Colorado: HVAC contractor licensing, reciprocity and contract rules.

This page lists what Colorado publishes about licensing an HVAC or mechanical contractor and contracting with homeowners: who issues the licence, whether one is required statewide, the classes and qualifications, insurance or bond minimums, reciprocity with other states, renewal and continuing education, and the state's home-improvement contract statute if it has one.

It is built for owners of residential HVAC companies, especially those hiring across a state line or opening a second territory. Every entry is a snapshot of what the cited source published on the verification date; it is a research starting point, not legal advice.

Colorado, field by field.

Contractor licensing authority

None at state level for HVAC or mechanical contractors. The Colorado Department of Regulatory Agencies (DORA), Division of Professions and Occupations (DPO), publishes the list of occupational professions it regulates; the construction credentials on that list are Electrical (Electrical Apprentice, Electrical Contractor, Journeyman Electrician, Master Electrical, Photovoltaic Installer, Residential Wireman) and Plumbing (Apprentice Plumber, Journeyworker Plumber, Master Plumber, Plumbing Contractor, Residential Plumber); HVAC, mechanical, heating and air conditioning do not appear on the list. The Colorado Attorney General's consumer alert states: "Make sure your plumber or electrician is properly licensed by the State before starting any work. Check with your local government to determine if your contractor is properly licensed."

HVAC licence required

None at state level. DPO's Colorado DPO Occupational Professions List (read 2026-10-14) contains no HVAC or mechanical contractor credential, and the Attorney General directs homeowners to "Check with your local government to determine if your contractor is properly licensed"; state licensure applies to the electrical and plumbing trades through the State Electrical Board and State Plumbing Board (DPO Electrical and Plumbing program pages). No official page stating in words that Colorado does not license HVAC contractors was located in this pass.

Licence classes & qualifications

No state HVAC or mechanical licence class appears on the DPO list; licence classes, examinations and experience for HVAC work are set by local jurisdictions and were not researched in this pass. State electrical licences (Residential Wireman, Journeyman Electrician, Master Electrician, Electrical Contractor) and plumbing licences (Residential Plumber, Journeyworker Plumber, Master Plumber, Plumbing Contractor) are issued through DPO.

Insurance / bond minimum

Not stated in this pass (no state HVAC licence; local requirements not researched).

Reciprocity

None published (no state HVAC licence).

Renewal & continuing education

None at state level for HVAC. For the state electrical licences, the DPO Electrical Board page states: "All Residential Wireman, Journeyman Electricians and Master Electricians with an Active Colorado license must complete at least 24 hours of Continuing Education (CE) during each 3 year license period."

Home-improvement contract rule

No general home-improvement contract statute was located: the phrase "home improvement" does not appear in the 2024 Colorado Revised Statutes Title 6 (Consumer and Commercial Affairs) text as searched. Roofing only — C.R.S. §6-22-103(1): "Prior to engaging in any roofing work, a roofing contractor shall provide a written contract to the property owner, signed by both the roofing contractor or his or her designee and the property owner", stating the scope of services and materials, approximate dates and costs, the contractor's contact information, its surety and liability insurer, and "a rescission clause allowing the property owner to rescind the contract and obtain a full refund of any deposit within seventy-two hours after entering the contract" (§6-22-103(1)(f)(I)), plus a bold-faced statement on the face of the contract that the contractor "shall hold in trust any payment from the property owner until the roofing contractor has delivered roofing materials at the residential property site or has performed a majority of the roofing work on the residential property" (§6-22-103(2)). §6-22-104(1)(a) gives the owner a right to rescind within seventy-two hours after written notice that the property insurer has denied the claim in whole or in part, with payments returned within ten days (§6-22-104(2)); §6-22-105 provides that a roofing contractor paid from insurance proceeds "shall not advertise or promise to pay, waive, or rebate all or part of any insurance deductible". The Attorney General's alert of October 14, 2020 restates these roofing terms.