Commercial Kitchen Requirements: Ventilation, Utilities and Layout Checklist

Commercial kitchen requirements are set by local authorities, not by any single global rulebook, so the most useful thing you can bring to a site is a good list of questions. This post gives you one: what to ask the food-safety authority, what to ask the engineers, and the order to ask in.

This is general information, not legal or tax advice. Rules on food premises, fire, gas and drainage differ by country, state and council. Check current local rules with the relevant authority and a qualified adviser before you sign or build.

Who should you ask first?

Start with the authority that approves food premises, before you hire anyone. Many regulators want plans reviewed before work begins. Delaware's adoption of the US food rules, for example, requires plans and specifications to be submitted and approved before a new build or a converted building becomes a food establishment, and before a remodel where the authority considers it necessary.

The detail varies even within one country. Two councils in Victoria, Australia, publish their own guides. One asks for floor plans at a scale of at least 1:50 and aims to assess them within 15 working days. Another asks for a scale of at least 1:100. Neither is wrong. That is the point: the list in your hands is only as good as the local one.

Ask the authority:

• Do plans need approval before building, converting or altering the premises?
• What scale, detail and finishes schedule do you expect on the drawings?
• How long does review take, and can work begin before it ends?
• Is there a pre-opening inspection, and what must be ready for it?
• Which other approvals sit outside your remit, such as planning, building, fire, gas or alcohol?

What should you ask about ventilation?

Ventilation is a balance between air going out and air coming in, and most mistakes come from designing only the first half. UK Health and Safety Executive guidance on kitchen ventilation says it should remove fumes at the appliance, clear heat, bring in cool clean air and supply enough air for gas appliances to burn properly.

Replacement air is the question most people forget. The HSE says extracted air should be replaced with fresh air from outside, not from dirty areas such as waste storage, and that insufficient make-up air can cause carbon monoxide to build up. Small kitchens may rely on grilles, but fine pest mesh reduces airflow, so grille areas may need to be larger. Bigger kitchens usually need a fan and filter system.

Questions for the ventilation engineer:

• Is there a canopy over every heat and fume source, and what extract rate is calculated from the actual equipment list?
• Where does the replacement air come from, and how is it filtered and tempered?
• Is extraction interlocked with the gas supply? The HSE ties this to a competent person's risk assessment.
• Where does the duct run, and where does it discharge? The HSE says discharge should be high enough to avoid nuisance to neighbours.
• How are grease filters removed, and how is the system cleaned and tested?
• Who holds the design data, so the system can be checked later against its original specification?

Some regulators set thresholds for when a canopy is mandatory. The Hobsons Bay guide, for instance, requires an exhaust canopy where a cooking appliance exceeds 8 kW electrical or 29 MJ per hour of gas. Your jurisdiction may use different numbers, or none. Ask.

The extraction fan is only half the system. The other half is where the air comes from.

Which utilities should you confirm before signing a lease?

Confirm capacity before you commit, because a utility upgrade can cost more than a month of rent. In practice that means five checks:

1. Electrical supply. Is the existing supply and phase enough for the equipment you plan, and who pays for an upgrade?
2. Gas. Is there a supply, what is its capacity, and does the pipework meet local rules for commercial appliances?
3. Water. Is there enough hot and cold water at adequate pressure? The Hobsons Bay guide requires warm running water at hand basins and hot water for washing equipment.
4. Drainage and grease. Where do floor drains run, and is a grease interceptor needed? The same guide says interceptors should sit outside food areas, preferably outside the building.
5. Waste and deliveries. Where do bins live, and how does a delivery reach the kitchen without crossing the dining room?

Put these in writing with the landlord and the utility, not just by phone. If you are still choosing between buildings, our guide on how to choose a restaurant location shows where these checks sit in the wider decision.

What layout and finishes do authorities usually look for?

Authorities generally want a one-way flow and surfaces that can be cleaned. The Nillumbik guide recommends flow from receiving and storage through preparation, serving and disposal, with no unnecessary backtracking. Our guide to commercial kitchen layout goes into the operational side.

The Hobsons Bay guide gives a useful picture of the detail a regulator may expect:

These are one council's reading of one national standard. Treat them as examples of the kind of question to ask, and get your own authority's version.

What should you check about equipment and fire?

Ask which equipment needs approvals, clearances or special installation before you buy it. Gas appliances, for example, should be fitted by a suitably registered engineer. The HSE notes that gas appliance installers need the appliance's air inlet requirements. Fire protection for cooking, including suppression and duct cleaning, is governed by local fire codes, and the fire authority and your insurer may have their own conditions.

Before ordering, share the plan with your equipment supplier. Our commercial kitchen equipment guide covers what to buy new, used or leased, and why the kitchen plan should come first.

What order should you do all this in?

Work from the authority outward, and get answers in writing at each step:

1. Food-safety authority: plan approval and finishes.
2. Planning, fire and building bodies: use, extraction route and escape.
3. Utilities: capacity and upgrade costs.
4. Ventilation engineer and equipment supplier: design from the menu.
5. Landlord: consent for ducts, plant and alterations.
6. Lease signature, only after the above.

Signing first is the sequence that goes wrong: the duct then has nowhere to go and the rent is already running. Treat the lease as the last step, or make it conditional on approvals.

Key takeaways

• Requirements are local. Your job is to ask the right authority the right questions, in writing.
• Find out early whether plans must be approved before building. Many authorities require it.
• Design ventilation as a pair: extraction and replacement air, with a clear discharge route.
• Confirm electrical, gas, water and drainage capacity before you sign a lease.
• Use council guides as examples of the detail regulators expect, not as universal rules.
• Make the lease conditional on approvals, or sign it last.