Buying a home or starting a project in France can feel exciting… until the paperwork starts.
Suddenly you’re faced with unfamiliar terms, multiple applications, and rules that seem stricter than expected. Many expats assume they can “just get started” — but in France, that’s where problems begin.
This guide breaks down the four key planning documents you’ll come across, in plain English — including how long each one is valid for (which is where many people get caught out).
Why Planning Permission Matters in France
France takes urban planning seriously. Even small changes to your property may require approval.
If you skip the process, you could face:
- Fines
- Delays when selling
- Or even being required to undo completed work
The good news? Once you understand the basics, it’s much more manageable.
The Plan Local d’Urbanisme (PLU) – The Rules for Your Area
Think of the PLU as the rulebook for your commune.
It tells you:
- Whether land is buildable
- What type of buildings are allowed
- Height, size, and appearance restrictions
Each commune has its own PLU, so rules vary depending on location.
👉 Important: The PLU doesn’t “expire” for you personally — but it can change over time, which means what’s allowed today might not be allowed in the future.
Simple takeaway:
Always check the PLU before buying or planning anything.
The Certificat d’urbanisme – Your First Check
This is often the first step before buying a property or starting a project.
It tells you:
- Planning rules that apply to the land
- Whether your project is likely to be approved
- Available utilities (water, electricity, etc.)
There are two types, but you don’t need to overthink it — just know it gives you clarity before you commit.
👉 Validity:
A certificat d’urbanisme is valid for 18 months.
During that time, the planning rules it confirms are “frozen” for you — even if local rules change.
Simple takeaway:
This is your safest starting point to avoid expensive surprises.
The Déclaration préalable – For Small Projects
This is used for smaller works, such as:
- Minor extensions
- Changing windows or doors
- Installing a pool, shed, or fence
It’s a lighter process than a full building permit, but it’s still an official approval.
👉 Validity:
Once approved, a déclaration préalable is valid for 3 years.
- You must start work within that time
- You can request extensions (usually twice, 1 year each)
Simple takeaway:
Just because it’s “small work” doesn’t mean you can skip this step.
The Permis de construire – For Bigger Projects
This is required for larger or more complex work, including:
- Building a new house
- Large extensions
- Major structural changes
It involves more detailed plans and takes longer to process.
👉 Validity:
A permis de construire is also valid for 3 years.
- Work must begin within that period
- Extensions are possible (again, usually up to 2 extra years total)
Simple takeaway:
If your project is significant, this is the approval you’ll need.
Quick Summary (Keep It Simple)
- PLU → The local rules (can change over time)
- Certificat d’urbanisme → What’s allowed (valid 18 months)
- Déclaration préalable → Small projects (valid 3 years)
- Permis de construire → Big projects (valid 3 years)
Common Mistakes Expats Make
- Assuming rural properties have no restrictions
- Starting work before approval is granted
- Not checking the PLU early enough
- Buying land that isn’t actually buildable
- Letting permissions expire before starting work
Final Thoughts
French planning procedures can feel complicated at first — but they follow a clear structure once you understand the basics.
The key is knowing:
- Which permission you need
- And how long you have to use it
Miss those details, and it can cost you time, money, and a lot of stress.
For govt information about planning, click HERE.
Thinking of buying a property to renovate?
If you’re unsure what permission your project needs — or you want to avoid making a costly mistake — I can help you figure it out quickly and clearly.
Just get in touch, and we’ll make sure you’re on the right track before you start 👍
For more information about everyday problems in France, check out our other BLOG ARTICLES.