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

Correlation verdict: Alaska BREAKS the license⇄disclosure inverse correlation — it is protective on both axes. Its licensing side is mid-to-strong: registration-not-license, but with real bonds, a suit-bar for the unregistered, and the country's only statutory cold-climate construction exam (the endorsement); its disclosure side is flat-out strong — a mandatory state form that names chimneys, fireplaces, wood stoves, and pellet stoves as line items and uniquely asks when the chimney was last cleaned and by whom. The inverse rule predicts a state that credentials contractors this seriously should go soft at the sale table; Alaska doesn't (the one asterisk: the AS 34.70.110 written-waiver escape, which Nevada's both-strong regime forbids — Alaska is a break, but a slightly softer one than NV). That drops the West to 4 confirms / 5 breaks — the inverse correlation has now failed as a predictor in the West, cementing the master finding that it is a regional (Eastern) pattern, not a national law. On the West's orthogonal axis, Alaska is the proof that the axis is really environmental exposure, not wildfire per se: here it manifests as wood smoke, and Fairbanks hosts the strongest wood-smoke regulatory regime in the country — state-run device registration, outright coal/hydronic bans, Stage-2 burn bans with 3-hour extinguish orders at −40°F, and, uniquely in America, a rule that makes the home sale itself the enforcement trigger: non-compliant stoves must be physically removed before closing. The page's headline pairing writes itself: in most of Alaska there is no building code at all — and in Fairbanks, selling your house can legally require removing your wood stove. Message: check the CBPL registration and bond class (an unregistered contractor can't even sue you), read the disclosure form's chimney answers — Alaska's actually says something — never sign a waiver of it, and in Fairbanks treat every stove decision as a DEC-regulated event; everywhere else, NFPA 211 and your own Level 2 inspection are the only code you'll get.

Alaska has no competency-tested contractor license in the usual sense — it has state contractor REGISTRATION, plus one genuine oddity: a Residential Contractor Endorsement earned by passing an arctic-construction exam. STATE LAW: contractors register with the Dept. of Commerce, Community & Economic Development, Div. of Corporations, Business and Professional Licensing (CBPL) under AS 08.18 (Construction Contractors and Home Inspectors) (program page: commerce.alaska.gov/web/cbpl/ProfessionalLicensing/ConstructionContractors.aspx, checked Jul 10, 2026). Categories: General Contractor, Specialty Contractor (≤3 trades from an approved list), Mechanical, and Handyman (contractors whose projects are under $10,000 aggregate). The base registration attests bond + insurance, no exam: AS 08.18.071 sets bonds at $25,000 general / $20,000 general-with-residential-endorsement doing exclusively residential / $10,000 mechanical, specialty, or home inspector / $5,000 for a contractor whose projects are under $10,000 aggregate (2025 AS text, law.justia.com/codes/alaska/title-8/chapter-18/article-2/section-08-18-071/, checked Sep 15, 2026). AS 08.18.101 requires public liability and property-damage insurance of at least $20,000 property damage / $50,000 injury or death to one person / $100,000 injury or death to more than one person, plus workers' comp under AS 23.30; the liability requirement does not apply to a contractor whose projects are $2,500 or less aggregate (2025 AS text, …/article-2/section-08-18-101/, checked Sep 15, 2026). The oddity — the Residential Contractor Endorsement (AS 08.18.025): anyone building a 1–4 unit home or altering one by more than 25% of the structure's value must hold (or employ the holder of) an endorsement earned by (1) passing an exam that "may test competence in relation to arctic structural and thermal construction techniques" and (2) completing, within the prior two years, "the Alaska craftsman home program … or a postsecondary course in arctic engineering" — a cold-climate building-science course named in the statute itself (AS 08.18.025(b), justia.com/codes/alaska/title-8/chapter-18/article-1/section-08-18-025, checked Jul 10, 2026; CBPL confirms the 16-hour course; ACHP still teaches it — achpalaska.com, REF). No small-job exemption in the current exemptions section: the 2025 text of AS 08.18.161 lists twelve exemptions (government, court officers, utilities, oil & gas, finished-product sales, personal property, materials-only suppliers, owners hiring a registered contractor, owners working on their own property, commercial owners/tenants using employees, owner-builders, farm work) and none is a dollar-threshold exemption; small operators instead register in the Handyman category with a $5,000 bond (AS 08.18.071) (law.justia.com/codes/alaska/title-8/chapter-18/article-4/section-08-18-161/, checked Sep 15, 2026). So a chimney company doing even small jobs needs registration. Unregistered contractors are barred from suing: AS 08.18.151 — a contractor "may not bring an action … for the collection of compensation … without alleging and proving" registration at the time of contracting (justia, checked Jul 10, 2026). Penalties: a court may impose a civil penalty of not more than $1,000 for each violation, each day a separate violation (AS 08.18.131, "Injunction; civil penalty"); a person who knowingly contracts without registration (AS 08.18.011) or without a required residential endorsement (AS 08.18.025) with a prior conviction or fine commits a class B misdemeanor, and other violations of the chapter are a violation punishable under AS 12 (AS 08.18.141(a)–(b)); criminal prosecution doesn't bar civil/administrative remedies (.141(c)); CBPL also has citation and administrative-fine powers (AS 08.18.117–.125) (2025 AS text, law.justia.com/codes/alaska/title-8/chapter-18/article-3/, checked Sep 15, 2026). Public lookup: commerce.alaska.gov/cbp/main (CBPL License Search; also ProfessionalLicense.Alaska.Gov). Chimney mapping: a masonry rebuild/reline on an existing home is General or Specialty registration work (confirm masonry appears on the specialty trades list PDF before publish); the residential endorsement is triggered only by new 1–4 unit construction or >25%-of-value alterations — most chimney repairs won't reach it.

Split the gap in two. The base registration tests nothing — it is bond-and-insurance paperwork; a registered General or Specialty contractor has proven zero trade competence to anyone. The endorsement is the one place Alaska actually tests building science — arctic thermal technique, the physics of heat, moisture, and venting in extreme cold, which is closer to chimney-relevant knowledge than any other state credential in the launch set — but it (a) attaches to new-home construction, not repair work, (b) contains no flue-inspection or NFPA 211 content, and (c) most chimney jobs never trigger it. Nobody in Alaska is ever examined on reading your chimney. Individual certs (NCSG CCP/CCR; CSIA CCS, C-DET) plus an independent Level 2 inspection remain the competence signal — NATIONAL STANDARD, not law.

STATE LAW: AS 34.70.010 requires the seller to deliver a completed disclosure before the buyer makes a written offer, on the state-published form: Form 08-4229, "State of Alaska Residential Real Property Transfer Disclosure Statement" (commerce.alaska.gov/web/portals/5/pub/rec4229.pdf, rev. 05/2024, checked Jul 10, 2026). The form is saturated with hearth items: the Structural Components grid lists "Chimneys," "Fireplaces(s) # of," "Woodstove(s) # of," "Stove, Pellet," and "Gas Starter" each with repaired/needs-repair checkboxes; the Property Feature Defects grid lists "Wood Stove(s)" and "CO Detector(s)"; the utilities table has a wood-cost line; and — unique among the states researched — a dedicated "Fireplace and/or Woodstove" section (re-read on Rev. 05/2024, Sep 15, 2026) asks the fuel type, the "Date Chimney(s) Last Cleaned or Serviced," and "Cleaned or Serviced By." Alaska's statutory form literally asks the seller to name their chimney sweep. Mechanics: late delivery gives the buyer a 3-day (in person) / 6-day (mailed) termination right (AS 34.70.020); good-faith, known-defects standard, no records search or inspection required (AS 34.70.060/.040(b)); first sale of never-occupied homes exempt (AS 34.70.120). Liability: actual damages for a negligent violation (AS 34.70.090(b)), up to three times actual damages for a wilful violation (AS 34.70.090(c)), plus costs and attorney's fees to the extent court rules allow (AS 34.70.090(d)) (2025 AS text, law.justia.com/codes/alaska/title-34/chapter-70/section-34-70-090/, checked Sep 15, 2026). The soft spot: AS 34.70.110 lets seller and buyer waive the disclosure entirely by written agreement — the exact waiver Nevada forbids. No inspection is mandated at transfer — NFPA 211 Level 2 remains a NATIONAL STANDARD — but note two Alaska twists: home inspectors are themselves registered under the same AS 08.18 chapter, and in the Fairbanks nonattainment area a sale triggers a genuine legal obligation on the wood stove itself (§7). LOCAL leverage without parallel elsewhere.

STATE LAW: the Alaska Unfair Trade Practices and Consumer Protection Act (AS 45.50.471 et seq.) — private action under AS 45.50.531 recovers, for each unlawful act, "three times the actual damages or $500, whichever is greater" — treble is the default remedy, not an aggravation bonus (justia.com/codes/alaska/title-45/chapter-50/article-3/section-45-50-531, checked Jul 10, 2026), plus the court notifies the AG of every private UTPCPA suit. Complaints: AG Consumer Protection Unit, law.alaska.gov/department/civil/consumer/cpindex.html (complaint form at …/cp_complaint.html; standing Home Improvement topic page at …/home_improvement.html; Mar 8, 2022 AG press release on home-improvement contracts — all checked Jul 10, 2026). Right to cancel — better than the national rule: AS 45.02.350 gives a buyer five business days to revoke a door-to-door contract of $10 or more, seller must give written notice of the right, seller bears return costs, and "personally solicits" includes telephone solicitation (justia, checked Jul 10, 2026); the FTC Cooling-Off Rule's 3 days (16 CFR 429) is the NATIONAL floor beneath it. AS 08.18.151 means an unregistered chimney contractor cannot sue you for payment (§1). Absence finding: Alaska has no recovery/guaranty fund — the AS 08.18.071 bond ($25k/$20k/$10k/$5k) is the only pot of money behind a registration, so "check the bond category before hiring" is the practical advice. Hiring an unregistered contractor does not void your own remedies — NOT CONFIRMED otherwise; no such forfeiture provision surfaced.

No Alaska chimney-sweep-specific AG enforcement action or alert surfaced — say so plainly and re-run before publish. The AG maintains a standing Home Improvement consumer-protection topic page and issued a Mar 8, 2022 press release warning about door-to-door solicitation, full-payment-up-front, and "leftover materials from a job down the street" pitches (law.alaska.gov, checked Jul 10, 2026) — the classic chimney-scam entry script. Alaska's counter-stack is unusually sharp: the door-knock pitch triggers the 5-business-day AS 45.02.350 cancel, the deception triggers automatic treble damages under AS 45.50.531, and if the outfit is unregistered it cannot sue you (AS 08.18.151) and CBPL Investigations takes the complaint. The predictable local pattern (editorial, not accusation): freeze-urgency pressure — "your family will have no heat/CO will back up tonight at −40" — lands harder in Fairbanks than anywhere in the country, and the FNSB removal rule (§7) creates a new scam surface around stove-compliance claims at sale.

STATE LAW/LOCAL: Alaska has no statewide residential building code for ordinary private homes. The State Fire Marshal (Dept. of Public Safety) adopts the I-Codes with Alaska amendments in 13 AAC 50–55 (DPS compilation "effective 10-28-2022," dps.alaska.gov, checked Jul 10, 2026), but that regime governs commercial and larger buildings, and enforcement is handed to "deferred jurisdictions" — Anchorage, Fairbanks (city), Juneau and a handful of others run their own building departments and local code adoptions (confirm each city's current IRC edition before publish; secondary sources put state-level adoptions at the 2018/2021 I-Code cycle — REF). Outside those islands — including most of the Fairbanks North Star Borough outside city limits and essentially all of rural/bush Alaska — there is no residential building code enforcement and no permit office at all (REF; widely reported, e.g. AWC state adoption page). The de facto statewide code is financial: the AHFC Building Energy Efficiency Standard (BEES) — currently the 2018 IECC + ASHRAE 62.2-2016 with Alaska amendments, minimum 5-Star energy rating — binds any home bought or built with Alaska Housing Finance Corporation or other state-assisted financing (construction on/after Jan 1, 1992; ahfc.us/pros/energy/bees, checked Jul 10, 2026); the disclosure form's PUR-101/PUR-102 checkboxes (§3) are BEES paperwork. Practical read: in Anchorage/Juneau/Fairbanks-city, relines, rebuilds, and solid-fuel installs are ordinary permit work; in the unregulated rest of the state the only install gatekeepers are NFPA 211/manufacturer listings (NATIONAL STANDARD) — and, inside the FNSB nonattainment area, DEC's device-emission rules (§7), which function as a state permit-substitute on every stove install.

Fairbanks is the national extreme. The Fairbanks North Star Borough PM2.5 Nonattainment Area (Fairbanks + North Pole, designated Dec 2009; EPA reclassified it "serious" effective June 9, 2017) has, in winter inversions, some of the worst PM2.5 in the US, driven by wood and coal heat. After FNSB voters passed a 2018 initiative (Prop 4, Oct 2, 2018) stripping the borough of authority to regulate wood heaters, the STATE (DEC) took over the whole program (dec.alaska.gov/air/anpms/communities/fbks-pm2-5-curtail-alert/, checked Jul 10, 2026). The regime, under 18 AAC 50.077 (wood-fired) and 18 AAC 50.079 (coal-fired) and the EPA-approved SIP (dec.alaska.gov/air/anpms/communities/fbks-pm2-5-real-estate/, checked Jul 10, 2026): (1) Device standards & registration — only DEC-approved devices may be sold/installed in the NAA; compliant devices must be registered with DEC; coal-fired heaters and outdoor cordwood hydronic heaters are banned outright (removal mandatory, device "rendered inoperable," since Jan 8, 2020). (2) THE REAL-ESTATE RULE — unique in the nation: before the sale or lease of property in the NAA, a solid-fuel heating device (wood/pellet/coal stove, hydronic heater, fireplace insert) that is 25 years old or older with an emission rating greater than 2.0 g/hr — and any coal- or wood-fired hydronic heater regardless of age — must be removed "prior to the close of a sale (closing)" (lease: "before commencement of the lease term"), with DEC temporary waivers weighing financial hardship, technical feasibility and sensitive-population impacts; fireplaces without inserts, masonry heaters, oil- and gas-fired heaters are not affected (18 AAC 50.077/.079; SIP § III.D.7.7.5.1.2; DEC real-estate page dated June 23, 2026, dec.alaska.gov/air/anpms/communities/fbks-pm2-5-real-estate/, checked Sep 15, 2026 — the "anywhere on the property incl. outbuildings" and uncertified-device details were not on that page and need rule-text confirmation); an area-wide removal deadline of Dec 31, 2024 has already passed for the oldest devices. Alaska is the only state where selling a house can legally require tearing out the wood stove. Ordinary open fireplaces (no insert) and masonry heaters are expressly exempt. (3) Burn bans: DEC issues winter curtailment episodes — at a Stage 2 alert (24-hr PM2.5 ≥ 30 µg/m³) operating a non-exempt solid-fuel device is prohibited and combustion must cease within 3 hours, unless the household holds a No-Other-Adequate-Source-of-Heat (NOASH) or temporary waiver (dec.alaska.gov curtailment page; verify Stage 1 threshold before publish). Change-out grant money has flowed repeatedly ($5M 2019, newsminer REF; $10M EPA 2024, REF), and air quality is measurably improving (Alaska Beacon, May 12, 2025 — REF). Statewide: DEC "Burn Wise Alaska" is guidance; no statewide burn-day regime outside the NAA — absence finding. Rural Alaska is among the most wood-heat-dependent places in America (REF), often with no code authority (§5), so creosote risk management is entirely on the owner: extreme cold drives flue-gas condensation → glaze creosote and chimney ice plugs are the signature Interior failure modes (editorial framing; NFPA 211 annual inspection = NATIONAL STANDARD). Wildfire/WUI: Division of Forestry publishes defensible-space/Firewise guidance (REF), but no statewide spark-arrestor or WUI chimney statute was found — NOT CONFIRMED; state the absence.

STATE LAW: AS 18.70.095 — smoke detection devices "shall be installed and maintained in all dwelling units in the state," and CO detection devices in all "qualifying dwelling units": any dwelling with a carbon-based-fueled appliance, an attached garage or carport, or even adjacency to a parking space (justia.com/codes/alaska/title-18/chapter-70/article-1/section-18-70-095, checked Jul 10, 2026) — a definition so broad that every wood-, oil-, or gas-heated home in Alaska qualifies, existing stock included, with no new-construction limitation. Rentals: at each occupancy the landlord must provide working smoke and (if qualifying) CO devices and must repair/replace after tenant notice; tenants maintain batteries; a landlord who neither knew nor was notified gets a negligence shield (AS 18.70.095(b)–(c)). Device type/installation per State Fire Marshal regs (13 AAC 55). No pre-sale CO certificate exists — but the state disclosure form carries a "CO Detector(s)" defect checkbox (§3). This is the strongest CO statute in the launch set on paper — statewide and retroactive — while enforcement is realistically complaint-driven, especially where no building department exists (§5); a permitted or DEC-regulated stove job is the natural compliance moment.