Washington State (BRPELS) and the Seattle Corridor: SE Requirements for Significant Structures, Aerospace ITAR Staffing and PE Seal Fees

01The board, RCW 18.43 and the significant structures rule

Engineering in Washington is regulated by the Board of Registration for Professional Engineers and Land Surveyors (BRPELS), supported by the Department of Licensing, under RCW 18.43 and the board's rules in the Washington Administrative Code.

Washington licenses both PEs and Structural Engineers. Most structural work may be sealed by a civil or structural PE. But the structural design of significant structures must be done by a licensed SE. The board's rule defines which structures count. In broad terms the definition covers essential facilities, tall buildings, structures holding large numbers of people and other structures where failure would have severe consequences. The thresholds are specific, so check the board's current definition against your building before you choose an engineer.

To hold a Washington SE licence an engineer generally needs the NCEES 16-hour SE exam and qualifying structural experience. A civil PE from another state who has not passed the 16-hour exam can seal ordinary structures in Washington after obtaining a Washington PE, but not significant structures.

For buyers, the test is simple: before award, ask the structural engineer whether the project is a significant structure under the board's rule, and if so, for the name and licence number of the Washington SE who will seal it.

02Firm certificates of authorization and licensing from out of state

Washington requires a corporation, limited liability company or other business entity that offers engineering to hold a certificate of authorization from the board, with a designated Washington-licensed engineer responsible for the engineering. A sole practitioner offering services in their own name is treated differently; check the board's current rule if your subconsultant works alone.

For engineers licensed elsewhere, Washington licenses by comity, commonly using the NCEES Record. Our benchmark for adding Washington to an engineer's and firm's portfolio is $425 ($225 individual application plus $200 firm filing average). Check the board's current fees and processing times; SE comity applications take longer because exam and experience records are reviewed closely.

Seattle permits go through the Seattle Department of Construction and Inspections (SDCI). Suburban and county jurisdictions in the Puget Sound region run their own departments, and many add local amendments to the state building code. Ask your engineer which jurisdictions they file in regularly and how many comment rounds their fee covers.

A frequent problem in the Seattle market is a California or Oregon firm, licensed in those SE-heavy states, which assumes its credentials carry over. They do not: the firm needs a Washington certificate of authorization, and the engineer of record needs a Washington licence, SE where the significant structures rule applies. Because Oregon and California also sit in our 1.35x group, a West Coast firm usually prices similarly across all three states, so the comparison between bidders is mostly about licensing readiness and schedule.

03Washington seal costs: the arithmetic

We apply the house formulas, then the 1.35x multiplier for high-seismic and SE-level review. Puget Sound sits in a high-seismic region exposed to Cascadia subduction and crustal faults, so lateral design and peer review drive both scope and fee. These are typical 2025-2026 market ranges.

Worked example: a Portland structural firm designs a seven-story mixed-use building in Bellevue with $8.0M of structural work. Base: $8,000,000 x 0.012 = $96,000. Washington multiplier: $96,000 x 1.35 = $129,600. Add $425 for the Washington licence and certificate of authorization: $130,025, about 1.6% of structural value. If the building falls within the significant structures rule, the engineer of record must be a Washington SE; confirm that before the fee is agreed. Model your project in the PE stamp and plan review fee calculator.

04Aerospace staffing in Puget Sound and the ITAR constraint

The Puget Sound aerospace cluster, from Everett and Renton to Auburn and Spokane on the east side, runs on a large base of contract engineers: stress analysts, liaison engineers, tooling designers, manufacturing engineers and certification specialists. Demand swings with production rates and program decisions, so contract labor is used heavily.

Bill rate = base wage x (1 + markup). A stress engineer paid $68 an hour at a 55% markup bills $68 x 1.55 = $105.40 an hour, about $219,232 a year at 2,080 hours. A 20% conversion fee on the $141,440 annualized base is $28,288; ask for a step-down to zero by 520 billed hours.

Export controls change the comparison. Work involving ITAR-controlled technical data under 22 CFR 120-130 is generally limited to US persons unless an export authorization is in place, and many commercial aerospace programs carry EAR controls too. In practice:

• Most offshore CAD bureaus are ruled out for controlled data, so the low offshore rates on our other pages do not apply.
• Agencies should confirm US-person status before placement, and the MSA should say so.
• CAD and PLM tools must run in an environment that keeps controlled data where it is allowed to be; check before adopting cloud CAD or AI copilots.

See our aerospace export-control playbook for the full checklist, and compare models in the staffing vs outsourcing TCO calculator.

05Washington taxes: no state R&D credit, so the federal claim matters more

Washington has no personal or corporate income tax. Businesses pay the gross-receipts business and occupation (B&O) tax instead. Washington's former high-technology B&O credit for research expired years ago, and there is no general state R&D credit today. Check the Department of Revenue for any program that applies to your industry, but plan on $0 from the state.

That puts the whole value on the federal IRC section 41 credit and the Section 174A treatment of domestic research. Worked example for an Everett aerospace supplier: W-2 research wages $1,800,000, supplies $200,000, US contractors $400,000. QRE = $1,800,000 + $200,000 + ($400,000 x 0.65) = $2,260,000. Federal credit at about 7.9% = $178,540. Washington credit: $0.

Fee check: a 25% contingency fee takes $44,635. A fixed-fee study with 8 business components costs $8,500 + (8 x $1,200) = $18,100, saving $26,535.

Two aerospace-specific issues decide whether the claim holds:

• Build-to-print work. Making parts to a customer's complete design is generally not qualified research. Design-and-build work where the supplier resolves technical uncertainty is the stronger claim.
• Funded research. Under IRC section 41(d)(4)(H), work paid on a time-and-materials basis where the customer bears the risk is commonly disallowed. Sort contracts by type before the study.

Model it in the R&D credit and Section 174 calculator.

06Washington buyer checklist

• Test each building against the board's significant structures definition before choosing a structural engineer.
• Verify PE and SE licences on the Department of Licensing lookup.
• Require a Washington certificate of authorization for any firm offering engineering.
• Do not assume California or Oregon credentials carry over; check Washington licensure for each engineer of record.
• Ask how many SDCI or local comment rounds the structural fee covers.
• For aerospace staffing, require US-person confirmation in the MSA where data is controlled.
• Cap markups and set a 520-hour conversion step-down.
• Plan on no state R&D credit; screen out build-to-print and funded work from the federal claim.

07Run the numbers: multi-state PE stamp, plan review and NCEES comity fee calculator

The same benchmarks as this sheet, with your inputs. Share link and printable brief open the full calculator page.