Oklahoma: who needs a license to work on your chimney or fireplace?
Checked Jul 2026·Laws as cited·Not in the Sep 2026 verification pass
Public recordOK LAW
For consumer remedies, home-sale rules and carbon monoxide law, see Oklahoma chimney & fireplace laws — know your rights. That page was verified more recently than this matrix.
Stove & insert installation: is a credential required in Oklahoma?
#stove-installLICENSE- Credential
- THE BATCH HEADLINE — Oklahoma has a dedicated hearth license, invisible to Pass 1's gas-piping lens, and it is the DEEPEST NFI-IN-LAW INTEGRATION IN THE NATION: the CIB 'Fueled Hearth Product Work' mechanical license category covers 'the installation, service or repair of biomass-fueled or natural gas-fired fireplace, fireplace insert, stove or log set and associated venting and piping' (OAC 158:50-1-2) — biomass = wood/pellet, so SOLID-FUEL stove and insert installs are licensed mechanical work; the competency gate is NFI ALONE: 'Applicants for a Fueled Hearth Product Work license shall provide proof of having been certified by examination in accordance with NFI in one of the three (3) categories: gas, wood, or pellets' (158:50-9-1(c), fetched); NO work-experience requirement (158:50-5-2(b)(10)(F) — vs NJ's NFI + 5 yrs); licensee locked to their NFI fuel category ((b)(10)(D)-(E)); NFI CE satisfies state CE ((b)(10)(H)); current NFI certification is a condition of renewal ((b)(10)(I)); contractor tier adds business/law exam OR 3-of-6 business-history alternatives + GL/bond/WC ((b)(10)(B); $50k CGL + $5k bond, per Pass 4); CAVEAT: the statutory 'heating systems' definition (59 O.S. § 1850.2(5), fetched) is distribution-scoped ('air heating appliances from which the heated air is distributed' — the NC-family line-drawing), so the solid-fuel capture rests on the CIB rule rather than clean statute text; permits: OKC/Tulsa mechanical desks; 2018 IRC/IMC statewide minimum with 2024 editions eff. 9/14/2026
- Issuing body
- Oklahoma Construction Industries Board (Mechanical Licensing Act; Committee of Mechanical Examiners)
- Statute
- 59 O.S. § 1850.2(5) and (10) (definitions — licensure-duty section not re-pinned, see notes); OAC 158:50-1-2, 158:50-5-2(b)(10), 158:50-9-1(c)
- Dollar threshold
- none
- Exam
- y (the NFI examination IS the required exam — wood/pellet/gas category; contractor tier adds business/law or documented alternatives)
- Local overlay
- y — OKC/Tulsa city registration at the permit desk (per Pass 1); rural OK often has no permit office
- Confidence
- high (rule text fetched in full); medium (statutory anchoring of the solid-fuel capture) · checked 2026-07-22
- Sources
Chimney flashing: is a credential required in Oklahoma?
#chimney-flashingREGISTRATION- Credential
- CIB Roofing Contractor Registration (the June-2010 act born within ~60 days of the May 2010 OKC hailstorm, per rights research) — 'roofing contractor work' means work on 'roofing systems as defined in the International Building Code and the International Residential Code, as adopted by the Oklahoma Uniform Building Code Commission' including 'installation, renovation, remodeling, reroofing, reconstructing, repair, maintenance, improvement, alteration, and waterproofing' (59 O.S. § 1151.2): chimney flashing is IRC roof-assembly work (R903 flashing) → registered work with NO dollar floor; unregistered roofing = misdemeanor up to $500 per violation; insurance STATE-FILED: GL not less than $500,000 for residential work / $1,000,000 for the commercial endorsement (per CIB); NEW REGIME EFF. 7/1/2026 (HB 1628 — took effect three weeks before this research): a RESIDENTIAL ROOFING ENDORSEMENT with a CIB-approved EXAM (70% pass) is now required for residential roof work; registrants in good standing on 7/1/2026 get a 12-month grandfather window (pass the exam OR complete 10 hrs approved CE) — the OK/LA twin: two states converted no-exam roofing registrations into exam-gated credentials within seven months of each other (LA Act 422 eff. 1/1/2026); EXEMPTIONS: property owner/family/employees roofing their own residential or farm property, and a handyman doing a roofing repair in conjunction with other repairs at <= 2 roofing jobs per year — the exact posture of a chimney shop that flashes occasionally (a shop ADVERTISING flashing exceeds the exemption: solicitation is inside the definition)
- Issuing body
- Oklahoma Construction Industries Board (Roofing Contractor Registration Act)
- Statute
- 59 O.S. §§ 1151.1-1151.29 (1151.2 definitions; HB 1628 of 2025, endorsement eff. 7/1/2026)
- Dollar threshold
- none
- Exam
- y (residential endorsement exam eff. 7/1/2026, grandfather window to 7/1/2027; commercial endorsement trade + business/law exam pre-existing)
- Local overlay
- y — OKC/Tulsa city registration at the permit desk
- Confidence
- high · checked 2026-07-22
- Sources
Gas fireplace service: is a credential required in Oklahoma?
#gas-fireplace-serviceLICENSE- Credential
- CIB Mechanical Contractor or Journeyman (HVAC/R Unlimited; HVAC/R Limited ≤25 tons/500,000 Btu/h — both include natural gas piping) OR licensed plumbing contractor/journeyman plumber (59 O.S. § 1850.10(A) cross-recognizes both); for PROPANE appliances the lane is instead an Oklahoma LP Gas Administration Class IV Installer permit (or work under a Class I Dealer)
- Issuing body
- Oklahoma Construction Industries Board (CIB) for natural gas; Oklahoma LP Gas Administration / LP Gas Board for propane
- Statute
- 59 O.S. §§ 1850.1–1850.17 (Mechanical Licensing Act; § 1850.2(4)&(10) definitions; § 1850.10(A)(1)-(2) gas piping + floor furnaces/wall heaters); 59 O.S. § 1001 et seq. (Plumbing License Law); 52 O.S. §§ 420.1–420.15 + OAC 420:10-1-5 (LP Gas)
- Dollar threshold
- none — no dollar floor; the license duty attaches to the work itself at $0 (flat prohibition in § 1850.10(A): "No person shall install, replace or repair gas piping unless…licensed")
- Exam
- yes — CIB written exam, quarterly, Committee of Mechanical Examiners (59 O.S. § 1850.6; 30/90-day retake lockouts); LP Class IV: written exam per endorsement after 2-week supervised period, NFPA 54/58-based, 80% pass (CIB mechanical licensees exempt from the 2-week training)
- Local overlay
- OKC and Tulsa accept the state CIB license (no city trade exam) but require city contractor REGISTRATION before pulling permits; 59 O.S. § 1850.12 expressly preserves municipal permits/inspections/registration; § 1850.15 makes the state license valid statewide
- Confidence
- high · checked 2026-07-10
- Sources
Gas log installation: is a credential required in Oklahoma?
#gas-log-installLICENSE- Credential
- Distinct limited lanes exist: (1) natural gas — CIB Natural Gas Piping Contractor license (limited class: "all natural gas piping (from the point of delivery to the connections with the appliances)" — the exact scope of a gas-log hookup), created under § 1850.8(C) limited-license authority; (2) propane — LP Gas Class IV Installer permit with LP/HP endorsements; note the Class IV RHM endorsement literally covers "cleaning gas logs" and relighting pilots and NOTHING more (OAC 420:10-1-5(b)(4)(A)(vii))
- Issuing body
- Oklahoma Construction Industries Board (CIB); Oklahoma LP Gas Administration / LP Gas Board
- Statute
- 59 O.S. § 1850.8(C) (limited licenses) + § 1850.10(A)(1); OAC 420:10-1-5(b)(4) (Class IV Installer + endorsements incl. RHM)
- Dollar threshold
- none — no dollar threshold
- Exam
- yes — CIB exam for Natural Gas Piping Contractor class; LP Class IV written exam per endorsement (NFPA 54 LP / NFPA 58 HP), 80% pass
- Local overlay
- same as gas-fireplace-service: OKC/Tulsa city registration rides on top of the state license; no separate city exam
- Confidence
- high · checked 2026-07-10
- Sources
What insurance does Oklahoma require of contractors?
#insurance- Regime
- license (CIB mechanical/plumbing for gas work; LP Gas permits for propane) — but NONE for pure chimney work, which has no license and therefore no state-mandated GL at all
- Liability minimum
- CIB active mechanical/plumbing/electrical contractor: minimum $50,000 commercial general liability, STATE-VERIFIED — certificate of insurance filed with CIB, CIB named as certificate holder, insurer must give cancellation notice; lapse auto-inactivates the license and contracting while lapsed is a violation. LP Gas (OAC 420:10-1-18): Class I Dealer $1,000,000/occurrence + $1,000,000 aggregate GL incl. products/completed-operations; Class IV Installer $500,000/$500,000; COI filed with LP Gas Administrator before permit issues, 30-day cancellation notice to Administrator; statutory floor + bond/securities-in-lieu option at 52 O.S. § 420.4. Roofing (contrast): $500k res/$1M comm under 59 O.S. § 1151.1 et seq.
- Bond
- CIB: $5,000 corporate surety bond, obligee = Oklahoma Construction Industries Board, in the individual license holder's name, continuous with 30-day cancellation notice — a compliance bond running to the state, not a consumer-restitution fund; TRAP: license can go inactive-status with bond/insurance dropped (59 O.S. § 1850.8(B)), and CIB publishes an "Affidavit for Mechanical (Waiver for Bond & Insurance)" — waiver conditions UNVERIFIED; LP alternative: Board may accept deposited securities or indemnity bond in lieu of insurance certificate (52 O.S. § 420.4). Tulsa city registration bonds ~$5k–$10k (third-party figure, UNVERIFIED)
- Guaranty fund
- NONE — Oklahoma has no contractor guaranty/recovery fund of any kind; no fund appears in the Mechanical Licensing Act, CIB rules, or the Roofing Registration Act (verified by absence across primary sources); the $5k CIB bond is the only pot and it runs to the Board
- Workers' comp threshold
- 1 employee — coverage required upon hiring even one full/part-time worker (85A O.S., Administrative Workers' Compensation Act; § 38 duty to secure); exemptions: sole proprietors/partners need not cover themselves; agricultural employers under $100k prior-year payroll; certain family-member employment excluded from "employee" (85A O.S. § 2 — subsection detail UNVERIFIED); owner-occupied single-family residence exception shields the HOMEOWNER from liability for an independent contractor's injuries (85A O.S. § 36); CNC ARTIFACT CONFIRMED: Certificate of Noncoverage issued by the OK Workers' Compensation Commission to sole props/partners under 85A O.S. § 36 + OAC 810:25-5-1 — notarized application, $50 fee, valid 2 years, conclusively presumes non-employee status vs the prime contractor
- How to verify
- WC: free public coverage search (business name or FEIN) via the Oklahoma Workers' Compensation Commission, entry at https://www.wcc.ok.gov/ — NCCI-powered proof-of-coverage; returns business name + policy number only; dedicated public CNC lookup UNVERIFIED (apply/verify through WCC). GL/bond: CIB holds the COI and bond on file — license status lookup at https://cibverify.ok.gov reflects active vs inactive (inactive = bond/insurance not current). LP permits: COI on file with LP Gas Administration (lpgas.ok.gov); no public LP insurance lookup found
- Confidence
- high · checked 2026-07-10
- Sources
Download the full licensing matrix (CSV) · All states
Before anyone goes on your roof
What should you ask a chimney company in Oklahoma?
- Is your company a member of the National Chimney Sweep Guild (NCSG)?
- Does the technician coming to my home hold an individual NCSG certification, and which one?
- Does the technician hold a National Fireplace Institute (NFI) certification — and for which fuel: wood, gas, or pellet?
- What other certifications does the technician hold (for example, CSIA), and can I check them on the issuer's own roster?
- What state or local license or registration covers this work here, and what is the number?
- Will you send a certificate of insurance, dated and naming your company, before work starts?
- Which NFPA 211 inspection level — Level 1, 2, or 3 — are you performing, and why that level?
- Will you show me what you found — photos or video of the flue — in writing?
We take no fee from any certification body, guild, or contractor, and are not paid to mention anyone named.