Arlington, Washington Building Permit Guide

The City of Arlington’s Building Services Division reviews, issues and inspects building, plumbing, mechanical and fire permits inside city limits, with applications and payments made through the City’s iWorQ Citizen Portal. The City does not review or inspect electrical systems: that permit comes from the state Department of Labor and Industries (L&I). Two local facts shape most house projects: plan review is 65% of the permit fee under the fee resolution passed in June 2026, and since November 26, 2025 new one- and two-family homes must have fire sprinklers.

The division works from the Community and Economic Development (CED) office at 18204 59th Avenue NE, reachable at 360-403-3551 or ced@arlingtonwa.gov; the Building Official is Kevin Olander. The Census Bureau put Arlington’s 2025 population at 22,031.

These rules cover the City of Arlington only. Land outside the city limits is permitted by Snohomish County.

What requires a building permit in Arlington?

Arlington’s permit page puts it simply: a permit is required before building or installing equipment in most cases, so check with the Building Division before work starts. The City adopts the state’s residential code as published in chapter 51-51 WAC without changing its exemption list (Arlington Municipal Code (AMC) 16.10.070 only drops the code’s board of appeals section), and the City summarizes the main exemptions on its applications page.

The sprinkler ordinance also reaches existing homes. A sprinkler system is required when an addition takes a house over 3,600 gross sq ft or doubles its floor area, when the house is expanded or altered and its access road is longer than 150 feet, steeper than 10% or not paved, when the nearest hydrant is more than 300 feet away, when three years of permits cost more than the County’s assessed value of the house, for an ADU attached to or inside a house unless the two are separated under IRC section R302.3, and for any home licensed as an adult family home.

What the city decides and what the state holds

The building, residential, mechanical, plumbing and energy codes are adopted by reference as the State Building Code Council publishes them, so Arlington enforces the 2021 editions in force since March 15, 2024. The City’s own levers are its fees, its permit time limits in AMC 16.28.030, its fire code amendments in Title 15 (including the sprinkler ordinance), and its zoning, critical areas and shoreline rules in Title 20.

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

Arlington building department: who handles permitting

CED’s Building Services Division handles review, processing, issuance and inspection of development permits under state and local codes, and the same department processes land use and civil (site engineering) permits. Water and sewer connections and their inspections are Public Works matters. For an early conversation about a project, the City runs General Information Meetings with CED staff.

Permit types

Residential permits

The 2026 residential building application covers single-family homes, duplexes, townhomes, additions and alterations and accessory structures. It starts with proof of an approved zoning verification, then the application, site plan, architectural and structural plans, structural calculations, energy code compliance forms and any special inspection agreement. Mechanical and plumbing plans not in the main set, and fire sprinkler drawings, are deferred submittals with their own application and review. Incomplete applications are not accepted.

Smaller jobs use the residential miscellaneous application (decks, fences, hot tubs and spas, pools and retaining walls) or their own forms for re-roofs, solar, battery storage, demolition and manufactured homes. Manufactured home installation is $500, a moved building $100 and a demolition $100 plus the inspection fee. A residential re-roof is a flat $75; a retaining wall is $100 or the valuation fee, whichever is greater; a fence over 7 feet pays $100 plan review plus inspection.

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

Commercial permits

Commercial buildings, multifamily, mixed use and tenant improvements each have a 2026 application, with separate commercial plumbing and mechanical permits that need line drawings and carry a 65% plan review. Structural masonry and spray-applied fireproofing need a special inspection firm under an agreement filed with the application. Operating permits (hazardous materials, tents, tank removal, special events) are inspected at $150 an hour. The sprinkler ordinance also reaches commercial work: non-habitable structures of 3,000 sq ft or more, A-2 occupancies over 100 people, assembly buildings over 200, and additions taking a building over 3,000 sq ft.

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

Zoning verification comes first for houses and ADUs. Larger projects go through land use review first: a zoning (Type I) permit is $2,300, a Type II special use permit $3,400 plus the hearing examiner fee if one is required, and a Type III conditional use permit $4,000 plus the hearing examiner fee. Where critical areas or shoreline apply, the 2026 resolution prices a critical area letter of exemption or site plan review at $180 each, a shoreline exemption letter at $180, and a shoreline substantial development permit at $550 alongside a land use permit or $1,100 on its own. A flood hazard permit adds $180 to the building permit, and administrative design review for a single-lot house (residential infill, the Old Town Residential District, subdivisions and private subarea plans) is $180. Lots on septic are under the Snohomish Health District; City water and wastewater connections carry their own connection charges.

Arlington permit costs and fees

Building fees are in Section 4 of Resolution No. 2026-007, which replaced Resolution 2026-001 and took effect when the City Council passed it in June 2026. Value comes from the current ICC building valuation data. The plan review fee is due at submittal and the balance at issuance.

The table chains except at $50,000, where the next band restarts at $967.24 rather than the $968.74 the band below reaches. Worked example. Arlington’s table puts a $60,000 addition at $967.24 for the first $50,000 plus $106.10 for the next ten thousands, a permit fee of $1,073.34. Plan review at 65% ($697.67), the $6.50 residential state surcharge and the $25 processing fee bring it to $1,802.51; card payments add 3%, and plumbing, mechanical and the L&I electrical permit are separate.

A new home also pays impact fees: $2,536.16 for parks per single-family home (Ordinance 2025-023), a traffic fee of $3,355 per p.m. peak-hour trip ($5,841.39 in the Cascade Industrial Center and $1,504.70 in the Island Crossing subarea), and a school fee of $544 in the Arlington School District or $0 in the Lakewood School District. Applying to defer impact fees costs $200.

Trade permits and who may pull them

The City’s application is blunt: Arlington does not review or inspect electrical systems, and Arlington is not on L&I’s list of cities with their own electrical program. Electrical permits and inspections, including solar and battery wiring, come from L&I. The City issues the plumbing and mechanical permits, priced per fixture or appliance; residential permits include a base fee and inspection fee, and commercial ones include two inspections.

How to apply for an Arlington building permit

Review, corrections and what causes delay

The City publishes annual permit performance reports on review times. Incomplete applications are not accepted, and the residential form lists what complete means: the approved zoning verification, plans and structural calculations, energy forms, the special inspection agreement where needed, and a deferred submittal request for any plumbing, mechanical or sprinkler design that follows later. Revising plans while review is under way costs $75 or a new plan review fee, depending on how far review has gone, and revised plans after issuance pay a new plan review fee.

Inspections in Arlington

Inspections are booked on the automated line, 360-403-3417, only for issued permits. Calls before 3:30 p.m. go on the next day’s schedule; leave the permit number, address, inspection type and whether you want the morning (8 a.m. to noon) or afternoon (1 to 4:30 p.m.) slot; the City tries to honor a requested time but does not guarantee it, and each inspection in a multiple request needs its own details. Fire alarm and sprinkler inspections need 48 hours’ notice, and water and sewer inspections are booked with Public Works.

Under AMC 16.28.030 a building permit lapses if work does not start within 180 days of issuance or stops for 180 days, and a permit with no approved inspection in its first 180 days counts as expired. One extension of up to 180 days is possible if asked for in writing at least 30 days before expiry; restarting lapsed work within a year costs half the original permit fee.

Arlington permit search and official resources

Applicants follow their permits, payments and status in the iWorQ Citizen Portal. Other permit records are requested through the City’s public records center. Arlington participates in the National Flood Insurance Program, and FEMA lists its current effective map as June 19, 2020.

• Arlington Building & Permits: Building Services Division
• Permit applications and how to apply online
• Development permit applications and checklists
• iWorQ Citizen Portal
• 2026 residential building permit application (PDF)
• Fire sprinkler checklist, Ordinance 2025-020 (PDF)
• Fee Resolution No. 2026-007 (PDF)
• Impact and mitigation fees, December 2025 (PDF)
• Inspection procedures
• Annual permit performance reports
• Arlington Municipal Code Title 16: buildings and construction
• L&I list of cities with their own electrical permits

Arlington building permit FAQ

Who issues building permits in Arlington?

The Building Services Division of Community and Economic Development, 18204 59th Avenue NE (360-403-3551). L&I issues electrical permits.

Does a new house in Arlington need fire sprinklers?

Yes. Since November 26, 2025 (Ordinance 2025-020), new one- and two-family dwellings need a fire sprinkler system; manufactured homes are exempt.

How much is a building permit in Arlington?

A $60,000 project pays $1,073.34 for the permit and $697.67 for plan review, plus the $6.50 state surcharge and $25 processing fee.

Do I need a permit for a fence or deck?

Not for a fence up to 7 feet, or a deck of 200 sq ft or less that is no more than 30 inches above grade, freestanding and not at the exit door.

How do I schedule an inspection?

Call 360-403-3417 before 3:30 p.m. for a next-day inspection and choose a morning or afternoon slot.

How long does a permit last?

It expires if work does not start within 180 days or stops for 180 days; one 180-day extension can be requested 30 days ahead.

Simplify Arlington 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 Arlington permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.