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Yes, if its ceiling height is more than 1.80 m and it creates a certain floor surface additional.
Increased floor area
Less than 5 m²
Between 5 m² and 20 m²
Make prior declaration in town
More than 20 m²
Request a building permit in town
This maximum of 20 m² is increased to 40 m² in urban areas if your municipality is covered by a local town planning plan (PLU) or a similar document. To find out if your construction project is concerned, first check with the planning department of your town hall or consult its website.
Who shall I contact
To calculate the floor area of your construction project, you can use a calculation method:
Method for calculating the floor area
Ministry of Planning
Warning : if your project is not subject to planning permission, you must consult the local planning plan (PLU) or the planning document in its place at the town hall. Your project must respect the rules of the planning code and the PLU.