Washington: contractors register, but no state license tests them. Here's what that means.

Washington CONFIRMS the license⇄disclosure inverse-correlation verdict, in its weak-credential form. WA has no competency license — only an L&I bond-and-insurance registration with no exam — and, matching the pattern, it pairs that thin front-end credential with a real, named seller disclosure: Form 17 asks about the wood stove and fireplace insert by name (RCW 64.06), and the sale even triggers a CO-alarm duty (RCW 19.27.530). Low credentialing, strong disclosure — the inverse-correlation holds. But WA's true story isn't the license axis at all: it's RCW 70A.15, the Clean Air Act, which makes selling a new, unapproved woodstove illegal and hands Ecology plus regional clean-air agencies the power to ban wood burning outright on bad-air nights. That environmental overlay — absent from every eastern launch state — is the page's real hook: in Washington the flue is regulated less as a contractor question than as an air-quality one.

Washington has no license for chimney work — it has registration. Under the Contractor Registration Act, RCW ch. 18.27, anyone who contracts to improve real property for pay must register with the Dept. of Labor & Industries (L&I) as a general or specialty contractor — chimney masonry, relining, rebuild, and sweeping-for-hire all fall inside "contractor." L&I's specialty list (WAC 296-200A-016) even names the trade: the Masonry specialty "also includes chimney cleaning and repair," and a separate Wood/pellet and gas stove specialty "installs wood, pellet, or gas stoves, zero clearance and fire place inserts." Registration attests money, not skill: per RCW 18.27.040 a general contractor files a $30,000 continuous surety bond ($15,000 specialty), carries liability insurance (RCW 18.27.050: $100,000 per person / $200,000 per occurrence for bodily injury and $50,000 property damage), and holds a UBI number — there is no competency exam for general-contractor registration. Public lookup: secure.lni.wa.gov / "Verify a Contractor" (lni.wa.gov). Advertising, bidding, or working as a contractor while unregistered is a gross misdemeanor (RCW 18.27.020; some violations are also infractions under RCW 18.27.200), and an unregistered contractor cannot sue to collect (RCW 18.27.080). NOT YET CONFIRMED Confirm any city add-on registrations — see §5.

The gap here is unusually clean: L&I registration is a bond-and-insurance filing with no test at all for a general contractor, so "registered, bonded, and insured" — the phrase every WA contractor uses — says nothing about whether the person can read a flue. Verifying "licensed and bonded" in WA means confirming an active L&I registration + bond, not a passed exam. Individual certs (NCSG CCP/CCR; CSIA CCS, C-DET) remain the only competence signal.

RCW ch. 64.06 requires the seller to deliver the "Form 17" Seller Disclosure Statement within 5 business days of mutual acceptance (RCW 64.06.020). It is actual-knowledge, disclosure-only, not a warranty — and it names the hearth: the statutory form asks "Are any of the following kinds of wood burning appliances present at the property?" (woodstove, fireplace insert, pellet stove, fireplace) and, if yes, "are all of the (1) woodstoves or (2) fireplace inserts certified by the U.S. Environmental Protection Agency as clean burning appliances…?"; chimneys are a listed structural component for defects, and the form asks whether the property has CO alarms, noting the seller's RCW 19.27.530 duty. (Statutory form numbering: chimneys = 4.F "Are there any defects with the following" under 4. STRUCTURAL; wood burning appliances = 5.C and CO alarms = 5.E under 5. SYSTEMS AND FIXTURES. 2026 amendments leave these items unchanged: 2026 c 194 (ESHB 1500, eff. June 11, 2026) changes the common-interest-community audit-report item; 2026 c 173 (SHB 2239) adds a family-burial-ground question effective Jan 1, 2027.) The buyer gets a statutory 3-business-day right to rescind after delivery (RCW 64.06.030). Crucially, the buyer may expressly waive receipt of the statement (RCW 64.06.010), except that if any answer in the "Environmental" section would be "yes," that section cannot be waived — so the disclosure is real but waivable. No inspection is mandated at transfer; NFPA 211 Level 2 stays a NATIONAL STANDARD.

The Consumer Protection Act, RCW ch. 19.86, gives a private action for actual damages, costs, and attorney's fees, with discretionary treble damages capped at $25,000 (RCW 19.86.090) — a softer multiplier than MA/NJ. Enforced privately and by the AG's Consumer Protection Division. Door-to-door / in-person-solicited installment sales carry a 3-business-day right to cancel under RCW 63.14.154 (Retail Installment Sales Act) — plus the federal FTC cooling-off rule. The door-knock "we noticed your chimney" pitch is the textbook target. Complaints: atg.wa.gov (file online) and L&I for the contractor bond.

L&I's Sept. 8, 2025 release "Don't open your door to fraud: Beware of paving scams…" warns that "similar schemes promote roof replacement, chimney repairs and other home improvement jobs" (https://lni.wa.gov/news-events/article/25-23), and the AG runs Home-Improvement-Scam guidance (atg.wa.gov/home-improvement-scams). No WA-specific chimney-sweep enforcement action confirmed yet — re-run search before publish.

Washington runs a statewide code: the State Building Code (RCW ch. 19.27), with the 2021 IRC adopted as the Washington State Residential Code (WAC 51-51-003), effective March 15, 2024 (latest amendment filing effective March 16, 2024; no 2024-IRC adoption appears in WAC 51-51 as of Sep 2026). Coming change: the State Building Code Council says "The effective date of the 2024 codes will be May 3, 2027"; the 2024 IRC/IBC/IMC/IFC/UPC rule packages were filed May 6, 2026 with final adoption targeted for Oct 16, 2026 (sbcc.wa.gov, Sep 2026) — until then the 2021 IRC governs. Chimneys/fireplaces are IRC Chapter 10 (R1001–R1005) — a NATIONAL STANDARD carried into state law. Relines, rebuilds, crowns, and solid-fuel appliance installs are generally permit work; routine sweeps and like-for-like caps generally are not. Cities/counties administer permits locally; verify the local building department.

This is Washington's differentiator. Under the Washington Clean Air Act, RCW ch. 70A.15, no new woodstove may be sold or advertised for sale to a Washington resident unless approved by Ecology (RCW 70A.15.3540), and solid fuel burning devices offered for sale must meet WA emission limits (4.5 g/hr generally, 2.5 g/hr catalytic woodstoves; RCW 70A.15.3530; definitions at RCW 70A.15.3510). RCW 70A.15.3580 sets first-stage burn bans (only EPA-certified or Oregon DEQ Phase II devices may burn when fine particulates are forecast to exceed 35 µg/m³ within 48 hours) and second-stage bans (no wood burning at all), with an emergency power-outage exception; RCW 70A.15.3600 bans burning garbage/treated wood and lets authorities prohibit uncertified devices in areas failing federal fine-particulate standards. Ecology's rule WAC 173-433-100 adds that "A person must not advertise to sell, offer to sell, sell, bargain, exchange, or give away a solid fuel burning device in Washington unless it has been certified and labeled" under EPA's 40 C.F.R. 60 Subpart AAA, and WAC 173-433-110 caps smoke at "an average of twenty percent opacity for six consecutive minutes in any one-hour period" (except up to 20 minutes per 4 hours when starting a new fire). (No "install" prohibition appears in WAC 173-433-100 — do not claim one.) Enforcement is STATE (Dept. of Ecology) + LOCAL clean-air agencies: the Puget Sound Clean Air Agency (King/Kitsap/Pierce/Snohomish) issues Stage 1/Stage 2 bans (Stage 2 bars all wood burning), Spokane Regional Clean Air Agency covers the east, and Northwest Clean Air Agency the northwest counties. A Tacoma-Pierce County rule adds tighter local limits. NOT YET CONFIRMED Agency-level details in this paragraph — counties, Stage 2 scope, Tacoma-Pierce rule — are UNVERIFIED on the agencies' own pages as of Sep 25, 2026; publish only the RCW 70A.15.3580 stage triggers and generic agency names. This regime touches sweeping/repair indirectly (creosote, replacement-stove sales) — a real content section, unlike the Midwest states.

RCW 19.27.530 requires CO alarms in all residential occupancies (older owner-occupied single-family legally occupied before July 26, 2009 were phased in) — alarms outside each sleeping area, on each level. Existing owner-occupied single-family homes occupied before July 26, 2009 are exempt — but for any such home sold on or after July 26, 2009, the seller must equip it with CO alarms per the state building code before the buyer or anyone else may legally occupy it (RCW 19.27.530(2)(b)); new residential construction was covered by Jan 1, 2011 and all other residential occupancies by Jan 1, 2013 — a genuine point-of-sale duty (stronger than MD/IL, which have none). A permitted chimney or stove job is the natural moment to verify alarms.