Unauthorised work can be approved in France

Building a garden shed requires permission if over 20m2

Those long-ago home improvements could come back to bite you when you decide to sell if you did not get planning permission.

Extensions, conservatories, garages, conversions of existing garages into new rooms and some swimming pools, fences and entrances are among improvements that can need planning consent.

Generally only very small construction work of a few square metres requires no formalities. Above that, typically works of up to 20m2 require a simple déclaration préalable to your mairie. Above 20m2, work needs planning permission.

The local administration has the option to refuse the work within one month of receipt of a déclaration (see column right).

Even simple work such as installing a roof-light window requires a déclaration because it is regarded as an change to the appearance of ...

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