Cowlitz County, Washington Building Permit Guide

Outside Castle Rock, Kalama, Kelso, Longview and Woodland, building permits come from Cowlitz County Building & Planning, Room 119 of the county building at 207 N. 4th Avenue in Kelso (360-577-3052). You start with a Planning Clearance, file the building application in the county’s Accela portal and pay 65 percent of the permit fee as plan review when you submit. Fees set by the commissioners took effect on July 1, 2026, and the office works a four-day week, Monday to Thursday.

What requires a building permit in Cowlitz County?

The department’s own answer is that most new construction, remodeling and repair work affecting a building or structure needs a permit, and that specialists from Building, Planning and the Health Department’s Environmental Health Unit will tell you whether your project qualifies for an exemption. Chapter 16.05 of the county code requires every permit under the adopted codes to come from the department, and it keeps the residential code’s list of exempt building work while striking out the electrical items, because wiring is permitted by the state.

What the county decides and what the state holds

Ordinance 24-020, adopted March 5, 2024, rewrote chapter 16.05 around the 2021 codes: the International Building Code with appendices C and E, the International Residential Code with appendices AH, AM and AWU, the Fire, Mechanical, Fuel Gas and Existing Building codes, the Uniform Plumbing Code, the Washington State Energy Code and the 2021 Wildland-Urban Interface Code. The department’s design-criteria page and FAQ still mention the 2018 and 2015 editions; the ordinance is the current text. Local additions include a snow-load table that rises with elevation, from 20 psf at 200 feet or less to 80 psf above 1,900 feet, a 12-inch frost depth, seismic category D1 for houses, 110 mph design wind and flood construction under CCC 16.25. Under the interface code the county exempts one-story sheds and playhouses up to 120 sq ft (200 sq ft beside a one- or two-family home) and fences up to 7 feet from that code’s own permit.

Cowlitz County building department: who handles permitting

The county code makes the Director of Building and Planning the administrator of every adopted code; the director is Traci Jackson. One department houses building plan review and inspection, planning, environmental review and the fire marshal, and the Health Department’s Environmental Health Unit works from the same administration building.

Cities in Cowlitz County

Chapter 16.05 applies only to unincorporated land. Each of the five cities runs its own building permits, and none of them appears on L&I’s list of cities with their own electrical program.

Cowlitz County permit types and what comes first

Residential permits

A house application is the Residential Building Permit packet uploaded to Accela: the Project Information Form, one set of plans on sheets at least 11 by 17 inches, truss placement plans, the state energy code form, structural calculations where needed and a soils report if geologic hazards or steep slopes touch the work area. Foundation walls over 8 feet that retain soil, and site retaining walls over 4 feet or carrying a surcharge, need a Washington engineer. The county takes only original electronic PDFs, drawn to scale; scanned copies, resized sets and photographed site plans are rejected unless pre-approved. The Fire Flow Packet is part of the house packet: a dwelling of up to 3,600 sq ft without sprinklers needs 1,000 gallons per minute, which the packet lets you reduce with credits for a hydrant, a lot over 1 acre with 20-foot setbacks, distance to a staffed station, defensible space or ignition-resistant construction.

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

Commercial permits

Commercial buildings are valued at the greater of the ICC valuation table or fair market value, and shell buildings at no less than 80 percent of that. The fire marshal adds a fire and life safety review at 50 percent of the building permit fee.

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

• Planning Clearance: the county’s review against zoning, critical areas, shoreline and SEPA rules. Every parcel proposed for development must clear it before other permits, and it costs $185 in 2026.
• Staff consultation: free, held online or in the office, and suggested for houses over 3,600 sq ft, lots under 1 acre and sites with environmental constraints.
• Water and sewage: since May 1, 2021 a building with plumbing gets no permit until the Environmental Health Unit has approved the water source and sewage disposal; the unit emails a Request for Utility Review form once your project reaches Building & Planning, and a new septic system needs its own EHU permit.
• Critical areas: wetlands, fish and wildlife habitat, frequently flooded areas, geologic hazards and aquifer recharge areas are mapped in the county’s EPIC tool; work within 50 feet of a landslide hazard, steep slope or erosive soil may need a geotechnical report. The commissioners amended the critical areas chapter, CCC 19.15, by Ordinance 26-059 on September 1, 2026; ask Building & Planning which buffers and reports now apply to your parcel.
• Shorelines: the Shoreline Master Program in effect since April 11, 2022 governs development on shorelines regulated under the Shoreline Management Act; an exemption letter is $371 and a Level I substantial development permit $1,854.
• Floodplains and roads: a floodplain permit is $278; driveway approaches and private roads have their own Public Works and fire apparatus road packets.

Cowlitz County building permit fees

The commissioners adopt the department’s fees every year. The current schedule, Resolution 26-040 of June 30, 2026, took effect on July 1, 2026. Building permit fees come from Table A-1 using the ICC Building Valuation Data published in August 2023; the plan review fee of 65 percent is collected when you submit, and the permit fee and everything else when the permit issues. A Building Fees Estimator spreadsheet on the fees page gives an estimate only and leaves out planning and health fees.

Worked example: a project valued at $300,000 falls in the $100,001 to $500,000 band: $1,659.56 plus 200 × $9.39 gives a permit fee of $3,537.56. Plan review at 65 percent is $2,299.41, paid at submittal. The $46 administration fee, the $6.50 state fee for a house, the $10 technology fee per transaction and the planning and health fees come on top.

Trade permits and who may pull them

Building & Planning issues plumbing and mechanical permits; on a one- or two-family house they can ride on the building permit, with their fees added and no separate plan review, and the permit carries two inspections before the $93 rate applies. Electrical work belongs to L&I throughout the county, cities included: the county FAQ sends you to the Kelso office at 711 Vine Street (360-575-6900), and Kelso, Longview and Woodland each say the same on their own pages.

• Itemized trade fees: under Tables M-1 and P-1 a furnace under 100,000 Btu is $23, an air-source heat pump $22, a water heater $10 and each fixture on a trap $10, but every stand-alone mechanical or plumbing permit carries the $93 minimum plus the $46 administration fee.
• Fire code permits: the county’s fire marshal works inside Building & Planning; a residential propane tank of 25 to 120 gallons is $93 plus $24 review, a sprinkler system is priced on value with 50 percent review, and a commercial hood suppression system is $185.
• Special inspections: where engineered work needs third-party testing, the owner signs the county’s Special Inspection and Testing Agreement before issuance.
• Manufactured homes: the county issues the placement permit, with three inspections included; alterations to the home itself go to L&I.

Contractor registration, trade licenses and the limits on owners doing their own wiring or plumbing are state rules, summarized in the Washington licensing section.

How to apply for a Cowlitz County building permit

Review, corrections and what causes delay

Building, engineering and fire code reviews all have to finish before issuance. Common holdups are a missing EHU water or sewer approval, a fire flow requirement nobody planned for, phone-scanned or resized plans that the county will not accept as to scale, and an application left in draft. Revisions after approval are billed at $93 an hour with a half-hour minimum. Accela takes debit and credit cards only; e-checks are no longer accepted.

Inspections in Cowlitz County

Inspectors work Monday through Thursday. Requests made in Accela or on the request line (360-577-3031) before 5 p.m. Monday to Wednesday are scheduled for the next day; for a Monday inspection, book in Accela before 5 p.m. on Thursday or call the line afterwards. Specific times cannot be promised, and a job that is not ready is rescheduled. Some checks, such as simple correction rechecks, equipment change-outs, underfloor plumbing and window or door replacements, can be done by Zoom video if the inspector agrees.

Each permit needs an approved inspection at least every 180 days or it expires. The Building Official issues the certificate of occupancy once building, fire and septic finals are complete; under county policy 120.28 a building on a new or repaired septic system is not finaled until the Health Department approves the system.

Flood maps and state code

FEMA’s Community Status Book lists Cowlitz County and all five of its cities as participating in the National Flood Insurance Program, each with a current effective map dated December 16, 2015. The commissioners adopted a countywide Flood Hazard Management Plan on January 6, 2026, and flood construction follows CCC 16.25.

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

Cowlitz County building permit FAQ

How much is a permit for a $300,000 house in rural Cowlitz County?

The Table A-1 fee is $3,537.56 and plan review adds $2,299.41, before the $46 administration fee, the $6.50 state fee, the $10 technology fee and planning or health charges.

Is the county office open on Fridays?

No. Building & Planning is open Monday to Thursday, 7 a.m. to 5:30 p.m., and inspections also run Monday to Thursday.

Can I bring a paper application to the counter?

The county takes applications through Accela; paper planning packets are no longer accepted, and plans must be original PDFs.

Who issues electrical permits in Longview or Kelso?

L&I, from its Kelso office at 711 Vine Street. Kelso says it does not sell electrical permits, and Longview’s Community Development page sends electrical questions to L&I.

Do I need anything from the Health Department first?

Yes, if the building has plumbing or bedrooms: Environmental Health must approve the water source and sewage disposal before the permit issues.

What happens if I build without a permit?

The 2026 schedule adds 100 percent of the associated permit fee, so the work costs double, and you still need the permit.

Permit search and official resources

Accela shows the status of active permits to anyone with an account, and the county’s interactive Permits Map plots current permit data. Older building, septic, well, address and plat records are scanned into the Building & Planning Property Records archive; staff research beyond that is billed at $93 an hour.

• Cowlitz County Building & Planning
• Accela Citizen Access portal
• Accela instructions and permit process
• Fees page and building fee estimator
• 2026 adopted Building & Planning fees (effective July 1, 2026)
• Building and planning forms
• Residential building permit packet
• Inspection scheduling
• Virtual inspections
• Planning Clearance and regulations
• Staff consultations
• Critical areas
• Shoreline Master Program
• Environmental Health utility review
• Building & Planning property records
• Commissioners’ public records (resolutions and minutes)
• Cowlitz County Code
• L&I electrical permits and inspections
• FEMA Community Status Book, Washington

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