Caterer permits in Seattle, Washington

The city and county permits, taxes, and inspections a caterer needs in Seattle (King County), on top of the statewide Washington and federal credentials covered on their own pages.

Local feesAbout $1,500 to $2,500 in first-year local fees if you lease a licensed commissary (the $945 county permit, $504 plan review, and $73 city license); building your own commissary instead runs $20,000 to $60,000 or more.CountyKing County

This page covers only the Seattle city and county permits for caterers. The statewide Washington credentials and the federal credentials every caterer needs are on their own pages.

What you need to run a caterer in Seattle

CredentialLevelFeeRenewal
King County Food Establishment Permit, Caterer (your commissary kitchen)County$945 a year for a full-service caterer at Risk 3 (cooking from raw, hot-holding, and cooling); lower-risk catering operations fall to lower tiers. The fee is set by risk level, not seat count, and is prorated in the first year (permit year April 1 to March 31)Annual (permit year April 1 to March 31)
King County Food Service Plan Review (field plan review)County$504 for the first 2 hours of field plan review, then $252 an hour beyond, for a caterer leasing a licensed kitchen; building a new commissary from scratch instead pays the new-construction plan review of $1,008 for the first 4 hours plus $252 an hourOne-time per build, or again on a material menu or facility change
King County Temporary Food Establishment Permit (only when you serve the public)CountyPer single event by handling level: $126 minimal, $315 moderate, $441 complex. A year-round option for caterers working the event circuit runs $1,008 for an unlimited complex package plus a $126 Certified Booth Operator course (valid 2 years). Late fees run $50 to $100Per event, or per calendar year for the multi-event and unlimited packages
City of Seattle Business License Tax CertificateCity$73 for a new business at the lowest 2026 tier (half that if you open July 1 or later); renewal scales with prior-year Seattle taxable revenue, plus $10 per extra location. A caterer with no Seattle location grossing $4,000 or less a year in the city is exemptAnnual (expires December 31)
City of Seattle Business and Occupation (B&O) TaxCity0.342% of Seattle taxable gross receipts under the retail services classification for 2026 through 2032, with no tax owed under $2 million in taxable revenue and a $2 million standard deduction above it; the return is filed even when no tax is dueQuarterly or annual filing through FileLocal
SDCI Construction Permit, Change of Occupancy, and Certificate of OccupancyCityValuation-based on the construction work plus hourly review fees, estimated through the SDCI fee tool; a mechanical permit for the kitchen hood and duct adds a fire-review surchargeOne-time per project; the Certificate of Occupancy holds until the use changes
Seattle Public Utilities Grease Interceptor and Side Sewer PermitCityNo standalone program fee; the interceptor is a contractor cost, plus an SPU side sewer permit (priced by scope) to connect or modify the sewer lineOne-time install; ongoing maintenance, cleaned before grease passes 25 percent of volume under SMC 21.16.310
Seattle Public Utilities Backflow Prevention AssemblyCityNo SPU fee for the requirement; the install needs a plumbing permit and a Washington-certified tester does the annual test at the owner's expenseAnnual test by a certified tester, with SPU inspection before the assembly goes into service
Seattle Liquor License Local Authority Objection (only if you serve alcohol)CityNo separate city fee; the objection step is part of the state LCB license processApplies at the initial application; renewal objections are filed 30 days before the license expires
Seattle Fire Operational Permit (commercial kitchen Type I hood)OperationalAn annual Seattle Fire operational permit, plus the SDCI mechanical permit for the hood and duct install with a fire-review surcharge; confirm current amounts with the departmentsAnnual operational permit; one-time mechanical permit for the install

A typical caterer in Seattle, Washington needs 23 separate credentials to operate legally, and that is for one location. Federal, statewide, and local Seattle requirements all stack on the same caterer, each with its own renewal date, fee, and issuing agency.

Do you trust a spreadsheet and a calendar reminder for each permit?

Each caterer credential in Seattle, explained

Grouped by the level of government that issues it, county then city. Every credential here is specific to operating a caterer in Seattle, Washington.

County level

3 credentials

King County Food Establishment Permit, Caterer (your commissary kitchen)

A Seattle caterer pulls its food permit from the county rather than the city, since Public Health Seattle and King County is the lone food-safety authority operating inside the city limits. A caterer is priced on its own risk-based catering line rather than the restaurant seat-band schedule, and a full-service operation that cooks from raw, hot-holds, and cools lands at Risk 3 at $945 a year. You apply with a use of commissary or shared-kitchen agreement, a kitchen floor plan, and your menu. A caterer leasing space in an already-permitted commissary does not separately permit that kitchen; it names the commissary on its own catering permit and pays its own annual fee.

Fee
$945 a year for a full-service caterer at Risk 3 (cooking from raw, hot-holding, and cooling); lower-risk catering operations fall to lower tiers. The fee is set by risk level, not seat count, and is prorated in the first year (permit year April 1 to March 31)
Renewal
Annual (permit year April 1 to March 31)
Processing
Issued after a field plan review and a passed pre-operational inspection, typically 1 to 3 weeks out

King County Food Service Plan Review (field plan review)

Every new catering permit needs a field plan review so Public Health can confirm the commissary kitchen suits your proposed menu and equipment. A caterer leasing a kitchen already permitted as a permanent food establishment usually skips the full new-construction review and pays only the field plan review fee, with the county verifying the kitchen against your specific menu during the visit. A caterer building its own commissary pays the higher new-construction plan review.

Fee
$504 for the first 2 hours of field plan review, then $252 an hour beyond, for a caterer leasing a licensed kitchen; building a new commissary from scratch instead pays the new-construction plan review of $1,008 for the first 4 hours plus $252 an hour
Renewal
One-time per build, or again on a material menu or facility change
Processing
Scheduled after you apply, typically 1 to 3 weeks

King County Temporary Food Establishment Permit (only when you serve the public)

Your annual catering permit covers preparation at the commissary, not serving the public at an event. The moment you sell to the general public at a Seattle festival, fair, or farmers market, that booth needs its own King County temporary permit on top of your catering permit. Most full-service caterers cooking from raw fall under the complex tier, and a caterer doing many public events a season usually comes out ahead buying the $1,008 unlimited package rather than paying per event.

Fee
Per single event by handling level: $126 minimal, $315 moderate, $441 complex. A year-round option for caterers working the event circuit runs $1,008 for an unlimited complex package plus a $126 Certified Booth Operator course (valid 2 years). Late fees run $50 to $100
Renewal
Per event, or per calendar year for the multi-event and unlimited packages
Processing
Apply at least 14 days ahead; late applications take a penalty fee

City level

6 credentials

City of Seattle Business License Tax Certificate

A caterer working out of Seattle must carry the city's Business License Tax Certificate (SMC 5.55) alongside its state UBI, applying and filing through FileLocal and renewing each December. Holding it is not a land-use clearance, so a caterer still has to verify its commissary sits in a zone open to commercial food prep before relying on the address. The narrow exemption, no Seattle premises and under $4,000 of in-city receipts a year, rarely fits a working caterer.

Fee
$73 for a new business at the lowest 2026 tier (half that if you open July 1 or later); renewal scales with prior-year Seattle taxable revenue, plus $10 per extra location. A caterer with no Seattle location grossing $4,000 or less a year in the city is exempt
Renewal
Annual (expires December 31)
Processing
Same day to about a week online through FileLocal, longer by mail

City of Seattle Business and Occupation (B&O) Tax

The city layers a gross-receipts tax of its own under SMC 5.45, collected by the Office of City Finance rather than the state, with catering booked under the retail services classification. The 2026 Seattle Shield reform set the rate at 0.342% but pushed the exemption ceiling up to $2 million in taxable revenue, so a caterer below that line pays no city B&O even while it still files a return each year and has its business license fee gauged on revenue before the standard deduction is applied.

Fee
0.342% of Seattle taxable gross receipts under the retail services classification for 2026 through 2032, with no tax owed under $2 million in taxable revenue and a $2 million standard deduction above it; the return is filed even when no tax is due
Renewal
Quarterly or annual filing through FileLocal
Processing
Self-assessed and filed through FileLocal

SDCI Construction Permit, Change of Occupancy, and Certificate of Occupancy

Only if you build out your own commissary. A change of use to food service needs an SDCI construction or tenant-improvement permit and a Certificate of Occupancy before you cook, with separate electrical, plumbing, and mechanical trade permits. A caterer leasing a space that already holds a food-service Certificate of Occupancy inherits that classification and needs a new permit only for physical changes it makes.

Fee
Valuation-based on the construction work plus hourly review fees, estimated through the SDCI fee tool; a mechanical permit for the kitchen hood and duct adds a fire-review surcharge
Renewal
One-time per project; the Certificate of Occupancy holds until the use changes
Processing
4 to 12 weeks of plan review by complexity, with over-the-counter review for small projects

Seattle Public Utilities Grease Interceptor and Side Sewer Permit

Only if you build out your own commissary. A Seattle kitchen with commercial plumbing and a county food permit must install and maintain a grease interceptor under SMC 21.16.310, a rule that names caterers explicitly. As of October 1, 2025 the side sewer permit to connect it comes from SPU, not SDCI. A caterer leasing a built-out, permitted commissary inherits the existing interceptor and connection and shares the maintenance duty with the kitchen owner.

Fee
No standalone program fee; the interceptor is a contractor cost, plus an SPU side sewer permit (priced by scope) to connect or modify the sewer line
Renewal
One-time install; ongoing maintenance, cleaned before grease passes 25 percent of volume under SMC 21.16.310
Processing
Reviewed with the construction permit through the Seattle Services Portal

Seattle Public Utilities Backflow Prevention Assembly

Only if you build out your own commissary. SPU sets the cross-connection hazard level and requires an approved backflow assembly on the water service, generally a double check valve at minimum and sometimes a reduced pressure assembly for premises isolation, because a commercial kitchen handles cleaning chemicals near food and water. A caterer leasing a permitted commissary inherits the existing protection and has no separate SPU assembly obligation.

Fee
No SPU fee for the requirement; the install needs a plumbing permit and a Washington-certified tester does the annual test at the owner's expense
Renewal
Annual test by a certified tester, with SPU inspection before the assembly goes into service
Processing
Installed with the plumbing work; tested at install and every year after

Seattle Liquor License Local Authority Objection (only if you serve alcohol)

Only if your catering business serves alcohol. Seattle issues no separate alcohol permit; the state Liquor Caterer License is the operative one, but under WAC 314-07-020 the LCB notifies the Seattle Mayor's office, which has 20 days to object or recommend conditions. Seattle rarely objects to a straightforward caterer application, but zoning or public-safety concerns at the kitchen or service locations can draw a request for more information or an extension.

Fee
No separate city fee; the objection step is part of the state LCB license process
Renewal
Applies at the initial application; renewal objections are filed 30 days before the license expires
Processing
A 20-day city objection window inside the LCB process after the LCB notifies the city

Operational level

1 credential

Seattle Fire Operational Permit (commercial kitchen Type I hood)

Only if you build out your own commissary with a grease-producing range, fryer, or similar. A Type I exhaust hood with a listed fire-suppression system is required under the Seattle Fire and Mechanical codes; SDCI permits the hood and duct install and Seattle Fire tests the suppression system before operations and issues an ongoing annual permit. A caterer leasing a fully equipped, already-inspected commissary inherits the hood and suppression system and pulls a new permit only if it adds cooking equipment.

Fee
An annual Seattle Fire operational permit, plus the SDCI mechanical permit for the hood and duct install with a fire-review surcharge; confirm current amounts with the departments
Renewal
Annual operational permit; one-time mechanical permit for the install
Processing
The mechanical permit is reviewed with the construction plans; Seattle Fire inspects and tests the suppression system before the kitchen operates
See how other caterers in Seattle are managing every permit, license, and renewal in one place with CredentiAlert.

Seattle-specific things to watch for

1The county, not the city, issues your food permit. Public Health Seattle and King County licenses every catering kitchen in the city, runs the plan review, and inspects, while the City of Seattle issues only the business license and the building and fire permits. Caterers who send the kitchen permit to the city lose time.
2The catering permit fee is not seat-based. The restaurant schedule is tiered by seat count, but a caterer has its own risk-based line in the King County fee schedule, topping out at $945 a year at Risk 3. A full-service caterer that cooks from raw, hot-holds, and cools almost always lands at Risk 3, the top tier.
3Leasing a licensed commissary collapses most local startup cost. A caterer leasing a kitchen that already holds its own Public Health permit inherits the Certificate of Occupancy, the hood and suppression system, the grease interceptor, the backflow assembly, and the side sewer connection, so year-one local permit spend is roughly $1,500 to $2,500 instead of the $20,000 to $60,000 or more of building your own.
4Every public event needs its own King County temporary permit, even with the annual catering permit. The annual permit covers preparation at the commissary; serving the public at a festival or farmers market needs a separate temporary permit per event. A caterer working the summer circuit usually saves by buying the $1,008 unlimited complex package plus the $126 Certified Booth Operator card rather than $441 per single event.
5Watch for a second, city-level B&O bill. Apart from the state tax, Seattle assesses its own gross-receipts tax on caterers under retail services, filed through FileLocal. The 2026 threshold jump to $2 million means most caterers send the city nothing, yet the filing stays mandatory and the cutoff is measured on taxable revenue before the standard deduction, not on raw gross sales.

How long does it take?

A caterer leasing an already-licensed commissary can be operating in about 3 to 6 weeks, limited mainly by King County scheduling the field plan review and pre-operational inspection, with the Seattle business license issuing within days through FileLocal in parallel. Building out your own commissary is the long pole at 9 to 12 months, driven by the SDCI construction and mechanical permit review (4 to 12 weeks), the build itself with electrical, plumbing, fire-suppression, backflow, and side sewer inspections, the Certificate of Occupancy, and only then the county catering permit and inspection. Serving alcohol runs alongside, with the city's 20-day objection window inside the state LCB process.

Frequently asked questions

How much is a catering kitchen permit in Seattle?

The permit comes from King County, not the City of Seattle, and a full-service caterer at Risk 3 (cooking from raw, hot-holding, and cooling) pays $945 a year on the county permit year of April 1 to March 31. A one-time field plan review adds $504 for the first 2 hours. If you lease an already-licensed commissary, you still hold your own catering permit but skip the building, grease, and hood costs of your own kitchen.

Do I need my own commissary kitchen to cater in Seattle?

King County requires every caterer to work from an approved commissary kitchen, but you do not have to own one. Most caterers lease time in an already-licensed commercial commissary and submit a signed use of commissary agreement with their catering permit application. Leasing avoids the SDCI building permit, the SPU grease interceptor and backflow work, and the Seattle Fire hood install, saving tens of thousands of dollars.

Does Seattle have its own B&O tax on top of the state B&O tax?

Yes. The City of Seattle levies its own Business and Occupation tax under SMC 5.45, separate from the Washington State B&O tax, and a caterer reports under retail services at 0.342 percent of taxable gross receipts for 2026 onward. You file the Seattle return through FileLocal, apart from your state filing. Since 2026 the city no-tax threshold is $2 million in taxable revenue, so most caterers owe no city B&O tax but still file and keep a business license certificate.

Do I need a permit to cater at a Seattle festival if I already have a catering permit?

Yes. Your annual King County catering permit covers preparation at your commissary, not serving the public at an event. A festival, fair, or farmers market needs a separate King County temporary food permit for each event or event season. A full-service caterer cooking from raw usually needs the complex tier, $441 per single event or $1,008 for an unlimited yearly package that requires a Certified Booth Operator.