DuPont, Washington Building Permit Guide

In DuPont, the Building Services Division of Community Development enforces the state and local building codes, reviews plans and issues residential, commercial, fire, sign, right-of-way and public works permits, most of them through the City’s online permit portal. Planning and land use applications are fillable PDFs emailed to the permit technician. The electrical permit is the one piece DuPont leaves to the state Department of Labor and Industries (L&I), whose Tacoma office at 950 Broadway sees visitors by appointment; the City’s own code also requires fire sprinklers in every new house.

City Hall is at 1700 Civic Drive and is open Monday to Thursday from 9 a.m. to 4 p.m., with Fridays by appointment; the main number is 253-964-8121. Ray Shipman is the Building Official (253-912-5216), the permit technician answers 253-912-5217 and PermitTech@dupontwa.gov, and the inspection line is 253-912-5219. The 2025 Census estimate puts DuPont at 9,778 residents.

What requires a building permit in DuPont?

Title 12 of the DuPont Municipal Code (DMC) adopts the state building, residential, mechanical, plumbing and energy codes and “any future editions or amendments”; the codified text still names the 2018 editions, and the City’s Codes in Effect page lists the 2021 codes in force since March 15, 2024. DuPont does not rewrite the codes’ exempt-work lists, but it adds its own sprinkler, valuation and expiration rules, and DMC 12.06.020 says plainly that alterations and remodels need a permit.

What the city decides and what the state holds

The construction codes are the state’s, and the City’s Adopted Codes page notes that the 2024 Washington State Building Code takes over for applications submitted on or after May 3, 2027. DuPont’s own rules cover residential and commercial fire sprinklers (DMC 12.04), how remodels are valued (DMC 12.06.020), when permits expire (DMC 12.06.030) and grading, which still follows chapter 33 of the 1997 Uniform Building Code as amended in DMC 12.07.

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

DuPont building department: who handles permitting

Building Services provides code information, permitting help, plan review, site visits and inspections; the Fire Department reviews sprinkler plans and does fire inspections by appointment (253-666-2760); Public Works handles right-of-way, civil and cross-connection work. Some permits come from other agencies: L&I for electrical, the Department of Ecology for construction and industrial stormwater permits, and the Puget Sound Clean Air Agency for demolition notifications.

Permit types

Residential permits

The portal’s residential permit covers new houses, re-roofs, tear-off and re-roofs, remodels, additions, demolition and repairs; a step-by-step guide on the applications page shows how to apply. Small trade jobs at a house have a flat fee: a mechanical or plumbing permit is $75 for up to three fixtures, and above that it is priced as a whole-house job on valuation. A residential re-roof is $150 per roof for buildings up to six units, and demolishing a house is $60.

Fire sprinkler rules reach most residential projects. DMC 12.04.040 requires an NFPA 13-D sprinkler system in every new one- and two-family home, in any addition to a sprinklered home, in additions of 1,000 sq ft or more to an unsprinklered home, and in the remodeled part of a home when remodels within 12 months exceed 60% of its assessed value. For that 60% test, the remodel is valued at its square footage times one-third of the current new-construction valuation. The sprinkler permit must be issued before the framing inspection, the Fire Chief must approve the plans, and the house cannot be occupied until the system test is approved.

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Commercial permits

The commercial permit type in the portal covers new buildings, re-roofs, remodels, additions, demolition and repairs, with commercial mechanical, plumbing, demolition and re-roof permits priced on value and their plan review at 75%. DMC 12.04.110 requires a full NFPA 13 sprinkler system in new assembly, educational, industrial, institutional, mercantile, storage and office buildings over 1,000 sq ft. Special inspection agencies must be named and approved by the Building Official, and their reports go to the City for the record.

Fire permits for new construction, tenant improvements and NFPA-regulated systems use the same valuation table as building permits, with a fire plan review fee of 75% of the permit fee due when plans are submitted. Under the Fire Department’s part of the schedule, a second or later plan resubmittal or reinspection costs 50% of the original fee, expedited review adds 50%, and fire work done without a permit adds 25% to the fee (100% for a second offense within a year).

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

What comes before the building permit

Land use permits use the City’s fillable forms: a pre-application form, the general land use application, SEPA checklist, conditional use permits, preliminary and final plats and short plats, boundary line adjustments and right-of-way vacations, each emailed to the permit technician with an authorization-to-act-as-agent affidavit where needed. A residential plot plan review costs $50 per lot. Construction sites that need coverage under Ecology’s construction stormwater permit file with Ecology, and smaller jobs use the City’s abbreviated stormwater pollution prevention plan.

Because DuPont’s homes are sprinklered, DMC 12.04.070 relaxes some design rules for new subdivisions: one- and two-family developments need fire flows of at least 500 gallons a minute for two hours (1,500 for multifamily), hydrants may be up to 1,200 feet apart (700 feet in multifamily areas), cul-de-sacs of 1,000 feet or less in non-hillside single-family developments need no hydrant of their own, and only one access is required into a single-family project. Appeals of the sprinkler rules go to a panel of the Fire Chief, the Building Official and a building industry member after a $50 fee.

DuPont permit costs and fees

DuPont’s fee schedule (Exhibit A, updated March 25, 2025) prices building permits on the ICC building valuation data. Each permit fee includes two rounds of plan review and one inspection, with more billed at the hourly staff rate, and every permit carries a $35 technology fee. The schedule lists the state fee as “Building Code Council – Residential (pursuant to RCW 19.27.085)” at $6.50 and “Building Code Council – Commercial” at $25.00.

The building section of the schedule prints no row for $50,001 to $100,000 of value, although the fire permit table, which uses the same figures in the other bands, gives $921.95 for the first $50,000 plus $10.00 per added $1,000; confirm a fee in that band with the permit technician. Worked example. A $40,000 remodel sits in the $25,001 to $50,000 band: $559.45 plus 15 × $14.50 ($217.50) gives a permit fee of $776.95. Plan review at 75% adds $582.71, the technology fee $35 and the state fee $6.50, for $1,401.16.

DMC 12.06.020 sets how a remodel is valued: add the percentages for each element the work touches (foundation 10%, exterior structure 20%, roofing 5%, interior structure 10%, interior finish 20%) and multiply by the per-square-foot valuation for that construction type, and attach a signed contract with a Washington-registered contractor. New homes also pay a school impact fee based on the Steilacoom School District’s capital facilities plan, plus a $100 administrative fee, and the Council added transportation impact fees in February 2026 (Ordinance 26-1167).

Trade permits and who may pull them

Mechanical and plumbing permits are City permits, flat-priced for small residential jobs and valued for larger ones. The applications page lists electrical among the permits managed by other agencies, sending applicants to L&I; DuPont is not on L&I’s list of cities with their own electrical programs and lies outside Tacoma Power’s service area. Fire sprinkler permits go through the Fire Department, and irrigation backflow assemblies through Public Works.

How to apply for a DuPont building permit

Review, corrections and what causes delay

Because only two rounds of review and one inspection are covered by each fee, incomplete plans cost both time and money. Remodel applications need the signed contract with a registered contractor that DMC 12.06.020 lists, and residential projects that trigger the sprinkler rules need the Fire Department’s approval in step with the building review.

Inspections in DuPont

Inspections are available Monday to Thursday. Give the Building Department at least 24 hours’ notice and schedule through your online permit portal; questions go to the inspection line, 253-912-5219. Virtual inspections are offered for most permits, by booking in the portal and uploading photos. All work must be inspected and approved before it is covered. Fire inspections are by appointment on 253-666-2760, and before backfilling any backflow assembly, call the Public Works cross-connection specialist on 253-964-8121, or 253-377-4970 for residential irrigation systems.

Under DMC 12.06.030, a permit expires 180 days after its last approved inspection. Before it lapses, the applicant can ask in writing for up to two 180-day extensions, but the request cannot be for financial reasons. A temporary certificate of occupancy costs $300.

DuPont permit search and official resources

Applicants follow their permits in the online portal; older permit files are available through the City’s public records process. FEMA’s Community Status Book lists DuPont in its section of communities not in the National Flood Insurance Program.

• DuPont Building Services: staff and contacts
• All permit applications and the online portal
• Scheduling inspections
• Adopted codes and the 2027 code change
• Permits required by outside agencies
• City fee schedule, updated March 25, 2025 (PDF)
• DuPont Municipal Code, Title 12
• Ordinance 26-1171, data center moratorium (PDF)
• L&I list of cities with their own electrical permits

DuPont building permit FAQ

Who is DuPont’s Building Official?

Ray Shipman, at 253-912-5216. The permit technician answers 253-912-5217.

Does a new house in DuPont need fire sprinklers?

Yes. DMC 12.04.040 requires an NFPA 13-D system in every new one- and two-family home, and in additions of 1,000 sq ft or more to unsprinklered homes.

How much is a permit for a $40,000 remodel?

$776.95 for the permit, $582.71 for plan review, $35 technology fee and $6.50 state fee.

Which days are inspections?

Monday to Thursday, booked in the portal at least 24 hours ahead.

How long does a permit last?

Until 180 days after the last approved inspection, with up to two 180-day extensions requested in writing.

How much does a re-roof permit cost?

$150 per roof for a residential building with up to six units; larger multifamily and commercial re-roofs are priced on value.

Who issues electrical permits?

L&I. The City lists electrical among the permits managed by other agencies.

Does DuPont take part in the National Flood Insurance Program?

FEMA’s Community Status Book, as posted in October 2026, lists DuPont among the Washington communities that are not in the program.

Can a data center apply for permits?

Not during the six-month moratorium adopted September 8, 2026 for data centers over 1 megawatt or 4,000 sq ft.

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