asking price and anticipate capital gains tax with your notary.
- Work with a Capifrance advisor for smooth, end-to-end support throughout the sale.
FAQ
What steps are involved in selling building land?
You should first verify that the land is buildable by consulting the PLU and obtaining a planning certificate. Next, arrange for a boundary survey, carry out the mandatory soil study if the land is located in a clay risk area, assess utility servicing, gather all required documents (risk report, easements and cadastral records), determine the right asking price, publish a detailed listing and complete the transaction before a notary.
Is a soil study mandatory when selling building land?
Yes. A G1 geotechnical soil study is mandatory under the ELAN Act when selling building land located in areas exposed to medium or high clay shrink–swell risk. These areas now represent around 55% of metropolitan France under the zoning that came into effect on 1 July 2026. The study must be paid for by the seller and attached to the deed of sale.
Is a boundary survey required before selling land?
A boundary survey carried out by a licensed surveyor is not always legally mandatory, but it is strongly recommended. It establishes the exact boundaries and surface area of the land, prevents disputes and reassures buyers. Costs generally range from €500 to €1,500. If it has not been completed before the sale, it can be included as a requirement in the preliminary sales agreement.
Should land be serviced before it is sold?
No, this is not compulsory.
A serviced plot, connected to water, electricity, sewerage and other utilities, generally sells more quickly and at a higher price.
An unserviced plot is less expensive because the buyer will be responsible for utility connections, which typically cost between €5,000 and €40,000.
Responsibility for these costs is negotiable and should be clearly specified in the preliminary sales agreement.
What taxes apply when selling building land?
The sale is subject to the capital gains tax regime, including 19% income tax and 17.2% social contributions, with tax relief increasing according to the length of ownership (full exemption after 22 years for income tax and 30 years for social contributions).
Some municipalities may also levy an additional tax on land that has become buildable.
Ask your notary to calculate your tax liability before selling.
Why work with a real estate advisor when selling land?
A local Capifrance advisor has expert knowledge of planning regulations, soil studies, utility servicing and the local land market.
They manage every stage of the sale—from valuation and documentation to marketing, negotiations and coordination with the notary—ensuring a secure, efficient and stress-free transaction.
Information accurate as of the publication date (2026). Planning regulations, soil study requirements and tax rules are subject to change and may vary between municipalities. For advice tailored to your situation, contact your local town hall, your notary and a Capifrance real estate advisor with expertise in your local property market.
Auteur :
Frédéric Rémy – Director of Commercial Performance
"With many years of experience in the real estate industry and within the Capifrance network, I am pleased to share essential insights and practical advice to help you successfully achieve your real estate goals alongside our advisors."
