Montana chimney & fireplace laws: know your rights

Montana CONFIRMS the license⇄disclosure inverse-correlation verdict — as a weak/weak-to-moderate case that leans the expected way. It has no competency license at all (only a workers'-comp-based credential, renamed a "license" in 2026, that tests nothing), and for decades it had no disclosure duty either — pure caveat emptor. So on the licensing axis it sits at the floor. The 2023 disclosure statute (§ 70-20-502) nudges it up on the sale axis, but only to a thin, actual-knowledge, no-duty-to-investigate standard — so the state stays low-license / low-to-moderate-disclosure, consistent with the rule that weak-licensing states don't over-protect at sale. The sharp content: there is nothing about a Montana contractor's chimney competence to look up — the license tests workers'-comp compliance, not your flue — so an independent inspection and individual certs are the only real signal. The oddball twist worth flagging on the page: Montana is a rare mountain-west state with a genuine statewide building code (moving from the 2021 to the 2024 IRC on Sep 26, 2026), yet rural enforcement is patchy — the code exists on paper more evenly than in practice.

Montana has no competency-based credential for chimney work — its contractor credential is tied to workers' comp, not skill. STATE LAW: HB 239 (Ch. 644, L. 2025) converted the old Construction Contractor Registration (formerly Title 39, ch. 9) into a Construction Contractor License (CCL) under Title 37, ch. 45 (MCA § 37-45-201 et seq.), effective Jan 1, 2026; existing registrations converted automatically on that date with the same expiration dates and unchanged cost. The program now sits with the DLI Business Standards Division (boards.bsd.dli.mt.gov/construction-contractor). § 37-45-201 requires an individual or business "engag[ing] in business as a construction contractor" to hold a current license; the application asks only for identifying information and "proof of compliance with workers' compensation laws" — no exam, no experience requirement, no liability-insurance requirement appears in the statute, and the implementing rules (ARM 24.227.401 et seq.; $70 application/renewal fee) add no exam or education. Exemptions (§ 37-45-104): an independent contractor with no employees (who may register voluntarily), and single jobs with an aggregate contract price under $2,500. Sole proprietors typically carry an Independent Contractor Exemption Certificate (ICEC) from DLI-ERD for workers'-comp purposes instead. Public lookup: via the BSD construction-contractor program page.

As wide as any state — arguably wider, because even the new Title 37 credential tests nothing. A licensed Montana contractor may never have inspected a flue; the CCL (like the registration it replaced) attests to workers'-comp compliance, not masonry or diagnostic skill — and a one-person sweep with no employees is exempt from even that. There is nothing statewide to verify about chimney competence. Individual certs (NCSG CCP/CCR; CSIA CCS, C-DET) and an independent audit fill a total vacuum. This is the pure "registered ≠ qualified" story.

Montana was a caveat-emptor state until 2023 — now it has a statutory disclosure duty, but a thin one. STATE LAW: MCA § 70-20-502 (Title 70, Ch. 20, Part 5 — Residential Real Property Disclosure), enacted 2023, requires a seller of residential real property to give the buyer a disclosure statement of adverse material facts of which the seller has actual knowledge — covering title, water, wastewater, utilities, "any structural system or improvement, including any well, septic system, roof, foundation, plumbing, electrical system, heating system, windows, doors, or appliances," unpermitted additions, hazardous materials/pests, drainage, and testing for radon/mold/meth etc. The seller is not obligated to investigate. The statute prescribes no form and does not name chimney or fireplace — a flue defect falls under "structural system or improvement … heating system." If the statement is delivered after the contract is signed, the buyer gets 3 days to rescind (§ 70-20-504; waivable in the offer). No inspection is mandated at transfer; NFPA 211 Level 2 stays a NATIONAL STANDARD.

STATE LAW: the Montana Unfair Trade Practices and Consumer Protection Act of 1973 (MCA § 30-14-101 et seq.), enforced by the DOJ Office of Consumer Protection (dojmt.gov), gives a private right of action; under § 30-14-133 a consumer recovers the greater of actual loss or $500, the court may award up to three times actual damages (where actual damages do not exceed $100,000), and may award the prevailing party attorney fees (capped at $250/hour; not available if the consumer recovers $100,000 or more). Door-to-door/personal-solicitation sales carry a right to cancel until midnight of the third business day after signing (§ 30-14-504) under the Personal Solicitation Sales part (MCA § 30-14-501 et seq.), with the mandatory notice-of-right-to-cancel language at § 30-14-505. No home-improvement guaranty fund exists — unlike MD/NV/AZ, a wronged Montana homeowner has no state-funded backstop.

The door-knock "we noticed your chimney" pitch is a textbook Personal Solicitation Sales (§ 30-14-501) + UTPCPA violation, and the DOJ Office of Consumer Protection is the complaint venue. Specific Montana AG chimney-sweep enforcement actions: NOT CONFIRMED — no state-specific alert surfaced; re-run search before publish. National pattern only (deposit-and-vanish; manufactured "unsafe/CO" urgency).

STATE LAW: Montana has a real statewide building code, adopted and amended under ARM Title 24, ch. 301 and administered by the DLI Building Codes Program (bsd.dli.mt.gov). CORRECTED Sep 25, 2026: the DLI "Current Codes" page now lists the following:

• 2024 editions effective September 26, 2026: International Building Code, International Residential Code, International Existing Building Code, Uniform Plumbing Code, International Swimming Pool and Spa Code, and Wildland Urban Interface Code; also the 2023 National Electrical Code.
• 2021 editions staying in effect (from June 11, 2022): International Mechanical Code, International Fuel Gas Code, and International Energy Conservation Code.

Through Sep 25, 2026 the 2021 IRC governs. From Sep 26, 2026 the 2024 IRC does. The adopting MAR notice itself was not read; the draft was MAR 2026-95.2. The IRC's Chimneys & Fireplaces chapter (Ch. 10) and the 2021 IMC's Chapter 9 (solid-fuel-burning appliances) govern chimney construction, clearances, and stove installs. Relines, rebuilds, crowns, and solid-fuel appliance installs are generally permit work; sweeps and like-for-like caps generally are not. Caveat: many rural counties and unincorporated areas have not adopted local enforcement, so the code exists statewide but building-department coverage is uneven.

Montana is a high wood-heat, cold state — this section matters. Open burning is regulated by Montana DEQ (deq.mt.gov/air): allowed year-round but county-permitted in spring/summer, DEQ-restricted in fall by dispersion forecast, and case-by-case in winter (some valleys, e.g., Missoula, have historically had winter inversion/air-quality controls — verify current local rules). WUI/wildfire is a live concern across the forested west of the state; spark-arrestor caps are a code/insurance expectation in fire-prone country though not a distinct statewide statute; the state's adopted code set includes the Wildland Urban Interface Code — 2021 edition, replaced by the 2024 edition effective Sep 26, 2026 (bsd.dli.mt.gov current codes), whose reach depends on local WUI mapping/enforcement NOT YET CONFIRMED confirm how it is applied locally. No statewide wood-stove-emission or change-out mandate confirmed.

STATE LAW: MCA § 70-24-303 (Residential Landlord-Tenant Act) requires landlords to install an approved CO detector in each dwelling unit under the landlord's control, "in accordance with rules adopted by the department of labor and industry," and verify it works at lease commencement; the tenant maintains it thereafter, and the landlord is not liable for detector failure. (Placement details — fuel-fired appliance/attached garage trigger, outside sleeping areas — come from the DLI rules/IRC, not the statute text.) New construction is covered via the state-adopted IRC: the 2021 edition, and the 2024 edition from Sep 26, 2026. No statewide pre-sale CO certificate and no owner-occupied mandate. A permitted chimney job is the natural moment to add alarms.