Jefferson County, Washington Building Permit Guide

Outside Port Townsend, the Jefferson County Department of Community Development (DCD) reviews and issues building permits from 621 Sheridan Street in Port Townsend, alongside development review and the county fire marshal. Permit applications are taken only by appointment, with the plans uploaded beforehand. On the 2026 fee sheet a house is valued at $170.80 a square foot and plan check adds 65 percent of the permit fee.

What requires a building permit in Jefferson County?

Chapter 15.05 of the Jefferson County Code adopts the state building, residential, mechanical, fire, wildland-urban interface, energy and plumbing codes in their current form, so their permit rules and work-exempt lists apply here, with two county additions to the exempt list and some county limits on what those exemptions cover.

DCD also posts a handout on exempt residential accessory structures. A building found to break the farm exemption is treated as an ordinary building under the code.

What the county decides and what the state holds

The technical rules are the state’s 2021 codes. County choices include the farm and minor-work exemptions above, the sprinkler rule in JCC 15.05.047 (new homes of 5,000 sq ft or more, and other new buildings of 10,000 sq ft or more, inside an urban growth area need automatic sprinklers), the seawater intrusion rules for wells, and a flood rule that puts the lowest floor and mechanical equipment of a home at least 1 foot above base flood elevation. Electrical work is permitted by Labor and Industries.

Jefferson County building department: who handles permitting

DCD’s building division reviews and inspects, its development review division checks every application against the Unified Development Code (JCC Title 18) and the comprehensive plan, and the county fire marshal sits in the same department. The building official enforces chapter 15.05.

Port Townsend

Port Townsend is the county’s only city, and it permits its own construction: the city’s Planning and Community Development building team performs plan review and inspections, applications go through the city’s online permitting system, and work in a critical area, shoreline or the historic district may need a city land use permit first. Port Townsend is not on L&I’s list of cities with their own electrical programs, so L&I handles electrical permits in the city as well.

Permit types and what comes first

Residential permits

The Complete Building Application Packet covers new homes and additions; separate fillable applications exist for decks, demolition, revisions and manufactured homes, and the mechanical and same-for-same re-roof permits are filed online. Every new home needs the energy code prescriptive worksheet and glazing schedule, the stormwater worksheets for its project size, and the Determination of Adequate Potable Water. Mechanical and plumbing fees for a new single-family home are included in the building permit fee.

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

Commercial permits

Commercial, industrial and multi-family work is valued at estimated cost or fair market value, with plan check at 65 percent, and the fire marshal reviews sprinklers, alarms and hood systems on a separate fire fee list. Larger buildings in urban growth areas trigger the county sprinkler rule, and some projects also need a conditional use permit, variance or shoreline substantial development permit before the building permit.

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

What comes before the building permit

• Land use consistency: development review must approve the application, and DCD treats a building application as incomplete while related land use fees are unpaid or a code compliance case on the property is open. A pre-application conference costs $711.90 and a legal lot of record determination $165.90.
• Critical areas: a new critical areas ordinance (chapter 18.22, Ordinance 01-0309-26) took effect March 9, 2026; review of a critical area report costs $438.90.
• Shorelines: a shoreline exemption is $302.40 for a house or septic system that meets the standard shoreline buffer, otherwise $984.90; a shoreline substantial development permit is $3,228.75.
• Water: proof of an adequate water supply (a water right, a purveyor’s letter or another accepted form) is required. On islands and within a quarter mile of marine shoreline (the coastal seawater intrusion protection zone), public water must be used where available; otherwise a well needs a lab-certified chloride test with the application and a source-totalizing meter, and high-risk areas add a hydrogeologic evaluation. Marrowstone Island’s aquifer is a designated sole-source aquifer.
• High-risk seawater zones: within 1,000 feet of a groundwater source with a history of chloride above 200 mg/L, a private well used as proof of water needs a hydrogeologic evaluation that also goes to the Department of Ecology, ongoing chloride monitoring and flow reporting, and a recorded covenant if a sample tops 250 mg/L.
• Septic: Public Health must approve water and sewage for the site before DCD issues the permit.
• Floodplain: a floodplain development permit is $302.40.
• Road access: a county road approach permit from Public Works, or a WSDOT permit on a state highway, must be issued first.

Jefferson County building permit fees

DCD’s building fee sheet has been in effect since January 1, 2026. Under JCC 15.05.025 the permit fee is based on the square footage times the ICC construction cost, or the value of the improvement if that is higher; the county’s own per-square-foot values are below, and the dollar fee for each valuation comes from the county building valuation table.

Worked example: a 2,000 sq ft house is valued at 2,000 × $170.80 = $341,600. The valuation table row for $341,001 to $342,000 gives a permit fee of $2,721.00 and a plan check of $1,768.65, before the $6.50 state surcharge, the $28 scanning fee and the 5 percent technology fee. The table PDF still carries a “2015 IRC Valuation Table” footer.

Every row of the table sets plan check at 65 percent of the building fee.

Fees on the 2026 land use schedule are built from base hours at $130 an hour, a $28 scanning fee, a $165 notice fee where public notice is required, and the 5 percent technology fee on top. The most recent fee resolution posted on the fees page, 25-0421-25R of April 21, 2025, applied a 2.2 percent consumer price adjustment and added new base fees, including one for short-term rentals.

Trade permits and who may pull them

DCD issues the mechanical permits (online form) and folds mechanical and plumbing into the building permit for a new house; other jobs pay a base minimum fee. Water heaters need their own permit even when the rest of the job is minor and exempt.

• Electrical: L&I issues electrical permits and inspects throughout the county, Port Townsend included.
• Septic: Public Health’s on-site sewage program reviews and issues septic installation and repair permits under county code chapter 8.15 (revised April 1, 2025), certifies installers, pumpers and monitoring specialists, and reviews building permits for sewage adequacy. Its Sanitarian of the Day answers questions in person or by phone each weekday morning.
• Fire marshal: the fire fee list (effective January 1, 2025) charges 65 percent plan check of valuation, at least $390, for sprinkler or fire alarm work, $390 for a hood and duct suppression system or a hot work permit, and $260 for a short-term rental life safety inspection.
• Wells: the drinking water program reviews water availability for building permits and inspects new and replacement well construction.

Contractor registration and the owner exemptions for wiring and plumbing are L&I matters; the licensing section of our Washington guide explains them.

How to apply for a Jefferson County building permit

Review, corrections and what causes delay

Every application gets a consistency review against the county code and comprehensive plan, so open land use items stall it. Under JCC 15.05.060 an application not pursued is abandoned after 180 days (extensions of up to 90 days each, 180 days in total, or more for good cause). An issued permit is valid for one year, with written extensions of up to a year each for a total of four more years. Short-term rental applications are the one exception to the intake appointment rule.

Inspections

Schedule online or leave a message on the inspection line, 360-379-4455, any time of day, with the owner’s name, site address, permit number, inspection type, preferred day and a daytime phone. Requests must arrive by 3 p.m. the day before; DCD does no same-day inspections, offers a day but not a time, and does not call ahead. No inspections are scheduled on November 11. The daily inspection list is posted online.

An extra inspection or re-inspection costs $130, and septic and electrical work are inspected by Public Health and L&I respectively.

Washington building code and flood maps

Jefferson County enforces the 2021 Washington codes through chapter 15.05 of its code and its flood damage prevention chapter 15.15. FEMA’s Community Status Book lists Jefferson County and Port Townsend as participating in the National Flood Insurance Program, with current flood maps dated June 7, 2019. The online county code includes legislation through July 13, 2026.

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

Jefferson County building permit FAQ

Can I walk in to submit a building permit?

No. DCD takes applications by appointment only, after the documents are uploaded to its file share.

How much is a permit for a 2,000 sq ft house?

Using the $170.80 per sq ft value, the valuation table gives $2,721.00 for the permit and $1,768.65 for plan check, plus the state surcharge, scanning and technology fees.

Do I need a permit for a farm building?

Not if it meets the county’s agricultural exemption: free-standing, 10 feet from other buildings, not open to the public and with plumbing only for watering.

What water proof is needed near the shoreline or on an island?

Public water where available; otherwise a well with a lab-certified chloride test and a flow meter, and more in high-risk areas.

Who issues building permits in Port Townsend?

The City of Port Townsend’s Planning and Community Development department, not the county.

How late can I request an inspection?

By 3 p.m. the day before; there are no same-day inspections.

Permit search and official resources

The Customer Self-Service portal shows the description, history and status of permits in the county’s permitting database, with links to assessor data and scanned images; files finaled before December 6, 2022 are in the DCD Laserfiche portal, and anything else can be asked for through a public records request.

• Jefferson County Department of Community Development
• Building permits: appointments, forms and applications
• Customer Self-Service permit portal
• Inspection scheduling
• DCD fees and payments
• 2026 building permit fees
• Building valuation table
• 2026 land use fees
• Jefferson County Code (Titles 15 and 18)
• Critical areas ordinance update (adopted March 9, 2026)
• Shoreline Master Program periodic review
• Public Health septic systems
• Public Health drinking water and wells
• City of Port Townsend building
• L&I list of cities with their own electrical inspections
• FEMA Community Status Book, Washington

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