Snohomish, Washington Building Permit Guide

For property inside the city limits of Snohomish, the City’s Permit Center at City Hall issues building, plumbing, mechanical, fire and right-of-way permits and water and sewer connections, and every application goes through the Self-Service Permit Portal. Electrical permits are handled by the state Department of Labor and Industries (L&I). The fee is set by project value, plan check adds 75% and is collected at submittal, and a 5% technology fee applies to most development charges.

City Hall is at 116 Union Avenue. The Permit Center takes walk-ins Monday to Thursday from 8:30 a.m. to 3:30 p.m. and sees people on Fridays by appointment, with virtual counter appointments also offered; the permit line is 360-282-3156. Snohomish’s 2025 Census estimate is 10,719 residents.

A “Snohomish” mailing address does not mean city jurisdiction: the City warns that many such addresses are in unincorporated Snohomish County, which issues their permits. Check the City’s city-limits map or your tax bill first.

What requires a building permit in Snohomish?

The City’s answer is broad: a building permit is needed for any new construction, remodel, repair, demolition, change in use or conversion, and in practice for anything beyond finish work such as carpet or paint. Section 19.04.150 of the Snohomish Municipal Code (SMC) replaces the model codes’ exemption lists with a short local one, so items that are exempt elsewhere, such as low decks, small retaining walls and re-roofing, need permits here.

What the city decides and what the state holds

SMC 19.04.030 (Ordinances 2483 of 2024 and 2526 of 2025) adopts the 2021 International Building, Existing Building, Residential, Mechanical, Fuel Gas, Fire, Wildland-Urban Interface, Property Maintenance and Swimming Pool and Spa codes, the Uniform Plumbing Code and the state energy code, with the State Building Code Council’s amendments and several optional appendices. Snohomish’s own choices are the short exemption list, the one-shed rule, the fees, hearing examiner appeals and a requirement that a lot on septic connect to City sewer once it becomes available. Plans use a 25 psf ground snow load, 110 mph wind, seismic category D or E and an 18-inch frost depth.

Washington has a mandatory statewide building code under chapter 19.27 RCW that every city and county enforces and may make stricter; electrical permits come from the Department of Labor and Industries unless the city runs its own program or Tacoma Power serves the site. Building codes in Washington

Snohomish building department: who handles permitting

Planning and Development Services runs the Permit Center, which links applicants to the Building Official, the Planning Department (360-282-3167), Public Works and Engineering. Fire alarm and sprinkler permits are priced on the City’s valuation table, and the City publishes a separate Fire District #4 fee sheet.

Permit types

Residential permits

A house, ADU, deck or accessory building over 200 sq ft takes a valuation-based building permit, with separate plumbing and mechanical permits priced by fixture and appliance. Each project type has a submittal checklist on the City’s forms page, and a shorter list appears in the portal as you apply. A homeowner may draw the plans for most small residential projects, additions, garages and remodels if they follow the prescriptive rules of the residential code; engineering is needed for houses that do not meet the prescriptive bracing rules, use other than conventional wood framing, or have an unusual shape or difficult site.

Flat fees cover the quick jobs: a residential re-roof is $200, a fence permit $50, solar panels $75, and demolition of a house $100 or a shed or garage $20. Plumbing and mechanical replacement permits, for example a water heater or furnace, can be issued as soon as the application is processed and paid.

Building or remodeling a home here? Alliance handles residential permit expediting, so the crew isn't waiting on the counter.

Commercial permits

Commercial buildings, tenant improvements, signs and fire alarm or sprinkler systems are priced on the same valuation table, and a commercial re-roof is $500. Any building that needs engineering, has more than four dwelling units or exceeds 4,000 sq ft must be designed by a Washington-licensed architect. Design review costs $70 as an administrative review or $150 for a Design Review Board determination when it is not filed with another permit, and new uses in the Pilchuck District can need a provisional use determination ($530).

For tenant improvements and new commercial builds, Alliance handles commercial permit applications through issuance. More on this: commercial building permits explained.

What comes before the building permit

Flood, shoreline and critical areas reviews are the usual early steps. Work in a special flood hazard area needs a $150 flood permit on top of the building permit; shoreline substantial development permits cost $1,065, or $2,465 with SEPA review; and critical areas review not tied to another permit starts at $200 plus a $4,000 deposit. A pre-application conference is $330, and SEPA review ending in a DNS or MDNS is $650.

The City is the water and sewer utility. For a new single-family home its February 2026 sheet lists water connection charges of $5,546 for a drop-in or $8,076 when the service must be installed from the main, sewer charges of $13,560, and an extra $8,288 in the Cemetery Creek trunkline area. A lot still on septic connects to City sewer as a condition of the building permit once City service is available; until then the septic system remains a Snohomish Health District matter.

Snohomish permit costs and fees

Building fees are in Section 8 of the City’s 2026 Master Fee Schedule, Resolution 1478 as amended by Resolution 1494, which the Council adopted on November 18, 2025 with effect from January 1, 2026; Ordinance 2541, passed on September 1, 2026, brought the building, mechanical and plumbing fee tables in SMC 19.04.160 into line with it. Fees are collected when the application is submitted, based on the value of work given by the applicant or calculated from square footage. The schedule has no line for the state building code fee; the City’s FAQ describes fees as including “a plan check fee and a small state surcharge.”

The bands do not all join exactly (the $100,001 band starts at $1,081.89, but the $500,001 band at $4,082.13 rather than the $3,437.89 the band below reaches), so stay inside the band the value falls in. Worked example. Price a $60,000 remodel this way: the first $50,000 costs $718.89, the remaining $10,000 adds $72.60 (10 × $7.26), and the permit fee is $791.49. Plan check (75%) is $593.62 and the 5% technology fee on both is $69.26, so $1,454.37 is due plus the state surcharge.

New houses also pay a traffic impact fee of $5,111 per p.m. peak-hour trip, a park impact fee from $3,310 to $11,470 depending on the home’s size, and the Snohomish School District’s $5,361 ($5,462 for a townhome or duplex). A residential right-of-way bond, for a driveway cut for example, is typically $1,000.

Trade permits and who may pull them

The City sends electrical work to L&I, which does not list Snohomish among cities with their own electrical programs. That matters twice in the inspection sequence: L&I must approve the rough electrical before the City’s framing inspection, and must final the electrical before you call for the City’s final.

How to apply for a Snohomish building permit

Review, corrections and what causes delay

Review time depends on the reviewer’s workload, and the Permit Center gives estimates by project type. An application that expires can be reopened once within 180 days for half the plan check fee. A building permit is valid for 2 years; one 1-year extension is possible if a written request reaches the Building Official no more than 30 days before expiry.

Inspections in Snohomish

Inspections are requested in the portal under My Work, Request Inspections. There are no City inspections on Wednesdays (requests for a Wednesday move to the next business day), weekends or federal holidays, so give a same-day contact in the request. The City’s inspection list runs from footing, foundation, groundwork plumbing and underfloor through shear walls, framing, insulation and drywall nailing to the final. At the footing inspection the property lines must be staked and string-lined so setbacks can be checked, and gas piping is inspected under pressure test before backfill.

A certificate of occupancy is issued only when the building, mechanical and plumbing permits are finaled and Public Works and Planning confirm their conditions are met; the City asks for up to a week after you report the work complete. A re-inspection fee of $100 can be charged when work is not ready, and no further inspections are made until it is paid.

Snohomish permit search and official resources

Anyone can look up permits in the portal: choose Search Public Records and enter an address, street, keyword or work type to see permits issued since 2019 and those still in review. Older files are requested through the City’s public records page. Snohomish participates in the National Flood Insurance Program, and FEMA lists its current effective flood map as June 19, 2020.

• Snohomish Permitting: Permit Center hours and forms
• Permit FAQs
• Self-Service Permit Portal guides
• Self-Service Permit Portal
• Forms and applications (submittal checklists)
• Fee schedules
• 2026 Master Fee Schedule (PDF)
• Single-family development fees, February 2026 (PDF)
• Building code information and design values
• Building inspections
• SMC chapter 19.04: building codes
• Public records requests
• L&I list of cities with their own electrical permits

Snohomish building permit FAQ

Who issues building permits in Snohomish?

The City’s Permit Center at City Hall, 116 Union Avenue (360-282-3156), for property inside city limits. L&I sells the electrical permit and inspects the wiring.

My address says Snohomish. Is the City my permit office?

Not necessarily. Many Snohomish mailing addresses are in unincorporated Snohomish County; if your property taxes go to the County, apply there.

Do I need a permit for a fence in Snohomish?

Not for a residential fence up to 6 feet outside the Historic Business District, the Pilchuck District and the right-of-way. Elsewhere a fence permit is $50.

Do I need a permit for a shed?

One shed or playhouse of up to 200 sq ft per lot is exempt if it is not fixed to a poured concrete foundation. A second one needs a permit.

How much is a building permit in Snohomish?

A $60,000 remodel pays $791.49 for the permit, $593.62 for plan check and $69.26 in technology fees, plus the state surcharge.

Are inspections done on Wednesdays?

No. Wednesday requests are moved to the next business day, and there are no inspections on weekends or federal holidays.

How long is a permit valid?

Two years from issuance, with one 1-year extension if you ask in writing within 30 days before it expires.

Simplify Snohomish permitting with Alliance Permitting

Alliance Permitting is a permit documentation and submission company in Washington. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.

This guide is provided by Alliance Permitting for general information about Snohomish permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.