Kitchen extraction: the points to check

As soon as there is on-site cooking, extraction (smoke and fume evacuation) becomes a central issue: fire safety, removal of odours and grease, and neighbour comfort. It often determines the type of kitchen a premises can host — and sometimes the feasibility of the project itself. Here are the questions to ask early, before you commit.

Why extraction is a central issue

A professional kitchen produces heat, greasy vapours and odours that must be captured and then evacuated under good conditions. Extraction is therefore not a mere convenience: it touches on safety, hygiene and the neighbourhood.

Depending on the intensity of cooking planned (plancha, deep-frying, open-fire cooking, etc.), the requirements are not the same. Defining your future cooking method early helps frame the rest.

Is there an existing conduit?

A premises already fitted with an extraction conduit (duct) leading to the roof greatly simplifies the project. Without one, creating a conduit can be complex, especially in a multi-storey building: you need a vertical run all the way above the building.

When a conduit exists, its condition matters too: sufficient cross-section, gainage (internal lining), airtightness, and access for maintenance. A conduit that is present but unsuitable cannot always be reused as-is.

What does the copropriété (co-ownership / homeowners' association) say?

At the foot of a building, the règlement de copropriété (co-ownership regulations) often governs the installation or modification of a conduit, since it generally runs through common areas or the façade. Authorisation from the general assembly may be required.

This is a point to check before committing: it may condition the very possibility of cooking on-site, and obtaining approval takes time.

What débouché en toiture (roof outlet) is possible?

The discharge of fumes must take place under conditions acceptable for the building and the neighbourhood. The height of the débouché en toiture (roof outlet) above the ridge, its distance from windows and air intakes, and the orientation of the prevailing winds are technical matters that should be studied.

A poorly placed outlet is a frequent source of neighbour disputes. It is better to design it correctly from the start than to have to redo it.

Ventilation, fresh air and balancing

Extracting air means reintroducing it: without sufficient fresh-air supply, the hood draws poorly, doors slam and comfort deteriorates. Balancing extracted air against make-up air is part of a well-designed installation, alongside the VMC (mécanical ventilation) where relevant.

This air supply, its heating in winter and the acoustics of the equipment must be built into the project — not just the conduit itself.

Grease, maintenance and dampers

Greasy vapours call for capture devices (filters, and where needed a bac à graisse / grease separator) and regular maintenance: cleaning the hoods, sweeping the conduit (ramonage), and maintenance contracts. Keeping the supporting records is good practice, useful in the event of an inspection or a claim.

This maintenance is a recurring cost to anticipate, distinct from the initial investment.

Nuisances and the neighbourhood

Noise from motors and fans, and persistent odours: these are the most common grounds for complaint once the business is running. Anticipating them (choice and placement of equipment, acoustic treatment, a carefully designed outlet) protects the project as much as the neighbourhood.

A conversation upfront with the copropriété (co-ownership) and neighbouring occupants is often simpler than managing a conflict after opening.

What impact on the project?

Extraction influences the type of kitchen possible, the works budget and the timeline. Having it assessed early — ideally before signing the lease — avoids discovering a blocking constraint once you are committed.

In short: a conduit in good condition changes everything; its absence or a restrictive copropriété (co-ownership) should be classified as a priority “to verify”.

How AvantBail can help you

Extraction is one of the costliest points to discover too late. The AvantBail pre-diagnostic helps you flag it as “to verify” from the outset, before you sign.

AvantBail produces the feasibility pre-diagnostic of your premises: what can be confirmed automatically (zoning, history of activity at the address), what is probable, and what remains to be verified on-site. You come away with a clear reading of the points to dig into and the list of authorisations to plan for, before you commit.

And if you want to go further, our team supports you from diagnostic through to opening: choosing the premises, designing the kitchen, and handling regulatory files.

Start your pre-diagnostic today at avantbail.fr — or request a callback to discuss it with an expert.

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Informational and general content: it does not constitute legal, financial or regulatory advice. Rules vary depending on the commune, the building and your project. Always have your situation validated by the relevant professionals (architect, bureau de contrôle / inspection office, lawyer, chartered accountant, town hall).