Planning permissions
Prior declarations, building permits, extensions, roof raising, change of use. The file is assembled in full — forms, drawings and notices — and lodged at the town hall. Before that, a feasibility study says whether it will pass.
Planning permissions
The file to lodge, assembled in full and lodged at the town hall. First, the question that matters: will it pass? The feasibility study answers it, and its cost is deducted from what follows.
Site visit, local plan analysis, written note, siting sketch.
Prior declaration (DP)
Complete file lodged at the town hall.
CERFA form, PCMI documents 1 to 8, notices. Within the threshold below.
Amending permit
Amended documents and file reconciliation.
What needs a permission
- 01
Extending: adding on, raising the roof
The floor area created sets the procedure; the local plan sets the rest: height, footprint, appearance.
- 02
Changing the use of a space
A garage turned living room, a shop turned flat: the use matters as much as the works.
- 03
Altering a façade or a roof
A new window, a conservatory, new joinery: a prior declaration is often enough.
On-site visits for surveys, meetings and site supervision.
- Lyon
- Paris
Elsewhere in France, and remotely for drawing work.
Kelliane Guerin holds the French State architecture diploma (architecte D.E., ENSA Lyon) and is not on the Order’s register. Private individuals building for themselves must engage a registered architect once the whole exceeds 150 m² of floor area or footprint — the total after works, not the extension alone. A company must engage one whatever the area. Below that, nothing stands in the way; above it, the project is carried by a registered architect as its author, and the studio works alongside them. Better said here than discovered at lodging.
How it works
- 01
You write
The place, the brief, the timeline: three lines are enough. Reply within 48 h.
- 02
First exchange
A call or a coffee at the studio: framing the need, the budget and the right level of service.
- 03
Visit & proposal
On-site survey, then a clear proposal: scope, phases, fees.