You’ve found the stone farmhouse in the Lot, or the village house in Provence with a sunlit terrace waiting to become a swimming pool. Before the first wall is touched, one question quietly decides the shape of your project: what can you actually build, and under which permit? Planning Permission in France is not a formality. It’s a layered system, part national code and part local rulebook, and it rewards buyers who understand it before they sign.
For a foreign buyer handling a renovation remotely, the paperwork can feel abstract. The good news: with the right reading of the local plan and a trusted network on the ground, most projects move forward cleanly. Let’s walk through what you really need to know.
Do you need planning permission in France?
In most cases, yes, as soon as you build new, extend, or change the external appearance of a building. The thresholds depend on the type of work, the surface created, and the Plan Local d’Urbanisme (PLU), the local zoning plan that every commune (municipality) applies on top of the national rules.
Permis de construire or déclaration préalable
Two main permits structure the system. The permis de construire (building permit) is required for a new house, for most extensions above 20 m² of created floor space, and for heavier structural work. The déclaration préalable de travaux (prior declaration) covers smaller operations: minor extensions, a new window, a change of facade color, a pool under 100 m².
The 20 m² threshold is the general rule. Inside the built-up zones of a commune with a PLU, it rises to 40 m² for an extension to an existing house, provided the total surface stays under 150 m². Push past 150 m² of total floor area and the file must be signed by an architect.
Works that need no permission
Some work slips below the radar: interior refreshes that don’t touch the external shell, maintenance, like-for-like roof repairs with identical materials, and very small structures (typically under 5 m² of footprint and under 12 m high). Even then, protected zones can tighten the rules, so it’s worth checking before you lift a hammer.
→ Good to know
Before you make an offer on a property, ask the mairie (town hall) for a certificat d’urbanisme opérationnel. It tells you, in writing, what you can legally build on that parcel.
How does planning permission work in France?
The process is standardized at national level but decided locally. That duality is the single most important thing to grasp.
Who decides
The maire (mayor) signs the decision in the name of the commune, on the basis of the PLU. In communes without a PLU, the national rules (Règlement National d’Urbanisme) apply, and the decision can involve the Préfet. In protected areas, a separate authority weighs in, which we’ll cover below.
Who files
You, the owner, file the application. In practice, your architect, your maître d’œuvre (project manager), or your advisor on the ground prepares and submits the dossier. Many communes now accept filings through a national online portal; others still take paper. The mairie issues a récépissé de dépôt (filing receipt) with a reference number and the official starting date of the review.
What goes in the file
A complete dossier typically includes:
- The CERFA form matching your project type (permis de construire or déclaration préalable).
- A location plan and a parcel plan showing boundaries, access, and existing structures.
- Elevations, sections, and floor plans of the project.
- A graphic insertion showing the building in its environment, plus photos of the site from near and far.
- A written notice describing the project, materials, colors, and landscaping.
- A thermal study (RE2020) for new builds.
Incomplete files are the main cause of delay. The mairie has one month to ask for missing pieces, which pauses the clock.
How long does planning permission take in France?
The baseline review period is two months for a single-family house and three months for other permis de construire. A déclaration préalable is reviewed in one month. These are the headline numbers; reality is a touch more layered.
When the clock stretches
The review period can be extended if your project sits in a protected zone, if an outside authority must be consulted, or if an environmental assessment applies. In those cases, expect an additional one to five months. The mairie is required to notify you of the extended deadline within the first month.
Tacit approval
If the mairie doesn’t respond within the stated deadline, you can generally obtain a certificat de non-opposition, a certificate confirming tacit approval. Protected zones are a notable exception; silence there does not mean yes.
When is an architect mandatory?
The rule is simple on paper. Hiring a French architect becomes mandatory as soon as the total floor area of the building, after work, exceeds 150 m². It applies to new builds and to extensions that cross the threshold.
Why the 150 m² rule matters for renovations
If you buy a 140 m² stone house and plan a 30 m² extension, you cross the line. The entire project then needs an architect’s signature on the permit application, not just the new part. Factor this into your budget early.
What a French architect actually brings
Beyond the signature, a local architect reads the PLU, negotiates with the mairie and, where relevant, the Architecte des Bâtiments de France. Their fee typically ranges from 8% to 12% of the construction cost for a full mission, less for a permit-only mission. On a complex renovation, that’s not an expense; it’s insurance.
How long does planning permission last in France?
Once granted, your permit is valid for three years. If work hasn’t started by then, or if it’s interrupted for more than a year, the permit lapses.
Extensions of validity
You can request a one-year extension, renewable once, giving you up to five years in total. The request must be filed at the mairie at least two months before expiry. The rules in force at the time of the original permit must still apply, which is usually the case.
What counts as “starting work”
Opening the site, foundations, demolition on site: these count. A simple delivery of materials does not. Keep dated photos and invoices as proof.
After the permit: the three notices nobody tells you about
Getting the permit is a milestone, not the finish line. Three formal steps follow, and skipping any of them creates problems later, often at resale.
Site display (affichage)
From the day the permit is granted, you must post it on a visible panel at the entrance to the site, continuously, for at least two months. The panel must mention the permit number, the surface, the height, and the mairie where the file can be consulted. This display is what triggers the third-party appeal window.
DOC: declaration of opening of work
Before starting, you file a Déclaration d’Ouverture de Chantier (DOC) at the mairie. It confirms that work has started and locks in your three-year validity.
DAACT: declaration of completion
When work ends, you file a Déclaration Attestant l’Achèvement et la Conformité des Travaux (DAACT). The mairie then has three months to contest conformity, five months in protected zones. After that, your work is deemed compliant. Keep the stamped DAACT: a future buyer, and their notaire, will ask for it.
→ On the ground
We photograph the site panel the day it goes up and keep a dated record. It’s a small habit that can save weeks of back-and-forth when you sell your French home.
If a neighbour contests: recours gracieux and recours contentieux
Third parties have two months from the start of the site display to challenge your permit. That window is why the display matters so much.
Recours gracieux
A neighbor can first write to the mairie (and to you, by registered letter) asking the authority to withdraw the permit: that’s the recours gracieux. The mairie has two months to respond. Silence is a rejection.
Recours contentieux
If the neighbor pushes further, they can file a recours contentieux before the administrative tribunal. These proceedings can last twelve to twenty-four months. The claimant must demonstrate a direct, personal interest, which filters out many challenges but not all. A clean dossier and a well-briefed architect are your best defense upstream.
Protected zones and the Architecte des Bâtiments de France
France protects a vast number of landscapes and historic settings. If your property sits within 500 m of a listed monument, in a Site Patrimonial Remarquable, or in certain natural zones, a dedicated authority reviews your project.
Who is the ABF
The Architecte des Bâtiments de France (ABF) is a state architect who issues a binding opinion on projects in protected perimeters. Materials, colors, roof tiles, window joinery, the shape of a dormer: all of it can be regulated down to the detail.
Working with the ABF, not against them
The ABF has a reputation for strictness. In practice, early dialogue works. A pre-filing meeting, a well-presented material board, and traditional choices (lime render, terracotta tiles, wood joinery in the right profile) go a long way. Expect review periods to lengthen by one to two months in these zones.
Pools, sheds and extensions: the cases people ask about
Three categories dominate the questions we receive. Let’s look at each on its own terms.
Swimming pool
A pool with a basin between 10 m² and 100 m² requires a déclaration préalable. Above 100 m², or with a fixed cover higher than 1.80 m, you move to a permis de construire. Pools under 10 m² are generally free of permit outside protected zones.
The taxe d’aménagement (development tax) applies, based on a national flat value of 251 euros per square meter of basin, revised every January, multiplied by the local rates set by the commune and the département. For a 40 m² pool, expect several thousand euros, payable in two installments after the permit.
Garden shed
Below 5 m² of footprint and under 12 m in height: no permit required outside protected zones. Between 5 m² and 20 m²: déclaration préalable. Above 20 m²: permis de construire. Simple on paper, but a shed in a protected zone always needs at least a declaration.
Extensions
Here’s a quick comparison to clarify the thresholds:
| Situation | Up to 5 m² | 5 to 20 m² | 20 to 40 m²* | Above 40 m² or total > 150 m² |
|---|---|---|---|---|
| Permit required | None (outside protected zones) | Déclaration préalable | Déclaration préalable* | Permis de construire |
| Architect mandatory | No | No | No | Yes if total > 150 m² |
*The 40 m² threshold applies only inside built-up zones of a commune covered by a PLU, and only for extensions to an existing house.
Can you get retrospective planning permission?
Yes, it’s possible to file a permis de régularisation for work already done. The mairie reviews it against current rules, which can be stricter than those in place when the work was built. In the worst cases, demolition can be ordered. The cleaner path is always to permit before you build.
→ Worth knowing
When buying, ask the notaire to verify that every visible extension, pool, and veranda has a matching DAACT on file. Unregularized work is one of the most common hidden snags in older rural properties.
Is it easy to get planning permission in France?
Honest answer: yes, when the PLU allows your project. No, when you discover the PLU after buying the land. The system is predictable; it just rewards reading it in the right order.
What makes a file sail through
A project aligned with the PLU, drawings that match the local vernacular, and a mairie consulted early. Rural communes often appreciate a visit before filing; it humanizes the dossier.
What makes a file stall
A design that ignores the local rulebook, missing documents, an underestimated protected zone, or an aggressive extension that crosses the architect threshold without one. Each of these is avoidable with guidance on the ground before you commit to a plot.
FAQ
Do you need planning permission for a pool in France?
Yes, in almost all cases. Between 10 m² and 100 m² of basin: déclaration préalable. Above 100 m²: permis de construire. Expect a taxe d’aménagement calculated on 262 euros per square meter of basin, plus local rates.
Do I need planning permission for a shed in France?
Below 5 m²: no, outside protected zones. Between 5 m² and 20 m²: déclaration préalable. Above 20 m²: permis de construire. In a protected zone, always file at least a declaration.
Do I need planning permission for solar panels in France?
Panels on an existing roof require a déclaration préalable because they modify the external appearance. Ground-mounted installations may require a permis de construire depending on size. In protected zones, the ABF opinion is mandatory and may restrict visibility, color, and placement.
How long does planning permission last in France?
Three years from the date the permit is granted, extendable twice by one year, for a maximum of five years. Work must start within that window and must not be interrupted for more than a year.
Is it easy to get planning permission in France?
It is when your project respects the PLU and the local architectural style. It becomes difficult when the land has constraints you discovered after signing. That’s why reading the certificat d’urbanisme and the PLU before offering on a property is one of the most valuable checks you can run.
Bringing it together
Planning Permission in France is a system you can master, provided you treat it as part of the purchase, not an afterthought. The rules are national; the decisions are local; the details, from the ABF’s opinion to the site panel, make the difference between a smooth project and a stalled one. Each stage has its logic, and each threshold has a reason.
Your French home deserves that level of care. Whether you’re planning a pool in the Luberon, a stone-house extension in the Dordogne, or a full turnkey renovation of a village property, the quality of the file you submit shapes the quality of the life you’ll live inside the walls. Ready to read the PLU of a specific commune, or review a project you already have in mind? Our team on the ground is here to bring clarity and peace of mind to every step, from the first certificat d’urbanisme to the final DAACT.