What Does a Commercial Kitchen Hood and Grease Trap Really Cost in a Buildout?

The Type I vs Type II classification that sets your entire budget

This single decision moves tens of thousands of dollars, and it is locked in the moment you finalize your menu — not at permitting, where most operators discover it too late. The determining question is simple: does your equipment produce grease-laden vapor?

A Type I hood is legally required over fryers, griddles, char-broilers, ranges, woks, and salamanders — anything that vaporizes grease. It triggers the full compliance stack: welded, grease-tight ductwork; a wet-chemical fire suppression system; tempered make-up air; and recurring NFPA 96 cleaning. The hood canopy alone runs $20,000 to $50,000, and the complete package — hood, make-up air, roof fans, welded duct, and suppression — lands at $35,000 to $80,000-plus.

A Type II hood handles heat and moisture only: convection ovens, steamers, and dishwashers that produce no grease. Because there is no grease vapor, there is no fire-suppression requirement, no grease-rated duct, and a far simpler make-up air arrangement. Installed cost typically runs $5,000 to $15,000.

The trap operators fall into is putting a single fryer on the menu and unknowingly triggering the entire Type I package. If your concept can run fryer-free — leaning on convection, combi ovens, or induction — you may legally qualify for Type II and save $30,000 to $60,000. Before you order a single piece of equipment, have your kitchen designer and the local mechanical code official confirm the classification in writing. Menu-driven concepts should model the buildout cost of each path; a fryer that adds $30,000 in permanent infrastructure needs to earn its place on the menu, not sneak on because it feels like a default.

The full Type I cost breakdown, line by line

Practitioners are routinely blindsided because they price the hood and forget the seven other line items that make it functional and code-compliant. Here is what a full Type I system with an exterior interceptor actually costs, itemized:

• Type I hood (canopy, baffle filters): $20,000 to $50,000
• Wet-chemical fire suppression: $4,000 to $10,000, plus roughly $300 to $600 annually for the required inspection
• Make-up air unit (tempered): $8,000 to $25,000
• Rooftop exhaust fan(s) plus welded grease duct: $6,000 to $20,000
• Roof curb, penetration, structural support, fire-rated chase: $5,000 to $20,000
• Gas and electrical connections, controls, and interlocks: $4,000 to $12,000
• Grease interceptor: $500 to $3,000 under-sink, or $10,000 to $40,000-plus for an exterior in-ground tank
• Permits, mechanical engineering, and the balancing report: $5,000 to $15,000

Added together, an all-in Type I system with an exterior interceptor runs roughly $60,000 to $150,000-plus. That range is exactly why a commercial kitchen is the most expensive square footage in any buildout, dollar for dollar — you are installing industrial ventilation, fire protection, and wastewater pretreatment inside a retail box.

The number that most often wrecks a budget is make-up air (MAU). People remember to exhaust the hood but forget that pushing 3,000 to 8,000 CFM out the roof means pulling that same volume of tempered air back in — heated in winter, cooled in summer. A dedicated MAU unit with its gas and electrical hookups can add $15,000 to $30,000 by itself, and many codes mandate 100% make-up air for hoods over 2,000 CFM, removing the cheaper passive-louver option from the table entirely.

Why the grease trap is the sneakiest cost in the whole project

The interceptor tank itself is rarely the worst part of the bill — it is where the code requires it to go. Most municipalities now demand an exterior in-ground gravity grease interceptor sized by fixture count and peak flow, commonly 1,000 to 2,000 gallons and sometimes larger for a busy kitchen. Getting one in the ground means a chain of expensive work:

• Excavation and concrete in a parking lot or sidewalk, which is a large share of the $10,000 to $40,000 figure and often means tearing up and repaving pavement.
• Re-trenching the kitchen waste line so that grease-bearing drains route through the interceptor — and only those drains, because sanitary and restroom waste must bypass it by code.
• Utility and easement conflicts when the building's sewer lateral runs somewhere inconvenient, which can force a longer, costlier connection path.
• Ongoing pump-outs at $150 to $500 per service, typically every one to three months for the life of the operation.

The single most important diligence question: has the building ever housed a restaurant? If not, assume there is no interceptor on site and budget for the full exterior install. Sizing also swings the number — a 100 GPM in-ground unit for a medium restaurant runs $4,000 to $8,000 for the tank alone, versus $2,500 to $5,000 for a 50 GPM unit, and the local sewer district, not you, decides which one you need. Do not lean on the under-sink option unless your local plumbing authority explicitly allows it for your fixture count; getting an in-ground mandate after you have already scoped a cheap under-sink trap is a five-figure surprise dropped into the middle of construction.

Installation labor and structural modifications

Installation labor surprises operators because a hood is never simply bolted into place. Budget $8,000 to $18,000 for hood installation alone, and understand what drives it:

• Structural reinforcement — hoods commonly weigh 300 to 800 lbs and require ceiling or wall bracing. If the existing framing is inadequate, reinforcement adds $1,500 to $4,000.
• Ductwork fabrication and sealing — stainless or galvanized duct running from the hood up to the roof typically costs $5,000 to $12,000, with every joint welded or clamped to satisfy NFPA 96. Long runs or multiple turns push you toward the high end fast.
• Electrical — dedicated circuits for hood lights, exhaust-fan controls, and the suppression tie-in run $2,000 to $5,000, depending on panel capacity and the distance back to the electrical room.
• Plumbing for the grease trap — trenching, concrete cutting, and drainage re-routing for a standard 50 to 100 GPM trap runs $3,000 to $8,000. An above-ground trap is cheaper at $1,500 to $3,000 but eats scarce kitchen floor space.

The lesson operators miss: hood installation labor alone can account for 30% to 50% of total system cost, especially in older buildings with non-standard ceiling heights or difficult roof access. A job scoped as a two-day install routinely stretches to five once concealed structural issues surface — and every one of those days is billed. Older buildings compound this: unexpected framing conditions, undersized electrical panels, and roof structures that cannot carry the fans without reinforcement all live behind finished surfaces where no one can price them until demolition exposes them.

Ongoing maintenance and compliance you have to budget for

The buildout check is the beginning, not the end. Hoods and interceptors carry recurring costs that belong in your operating pro forma from day one:

• Hood and duct cleaning — NFPA 96 requires cleaning every three to six months for heavy-use kitchens running fryers and grills. Each professional visit is $300 to $800, or $1,200 to $3,200 annually. Grease buildup in ducts is a leading cause of restaurant fires, so this is not a line you can skip.
• Grease trap pumping — in-ground traps pumped every one to three months cost $150 to $400 per service, totaling $600 to $4,800 per year. Under-sink traps need manual scraping every two to four weeks (staff labor) or professional cleaning at $100 to $250 a visit.
• Fire suppression inspection — the suppression system requires a semi-annual inspection by a certified technician at $200 to $500 each. Fusible links and nozzles need replacement every five to ten years, adding $1,000 to $3,000 when they come due.
• Exhaust fan and MAU maintenance — belt replacements, motor servicing, and filter changes run $500 to $1,500 annually.

All in, expect $2,500 to $9,500 per year in compliance and maintenance depending on cooking volume and how aggressively your jurisdiction enforces code. Budgeting for it upfront prevents the surprise emergency service call that can hit $2,000-plus in a single visit when a fan fails on a Friday night — and it protects you from the far larger loss of being shut down by a fire marshal for a missed cleaning cycle.

Regional and code variations that swing the number

Location changes both the install and the ongoing bill, sometimes dramatically:

• Urban versus rural — in major metros like New York, San Francisco, and Chicago, labor rates run 30% to 50% higher. Hood installation that costs $15,000 to $25,000 in a smaller city can hit $25,000 to $40,000 downtown. Permit fees swing too: $500 to $3,000 in suburban jurisdictions versus $2,000 to $8,000 in dense urban ones.
• Fire code stringency — some jurisdictions require 2-hour fire-rated enclosures around grease duct, adding $5,000 to $15,000 in shaft construction. Others accept standard duct with fire wrap, which still adds $2,000 to $5,000.
• Grease trap sizing mandates — local sewer districts may require sizing for peak flow rather than code minimum, and a 100 GPM in-ground trap ($4,000 to $8,000) costs meaningfully more than a 50 GPM unit ($2,500 to $5,000).
• Make-up air requirements — codes mandating 100% make-up air for hoods over 2,000 CFM force a dedicated MAU at $10,000 to $20,000, while jurisdictions that permit passive make-up air via wall louvers let you off at $1,500 to $4,000.

Always confirm the specifics with your local fire marshal and building department before you finalize equipment specs. A code variance discovered mid-construction can add $10,000 to $30,000 to a buildout that was already priced and financed — the worst possible time to absorb a new number, because the money is committed and the schedule is already moving.

Make the landlord pay, and don't get screwed at lease-end

The grease interceptor and the exhaust infrastructure are permanent building improvements that outlive your lease. Frame them that way at the negotiating table, because a landlord marketing a space as restaurant-ready should deliver them.

Push the interceptor and roof work to base building. An in-ground interceptor stays with the property forever, and the roof curb, structural support, and exhaust penetration are part of the structure. If the landlord won't fund them outright, amortize the cost into rent at 6% to 9% rather than paying cash up front.

Demand a written delivery condition. Get the lease to specify exactly what the landlord provides: interceptor and its size, gas service and BTU capacity, electrical service, HVAC stub, roof structural capacity for the curb, and the grease waste line. Vague "vanilla shell" language lets a landlord hand you a box that needs $80,000 of infrastructure you assumed was included.

Get a real F&B TI allowance. Restaurant tenant-improvement allowances commonly run $50 to $100-plus per square foot, and far higher for a desirable anchor tenant. Have the landlord fund and amortize anything above the allowance.

Confirm roof and gas capacity before signing. A roof that can't structurally carry the fans and MAU, or a gas service too small for your equipment BTUs, becomes a $20,000 to $60,000 surprise. Make adequacy a landlord representation in the lease, not your risk.

Cap CAM and strike the restoration clause. Negotiate a 3% to 5% cap on controllable CAM, exclude roof, structure, and parking replacement, and reserve an audit right. Then attack the restoration clause: at lease-end it can force you to remove the hood, cap the gas, demo the duct, and abandon the interceptor for $15,000 to $50,000-plus. Negotiate the right to leave the infrastructure in place — it benefits the next tenant — and cap any restoration obligation. Finally, because a full kitchen takes four to eight months through health, fire, and mechanical permitting, negotiate four to eight months of abated rent to cover the dark buildout period.

Related questions

Do I always need an exterior in-ground grease interceptor?

Not always — a small under-sink hydromechanical unit ($500 to $3,000) satisfies some low-flow operations. But most municipalities require an exterior gravity interceptor sized by fixture count and peak flow once you run multiple grease-producing fixtures. Confirm with your local sewer district before assuming the cheaper option.

Can I avoid the whole Type I package?

Only by designing a menu with no grease-laden vapor — no fryers, griddles, char-broilers, or woks. A fully convection- and steam-based concept can qualify for a Type II hood at $5,000 to $15,000 with no fire suppression, saving $30,000 to $60,000. Have the mechanical code official confirm eligibility first.

How long does a full kitchen buildout take?

A complete Type I kitchen typically runs four to eight months, driven by health, fire, and mechanical permitting rather than construction itself. Sequence permits early and negotiate matching abated rent, because you pay for the space long before you can serve a single cover.

Is used hood equipment worth buying?

Used hoods and traps can cost 30% to 50% less, but factor in inspection, modification, and recertification. Fire-suppression systems often need recertification, and used interceptors may not meet current local code. Once those costs land, the real savings frequently shrink to a modest margin.

What single line item blows up kitchen budgets most?

Make-up air. Exhausting 3,000 to 8,000 CFM out the roof requires pulling the same volume of tempered air back in. A dedicated MAU with gas and electrical hookups adds $15,000 to $30,000 that first-time operators almost never see coming.

FAQ

What is the typical price range for a commercial kitchen hood system? A standalone Type I hood canopy runs roughly $20,000 to $50,000, but that is only the hood. Once you add welded ductwork, rooftop exhaust fans, tempered make-up air, and fire suppression, a complete Type I package lands at $35,000 to $80,000-plus. Custom sizes and high-CFM requirements push costs higher.

How much does a grease trap usually cost for a new buildout? A small under-sink hydromechanical interceptor runs $500 to $3,000. Most jurisdictions require an exterior in-ground gravity interceptor of 1,000 to 2,000-plus gallons, which costs $10,000 to $40,000-plus installed because of excavation, concrete, and drainage re-routing — not the tank itself.

Are there ongoing costs besides the initial purchase? Yes. NFPA 96 hood and duct cleaning runs $300 to $800 every three to six months, grease trap pumping runs $150 to $400 every one to three months, and semi-annual fire-suppression inspection runs $200 to $500. Total annual maintenance typically lands between $2,500 and $9,500.

Do I need both a hood and a grease trap? In most jurisdictions, yes. Any kitchen with grease-producing cooking requires a Type I hood with fire suppression, and local plumbing codes almost always mandate a grease interceptor sized to your flow. Only a fully grease-free, Type II operation may sidestep the full requirement.

Can I save money buying used or refurbished equipment? Used hoods and traps can cost 30% to 50% less, but inspection, modification, and recertification erode the savings. Fire-suppression systems frequently need recertification, and used interceptors may not meet current code, so verify everything with a licensed contractor before committing.

How do location and building type affect the total cost? Significantly. Major-metro labor adds 30% to 50%, older buildings often need structural reinforcement or longer duct runs, and local fire and sewer codes dictate fire-rated enclosures, interceptor sizing, and make-up air rules. Always get multiple quotes from contractors fluent in your local health and fire codes.

Sources

• https://www.nfpa.org/codes-and-standards/nfpa-96-standard-development/96
• https://codes.iccsafe.org/content/IMC2021P1/chapter-5-exhaust-systems
• https://www.epa.gov/npdes/national-pretreatment-program
• https://iapmo.org/uniform-plumbing-code
• https://www.rsmeans.com/
• https://www.cbre.com/insights
• https://www.us.jll.com/en/industries/retail
• https://www.cushmanwakefield.com/en/united-states/insights
• https://www.boma.org/

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