Water and Sewer Connection Permit in Seattle, Washington (2026)
Without a Water and Sewer Connection Permit from Seattle's Department of Construction and Inspections (DOCI), you cannot legally connect your restaurant to municipal water and sewer lines — leaving you unable to operate or pass health inspections. The Water and Sewer Connection Permit (also called a utility connection authorization or water/sewer service permit) authorizes the physical tap into city infrastructure and ensures your plumbing meets Seattle's code standards.
- 31 fields — ApronPrep auto-fills 26
- $0–$0 government filing fees (contact Seattle DOCI for connection and inspection fees, which vary by connection type and distance to main infrastructure)
- 4–8 weeks processing time from complete application to permit issuance
Most applicants complete this application in under 15 minutes with ApronPrep, which auto-fills 26 of 31 fields from your restaurant profile.
Analyzed from Water and Sewer Connection Permit
84% from one compliance interview
Manual entry or document upload required
Why You Need a Water and Sewer Connection Permit
A Water and Sewer Connection Permit is required in Seattle because your restaurant's plumbing and waste discharge must comply with city public health and infrastructure codes. The legal basis comes from Seattle Municipal Code §21.16.080 for water connections, §21.36.040 governing sewer extensions and connections, and the Seattle Grease Discharge Control Program rules. This permit is issued by the Seattle Department of Construction and Inspections (SDCI) in coordination with Seattle Public Utilities (SPU). It ensures your connection design meets standards for water pressure, sewer capacity, and grease interceptor requirements, protecting the city's water system from contamination and overload.
Operating without this approved connection exposes you to significant legal and operational risks. Based on code enforcement data, common penalties include:
- Fines: Civil penalties for unauthorized connections or discharges can be assessed daily until corrected. Fines escalate for repeat violations.
- Service Disconnection: Seattle Public Utilities can legally disconnect water or sewer service to your property for code violations, forcing an immediate closure.
- Required Remediation: You may be ordered to halt construction, excavate and redo non-compliant work, or install costly additional pretreatment equipment at your own expense.
- Insurance & Lease Issues: Property damage from an unpermitted connection (e.g., backups, leaks) may not be covered by insurance. Most commercial leases require all utilities to be legally permitted, so non-compliance can trigger a default.
Legal code: Local sewer use regulations, water connection requirements, road/sidewalk ordinances, grease discharge limits
Recent update: As of 2026, Seattle has integrated its permit review process for new commercial water/sewer connections more closely with the SDCI portal, requiring all site plans to be uploaded digitally in specified formats.
Who Needs a Water and Sewer Connection Permit?
| Type | Required | Notes |
|---|---|---|
| Restaurant (Full-Service) | Required | Required for any new permanent food establishment connecting to the municipal water and sewer system, per Seattle Public Utilities (SPU) Code § 21.16.040. |
| Bar / Nightclub | Required | Required for new construction or a change of use that adds plumbing fixtures (restrooms, sinks, bar wells) requiring connection to city mains. |
| Food Truck | Not Required | Typically exempt, as food trucks use temporary water sources (hose bibs from an approved commissary) and holding tanks for waste, not permanent connections; a different 'Mobile Food Unit' permit applies from Seattle & King County Public Health. |
| Coffee Shop / Café | Required | Required for any new build-out that includes plumbing for espresso machines, dish sinks, and customer restrooms, as it constitutes a new service connection. |
See which restaurant types need this requirement — and which don't.
See Full Requirements →Field-by-Field Guide (31 Fields)
26 of 31 auto-filledRestaurant Property Address
textEnter the complete street address of your restaurant, including building number, street name, and any suite or unit number, exactly as it appears on your lease or property deed.
COMMON MISTAKE: Omitting the unit/suite number or using a P.O. Box instead of the physical address.
Legal Property Description
textEnter the formal legal description from your property deed or title report, typically formatted as a lot, block, and subdivision name (e.g., 'Lot 7, Block 2, Pioneer Square Addition').
COMMON MISTAKE: Leaving this blank, using the street address again, or entering an incomplete description missing the lot/block.
Property Ownership Status
textState whether you 'Own' or 'Lease' the property; if leasing, Seattle Public Utilities (SPU) typically requires the property owner to also be listed as an applicant.
COMMON MISTAKE: Selecting 'Lease' without involving the property owner, which will stall the permit.
Connection Type
textSpecify if this is a 'New Connection,' 'Modification,' or 'Repair' to existing water/sewer lines, as defined by Seattle Public Utilities (SPU).
COMMON MISTAKE: Selecting 'New' for a remodel where an existing connection will be modified, requiring a different fee and inspection path.
Existing Connections Present
checkboxCheck this box if there are any active or abandoned water or sewer service lines already connected to the property from the public main.
COMMON MISTAKE: Failing to check this box when connections exist, which can lead to incorrect fees and a failed site inspection.
Building Plans Available
checkboxCheck this box if you have scaled building plans or a site survey showing the property lines, building footprint, and location of all existing utilities.
COMMON MISTAKE: Checking 'Yes' without having the actual plans ready to submit, which will delay review.
Building Plans or Site Survey
textIf plans are available, enter the document name/number (e.g., 'Site Plan A101') and the professional seal number of the engineer or architect who prepared them.
COMMON MISTAKE: Entering vague descriptions like 'blueprints' instead of the specific plan sheet number required by SPU for reference.
Water Inlet Connection Location
textDescribe the precise point where the new water service line will tap into the public water main, using measurements from two permanent property features (e.g., '15 ft north of SE corner of building, 8 ft east of sidewalk').
COMMON MISTAKE: Using vague terms like 'front of building' or providing measurements from temporary objects, which inspectors cannot verify.
Sewer Outlet Connection Location
textDescribe the precise point where the new sewer lateral will connect to the public sewer main, using measurements from two permanent property features (e.g., '10 ft south of NW property corner, 5 ft west of alley centerline').
COMMON MISTAKE: Confusing the sewer outlet location with the interior plumbing stack location or providing insufficient measurement references.
Stormwater Drain Required
checkboxCheck this box if your project involves new impervious surfaces (like patios or expanded parking) that require a dedicated stormwater connection, as mandated by Seattle Municipal Code 22.805.
COMMON MISTAKE: Failing to check this for exterior dining patios or dumpster pads, which triggers a separate, mandatory review and potential fines.
ApronPrep auto-fills 26 of 31 fields from a single compliance interview — no re-typing, no guessing what the government expects.
Top 5 Water and Sewer Connection Permit Mistakes
1. Submitting Incomplete Site Plans
Submitting plans that lack the specific layers or details required by Seattle Public Utilities (SPU) triggers an immediate 'incomplete application' hold. Most often, plans are missing the water and sewer lateral stubs, the location of the water meter box, or the required clearance from other utilities. This mistake adds 1-2 weeks to your timeline as you must re-coordinate with your civil engineer and resubmit. Ensure your civil or site plans explicitly include the SPU Standard Details for water and sewer connections.
2. Misidentifying the Property's Legal Water Source
Incorrectly stating whether your property's water connection is to a public main, private main, or involves a shared service line leads to application rejection. For example, a restaurant in a complex on a private main may need a different application and face additional easement requirements. Selecting the wrong option on the form means SPU cannot assess the correct fees, capacity, or inspection path, causing a 2-3 week delay. Verify your property's legal water source on your SPU account or title report before starting the application.
3. Incorrect Fee Calculation
The permit fee is not flat; it's based on meter size, connection type, and plan review type. Applicants often pay the base fee but miss the required charges for plan review, meter setting, or inspection deposits. Underpayment halts processing until the balance is paid. For a standard 1-inch meter for a new commercial connection, the total government filing fees typically range from $2,500–$4,000. Always use the SPU fee calculator or consult the current fee schedule before submitting payment.
Skip the Paperwork on Your Water and Sewer Connection Permit
ApronPrep auto-fills 26 of 31 fields from one compliance interview.
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Water and Sewer Connection Permit by City in Washington
| City | Fee Range | Timeline |
|---|---|---|
| Seattle | Contact authority for current fees - fees vary based on connection type, distance to main infrastructure, and permit complexity | 4-8 weeks from complete application submission to permit issuance; additional time required for actual connection work and final inspection |
| Spokane | Contact authority for current fees; full payment including general facilities charges is due at time of permit issuance | Application processing time varies; expect technical review phase after submission. Complete timeline not specified in source materials; recommend contacting office for estimated review period. |
| Tacoma | Contact authority for current fees; typical permits range $150-$500 depending on complexity | 4-8 weeks from application submission to final approval (may extend if revisions needed) |
Government Filing Fees
Contact authority for current fees - fees vary based on connection type, distance to main infrastructure, and permit complexity
Timeline: Varies
Step 1: Determine if your restaurant location requires a new water and sewer connection or if existing connections need modification
Review your site plan and tenant improvement drawings to identify whether you need a new connection, an upsized line, or modifications to existing infrastructure. Contact Seattle Public Utilities (SPU) customer service at 206-684-5900 to confirm your property's current connection status — this typically takes 1-2 phone calls and prevents costly re-work later.
Step 2: Contact Seattle Public Utilities to discuss your specific connection needs and obtain required forms
Call SPU's Development Services division or visit their office at 700 5th Avenue, Suite 4900, Seattle to request the Side Sewer Permit application and any jurisdiction-specific fact sheets for restaurants with grease traps. SPU staff will clarify whether you need a standard water/sewer connection permit or a specialized side sewer permit based on your property location.
Step 3: Complete the Side Sewer Permit application form with property details, connection specifications, and grease trap/interceptor information
Fill out SPU's Side Sewer Permit application (approximately 8-12 fields) including property address, building use code, proposed connection diameter, grease trap capacity, and interceptor specifications. Have your site plan and engineer's connection design ready — restaurants must declare all grease-generating fixtures and trap capacity to comply with Seattle's sewer use code (Seattle Municipal Code § 21.16.360).
Where to Apply
Applications are handled by your local department of public works (dpw) in each city. Select your city below for authority details, fees, and processing timeline.
Other Requirements You'll Need
This is one of 13 requirements for opening a restaurant in Washington.
ADA Compliance Self-Certification
federal
Alarm System Permit/Registration
local
Annual Report Filing
state
Application for Employer Identification Number
federal
See all co-required forms and how they connect to your compliance dossier.
See All RequirementsProcessing timelines vary depending on whether your application is complete and whether your project requires additional review by Seattle Public Utilities (SPU). Per the SPU website, initial review typically takes 2–4 weeks for standard residential or commercial connections, but projects requiring environmental assessment, utility coordination, or street cuts may extend to 6–8 weeks or longer. Contact Seattle Public Utilities directly at (206) 684-5830 to confirm the current timeline for your specific project scope.
Seattle does not charge a separate government filing fee for water and sewer connection permits—however, you will incur costs for the actual connection work performed by licensed contractors, utility service charges, and any required inspections or plan reviews. The Building Permit process may also apply if your project involves excavation or structural modifications. For a detailed cost estimate including contractor labor and material, contact Seattle Public Utilities at (206) 684-5830 or visit their website for the current rate schedule. Not legal advice—verify all costs with SPU before beginning work.
No—water and sewer connection permits are location-specific and tied to the property address where the connection will be made. If you are relocating your restaurant or food service operation, you must submit a new water and sewer connection application for the new address. This requirement is tied to your Certificate of Occupancy, which is also property-specific. Contact Seattle Public Utilities to begin the application process for your new location.
Water and sewer connection permits do not expire or require renewal once the connection is established and approved—they remain valid as long as the connection remains in active use at that property. However, if you make significant modifications to the connection (e.g., increased capacity, line relocation, or service type change), you may need to submit a modification request or new permit application. Contact Seattle Public Utilities to determine if changes to your existing connection require new permitting.
Seattle Public Utilities conducts on-site inspections to verify that water and sewer lines meet code standards, including proper slope, depth, materials, and connection points to the municipal system. Inspectors also confirm that backflow prevention devices (if required) are installed and certified—see Backflow Prevention Device Certification for details. Per SPU procedures, you must schedule inspections in advance and have the work area accessible; failed inspections typically require correction and re-inspection, which may add 1–2 weeks to your timeline. Contact SPU at (206) 684-5830 to schedule your inspection and confirm all pre-inspection requirements.
About This Data
This guide is generated from ApronPrep's compliance dossier system, which uses 53 parallel AI authority experts to discover requirements, then downloads actual forms and generates field-level intelligence for each one.
For Washington specifically, we have analyzed compliance dossiers for 3 cities (Seattle, Spokane, Tacoma), generating Rich FILs (Form Intelligence Layers) with 31 form fields analyzed for this requirement. Fee data is sourced from actual county department fee schedules, not estimates.
Our data is verified against official government sources and updated when regulatory changes are detected. If you find an error, please report it — accuracy is our core commitment.
Sources
- Local sewer use regulations, water connection requirements, road/sidewalk ordinances, grease discharge limits
- Seattle — Department of Public Works (DPW)
- Spokane — Department of Public Works (DPW)
- Tacoma — Department of Public Works (DPW)
This Form Is One of 60+ Requirements.
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