Can I install a pool without a declaration?
It depends on the size of the pool. For a private pool: a basin under 10 m² in principle needs no authorisation (except in a protected area); from 10 to 100 m², a prior declaration of works is required; over 100 m², or with a cover over 1.80 m high, you need a building permit. Independently of planning, every in-ground or partly in-ground private pool must have a standard safety device (barrier, alarm, cover or shelter) against drowning.
📋 The rules
- Under 10 m²: no authorisation (except protected zone)
- 10 to 100 m²: prior declaration
- Over 100 m² or cover > 1.80 m: building permit
- In-ground pool: standard safety device mandatory
- The PLU and protected areas can add rules
🔓 Exceptions
- In a heritage/classified site or near a monument, formality even under 10 m²
- Temporary above-ground pools (≤ 3 months/year): often exempt
- Development tax applies depending on the basin's surface
⚠️ Penalties & fines
Building without the required prior declaration or permit brings regularisation, even demolition and fines. Above all, the absence of a safety device on a private in-ground pool is punished by a fine of up to €45,000. The development tax is also due depending on the basin's surface.
📎 Official sources
- Service-Public.fr · Building a private pool →
- Service-Public.fr · Pool safety →
- Légifrance · Article R.421-9 of the Planning Code →
❓ Frequently asked
Do I have to declare a pool?
It depends on the size. Under 10 m²: no formality (except protected zone). From 10 to 100 m²: prior declaration at the town hall. Over 100 m², or with a cover above 1.80 m: building permit.
Is a small above-ground pool covered?
An above-ground pool installed less than three months a year is generally exempt. Beyond that, or if fixed, the usual size thresholds apply. In a protected area, authorisation may be required.
What safety device is mandatory?
Every in-ground or partly in-ground private pool must have at least one standard device: barrier, alarm, cover or shelter. The absence of a device is punished by a fine of up to €45,000.
Is there a tax on pools?
Yes, the development tax applies depending on the basin's surface, and a pool raises the rental value and thus the property tax. Check with the town hall before works to anticipate the cost.
What's the risk without authorisation?
A Planning Code offence: regularisation imposed, even demolition and fines. Better to file the dossier (prior declaration or permit) before digging, the review usually taking a month for a declaration.
🔎 Common searches
What people search to land here:
- “pool without declaration 10m2”
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