Commercial Kitchen Hood Permits: What Drawings You Need

If you are planning a new hood, replacing an old exhaust system, or converting a tenant space into food service, the commercial kitchen hood permit process usually depends on one thing first: clear drawings of the existing space. Before a city or county can review a proposed hood, the plans generally need to show where the equipment will go, how the duct will run, what nearby construction exists, and how the work affects life safety, accessibility, and the rest of the building.

In California, that review can involve more than one department. Building, fire, mechanical, health, and sometimes planning may all have a role depending on the project. That is why owners, brokers, tenant improvement teams, and restaurant operators often start by gathering accurate existing-condition information. FastAsBuilt provides field-measured as-built drawings and measured floor plans across California so your architect, engineer, hood vendor, and permit expediter can work from reliable base files instead of guesswork.

What a commercial kitchen hood permit usually covers

A commercial kitchen hood permit is typically required when you install, replace, relocate, or significantly alter a hood and its related systems. In practical terms, the permit review is not just about the sheet metal canopy over the cooking line. Reviewers usually want to understand the full system and how it interacts with the tenant space and the building.

Depending on the scope, a permit set may need to address:

• The hood type and size
• The cooking equipment served by the hood
• Exhaust duct routing and termination
• Make-up air and overall ventilation
• Fire suppression within the hood system
• Electrical connections and controls
• Gas piping changes, if applicable
• Structural support or roof framing impacts
• Accessibility and path-of-travel implications in the kitchen layout
• Any occupancy, use, or health department issues tied to food service operations

For many projects, the fastest way to lose time is to begin design without a trustworthy base plan. If dimensions are wrong, ceiling conditions are assumed, or the roof penetration is laid out from outdated records, the permit comments tend to multiply. That is one reason commercial building as-built drawings are often the first step.

Why existing-condition drawings matter before hood design starts

Even small kitchen exhaust projects can affect multiple trades. A hood may look simple from the dining room, but behind it are ceiling clearances, grease duct offsets, fire-rated assemblies, roof-mounted fans, shutoffs, and coordination with lighting, sprinklers, and structure. Existing-condition drawings give your consultants a dependable map of what is already there.

For a first-generation restaurant shell, the landlord may have old plans, but they are often incomplete or no longer accurate after past tenant improvements. For a second-generation food space, equipment may have been moved, walls added, soffits lowered, and rooftop equipment replaced over the years. An on-site field measure helps verify what survived from the original record set and what changed in reality.

Accurate as-builts are especially useful when:

• You are taking over an existing restaurant with partial records
• You need to determine whether an old hood can be reused or must be replaced
• You are adding cooking equipment that changes the hood requirements
• You are routing a new grease duct through a tight ceiling or shaft condition
• You need to coordinate landlord approval for roof work or penetrations
• You are budgeting a tenant improvement before full design begins

If you are still collecting due diligence materials, it also helps to understand when landlords need as-built drawings for commercial space and what records may already exist.

The base drawings most teams need for a permit application

Every jurisdiction has its own checklist, but most commercial kitchen hood permit packages begin with a set of existing and proposed drawings. The exact author of each sheet may vary. Some are prepared by an architect or engineer, some by a hood fabricator or kitchen consultant, and some begin as measured as-built plans.

The core existing-condition drawings often include:

• Existing floor plan with overall dimensions, walls, doors, windows, and room names
• Reflected ceiling information or ceiling height notes
• Existing roof plan or roof equipment layout when the exhaust fan discharges above
• Exterior elevations if the duct or louver affects the building facade
• Building sections when vertical duct routing or shaft conditions matter
• Existing utility locations as visible and verifiable in the field

The proposed permit drawings often include:

• Demolition plan, if existing equipment or ductwork will be removed
• Proposed kitchen equipment plan
• Mechanical plan showing hood, ducts, fan, and make-up air
• Fire suppression information for the hood system
• Electrical plan for disconnects, controls, and equipment power
• Plumbing and gas plans if the cooking line changes utility service
• Structural details for roof supports, curbs, or framing modifications
• Code notes, schedules, and manufacturer information required by the reviewer

FastAsBuilt’s role is typically at the front end: we perform on-site laser measurement, then senior drafters produce permit-ready CAD files in PDF and DWG so your design team can build the permit set on a reliable background. If you need a fast starting point, you can review our packages or request a custom quote for a larger commercial scope.

What should appear on the floor plan for hood permit review

The floor plan is usually the sheet reviewers flip to first, because it explains the context of the proposed hood. A strong plan does more than show a rectangle over a cooking line. It should make the entire space legible so the reviewer can see how the hood relates to exits, prep areas, service counters, dishwashing, storage, restrooms, and any adjacent tenant or common areas.

At a minimum, teams often need the plan to show:

• Overall tenant dimensions and room names
• Wall types and door locations
• The exact cooking equipment under the hood
• The hood footprint and reference tags
• Aisle clearances and working space
• The location of fire extinguishers and suppression pull stations, when part of the scope
• Relevant gas, electrical, or plumbing connection points
• Any affected exits or accessible routes

For tenant improvement work, the floor plan may also be part of a broader code review. If the project changes the use of the space, increases occupant load, or shifts the balance between front-of-house and back-of-house areas, your architect may need to coordinate with building officials beyond the hood itself. That broader issue is one reason many teams review as-built drawings for commercial tenant improvements before design gets too far.

Why elevations, sections, and roof information are often critical

Many permit delays happen because the plan set explains the kitchen at eye level but not above the ceiling or on the roof. Kitchen hoods are three-dimensional systems. The duct must rise, offset, maintain clearances, pass through or around building elements, and terminate properly. If the permit reviewer cannot understand that path, comments are likely.

That is why elevation and section drawings are so important. They can help show:

• Hood mounting height and relation to the cooking equipment
• Ceiling heights and soffit conditions
• Duct size changes and vertical routing
• Fire-rated enclosures or shafts, if needed
• Roof curb, fan support, and termination location
• Distance from parapets, neighboring structures, or openings as required by the applicable code and manufacturer instructions

Roof plans matter as well, especially in multi-tenant retail centers and urban commercial buildings where rooftop space is crowded. The new fan location may need landlord sign-off, structural review, and coordination with existing HVAC units, skylights, solar equipment, or membrane warranty conditions. Good measured drawings help the team fit the new work into real rooftop conditions instead of idealized assumptions.

How hood permits connect to broader commercial building code issues

A commercial kitchen hood permit may sound like a narrow mechanical task, but it often touches broader commercial building code concerns. In California, the applicable code path depends on your local jurisdiction, your building type, and the full scope of work. Building departments commonly coordinate with fire officials, and environmental health may review food facility layouts separately from the building permit process.

Common code-related issues include:

• Whether the proposed cooking equipment changes the hood classification needed
• Whether make-up air and exhaust are balanced appropriately
• Whether the project affects fire-resistance-rated assemblies
• Whether the work changes exiting, egress widths, or occupant circulation
• Whether accessibility upgrades are triggered as part of the tenant improvement
• Whether rooftop work creates structural or weatherproofing concerns
• Whether the kitchen layout aligns with health department requirements for food handling

For brokers and owners, this is where basic CRE terms become practical. “Second-generation restaurant,” “vanilla shell,” “TI allowance,” “change of use,” and “landlord work letter” all affect how much existing documentation you will need and who pays for it. A restaurant conversion inside a former retail suite may require much more than a hood sheet. In some cases, teams also need to evaluate whether the work amounts to a larger occupancy or use change. If that question is in play, this overview of as-builts for a change of occupancy is a helpful starting point.

Because local interpretation varies, always confirm permit requirements with the city or county having jurisdiction and with the fire and health reviewers involved in your project.

What role as-built drawings play for brokers, landlords, and TI contractors

Not everyone involved in a restaurant deal is preparing permit sheets, but nearly everyone benefits from accurate existing-condition drawings. Brokers use them during site selection and lease negotiation. Landlords use them to understand roof capacity, penetrations, and common-area impacts. Tenant improvement contractors use them to price demolition, utility work, framing, and schedule risk more accurately.

For due diligence, measured plans can help answer questions like:

• Will a hood fit without moving walls or major utilities?
• Is there a plausible duct route to the roof or exterior?
• Does the existing ceiling plenum look workable?
• Are there visible structural constraints where the curb or fan might go?
• Can the back-of-house layout support the intended menu and equipment package?
• Is the existing restaurant infrastructure reusable or mostly scrap?

For many second-generation restaurant spaces, a measured as-built can save time before lease execution because it gives everyone a shared reference point. It also reduces the chance that pricing is based on a stale landlord PDF from years ago. If your project is specifically restaurant-related, you may also want to read how to get as-built drawings for a restaurant.

Typical permit scenarios where measured drawings help most

Some hood permits are straightforward replacements. Others are really small pieces of a larger commercial renovation. Measured drawings are most valuable when the existing condition is uncertain or when the hood change has ripple effects across the space.

Second-generation restaurant takeover

You are leasing a former restaurant, but no one knows whether the old hood, duct, and fan are code-compliant, sized correctly, or even shown accurately on the plans. A fresh field measure creates a dependable base for the new design team.

Retail-to-restaurant conversion

A former boutique or soft-goods retail suite may need an entirely new back-of-house plan, utility backbone, and exhaust path. Existing-condition plans are crucial because there is usually no prior kitchen infrastructure to rely on.

Menu change with heavier cooking

An operator may be adding charbroilers, fryers, or other grease-producing appliances. That can change hood, duct, and fire suppression requirements and may require a more comprehensive permit package than expected.

Rooftop constraints in a shopping center

The indoor kitchen layout may work, but the roof may already be crowded with HVAC equipment and limited clear paths. Roof measurement and documentation become essential for coordination and landlord approval.

Partial remodel during occupancy

In an operating restaurant, the team may phase work to stay open or shorten downtime. Accurate drawings help separate existing, temporary, and proposed conditions so permit reviewers and contractors understand the sequence.

What FastAsBuilt provides for California commercial projects

FastAsBuilt provides field-measured as-built drawings and measured floor plans across California, with local crews serving Southern California, the Bay Area, and San Diego. Our method is simple: on-site laser measurement first, then senior drafters prepare permit-ready CAD files delivered in PDF and DWG format.

For commercial spaces preparing for hood-related design and permit work, our drawings often provide the existing-condition base your architect, engineer, kitchen designer, or contractor needs. We do not replace the licensed design professionals who prepare the final engineered permit set, but we help them start with accurate dimensions and documented site conditions.

FastAsBuilt options include:

• 2D As-Built Plans starting at $900 for up to 1,500 square feet, then $0.50 per square foot
• Typical 48–72 hour delivery for 2D plans Turnaround times are estimates and may vary based on project complexity and scheduling.
• One revision included with 2D plans
• 3D As-Built Plans starting at $1,500, then $1.00 per square foot
• 3D plans include a 3D model plus 2D floor plans, elevations, and sections
• Typical 3–5 business day delivery for 3D plans
• Two revisions included with 3D plans
• Custom quoting for larger commercial projects, tenant improvements, ADUs, SB9 projects, and other special scopes

If you are comparing options, this guide to as-built drawing costs in California can help you think through scope and pricing expectations.

Frequently asked questions

Do I need as-built drawings just to replace an existing kitchen hood?

Sometimes a simple like-for-like replacement is more limited, but many projects are not truly like-for-like once the team checks dimensions, duct routing, roof equipment, suppression, and current code expectations. If the existing conditions are unclear, measured drawings usually make the permit path easier and reduce redesign later.

Will a hood permit require architectural drawings, or only mechanical sheets?

That depends on the jurisdiction and the project scope. Some permit applications can focus heavily on mechanical and fire suppression information, while others also require architectural, structural, electrical, plumbing, and accessibility documentation. If walls, ceilings, exits, utilities, or the roof are affected, expect a broader plan set.

Can old landlord plans be used instead of a new field measure?

They can be useful as reference documents, but they are often outdated. Restaurants and other commercial spaces change frequently, especially after multiple tenant improvements. A current field measure helps your team verify what exists now, which is the condition permit reviewers care about.

Are health department drawings the same as building permit drawings?

Not always. Health department review often focuses on food facility layout, sanitation, equipment, and operational concerns, while building and fire review focus on construction, life safety, ventilation, and system installation. Some information overlaps, but most projects need coordination across multiple reviewers.

How quickly can FastAsBuilt deliver measured plans for a restaurant or tenant space?

Our typical delivery for 2D As-Built Plans is 48–72 hours, and 3D As-Built Plans are typically delivered in 3–5 business days. Timing can vary with project size and complexity, especially for custom commercial scopes.

Turnaround times are estimates and may vary based on project complexity and scheduling.

Bottom line

A commercial kitchen hood permit is rarely just about the hood alone. In California, approvals often depend on how clearly your drawings explain the existing space, the proposed equipment, the duct path, the roof conditions, and the code impacts across the tenant improvement. FastAsBuilt helps owners, brokers, contractors, and design teams start with accurate field-measured as-built drawings so permit work can move forward on a reliable foundation.