District of Columbia: HVAC contractor licensing, reciprocity and contract rules.

This page lists what District of Columbia 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.

District of Columbia, field by field.

Contractor licensing authority

District of Columbia Department of Licensing and Consumer Protection (DLCP), Occupational and Professional Licensing, Board of Industrial Trades. D.C. Code § 47-2853.04(c) states that the listed occupations are regulated by the Mayor through the Department of Licensing and Consumer Protection; the Board page lists the trades it covers as asbestos workers, plumbers, electricians, refrigeration and air conditioning mechanics, steam and operating engineers and the elevator trades.

HVAC licence required

District-wide. D.C. Code § 47-2853.04(a) lists "Refrigeration and Air Conditioning Mechanic" (item 36) among the non-health occupations determined to require regulation; § 47-2853.201 defines the mechanic as a person who "designs, installs, maintains or alters mechanical systems for refrigeration or air conditioning" of buildings or vehicles. 17 DCMR § 303.1: "no person shall engage in or be employed in the business of installing, maintaining, repairing, or replacing refrigeration and air conditioning equipment, within the limits set forth in §301, without being licensed to do so"; § 303.6 requires a business to first secure a Refrigeration and Air Conditioning Contractor, Master Refrigeration and Air Conditioning Mechanic, or Master Refrigeration and Air Conditioning Mechanic Limited licence, and § 303.7 requires a Journeyman Refrigeration and Air Conditioning Mechanic's licence for the mechanical work of installation, maintenance, repair or replacement (§ 303.2 exempts persons working under the personal supervision and permit of a licensed master). § 301 limits licensees' electrical work to the load side of a disconnecting means within ten feet of the motor and their plumbing work to the equipment side of a shut-off valve and approved drain installed under permit. Exemptions in § 302 include self-contained unit systems containing not more than two pounds of refrigerant (§ 302.5), equipment in motor vehicles or railroad rolling stock, federal-contract work and franchised public utilities. DLCP's application instructions state "Licenses are offered for refrigeration and air-conditioning" at Apprentice, Journeyman and Master levels and "Limited licenses are offered for work done at 25 horsepower and below". No dollar threshold appears in the Code sections or in 17 DCMR chapter 3 as read.

Licence classes & qualifications

Refrigeration and Air Conditioning Contractor; Master Refrigeration and Air Conditioning Mechanic; Master Refrigeration and Air Conditioning Mechanic Limited (systems up to and including 25 compressor horsepower or the equivalent tons of refrigeration in the aggregate); Journeyman; Apprentice (17 DCMR §§ 303–307). 17 DCMR § 305.1: a contractor licence may be issued to a person, firm or corporation whose business "shall be conducted at a specified location" and is conducted by or regularly employs at least one holder of a Master or Master Limited licence; § 305.2 limits the contractor to systems of 25 compressor horsepower or less if its highest-grade licensee is a Master Limited; § 305.4 requires a named "designated master mechanic" who supervises the work performed under the contractor's permits; § 305.10 requires a separate licence and bond for each business location. D.C. Code § 47-2853.202: a master applicant shows "at least 5 consecutive years immediately preceding the date of application" working on systems "larger than 25 compressor horsepower or the equivalent tons of refrigeration in the aggregate", verified in writing by a master mechanic; a master limited applicant shows the same period on systems "less than 25 compressor horsepower" plus chlorofluorocarbon certification; § 47-2853.202(d) requires the Board to accept a national certifying organization's certificate (completed apprenticeship, passed examination, journeyman designation) in place of its examination, experience or skill requirements. DLCP instructions: the journeyman exam requires "3 years' experience" (or an exam waiver on completion of an apprenticeship of "8,000+ hours/4 years"); the master exam requires "5 years' experience" plus CFC Universal Certification; "The exam is open book"; exams are scheduled through PSI (the Board page directs applicants to psiexams.com). Fees (Board page): application $65; mechanic licence $110; contractor licence $120.

Insurance / bond minimum

Bond: 17 DCMR § 311.5: "The required bond shall be in the penalty of five thousand dollars ($5,000)", running to the District with corporate surety (§ 311.1); § 305.9 conditions a contractor licence on furnishing and keeping the bond in force. The DLCP Refrigeration and Air Conditioning Bond form binds the principal "in the full and just sum of five thousand dollars ($5,000.00)", states that "a separate bond must be completed and submitted for each licensee" (designated master or contractor) and runs through September 30 of the even year; the DLCP renewal bulletin of 07/27/2026 states that where a master is designated to a contracting company "a bond in the amount of $5,000.00 must be submitted for the master" and "a bond in the amount of $5,000.00 must be submitted for the contracting company". General-liability insurance: no insurance requirement appears in 17 DCMR chapter 3 (§§ 300–399, which contain a bonding section but no insurance section) as read; the Board page states only that the Board "may establish bonding and insurance requirements".

Reciprocity

None published for refrigeration and air conditioning. The Board page's reciprocity provisions cover journeyman and master electricians licensed by examination in Maryland and Virginia, and its updates list reciprocity for Maryland plumbing professionals.

Renewal & continuing education

Board page: "Expiration Date: September 30; Renewal Year: Even"; DLCP instructions: licences "expire September 30 on even-numbered years"; D.C. Code § 47-2853.12(l): "A license, certificate or registration, expires 2 years from the date of its first issuance or renewal" unless another period is set by law or regulation (17 DCMR § 303.9, adopted under a 1955 Commissioners' Order, still refers to a one-year licence period). Renewal fees are $155 (mechanic) and $180 (contractor), late fee $50 (Board page); the 07/27/2026 bulletin states "License renewal applications must be submitted by September 30, 2026, expiration date." 17 DCMR § 312.1 conditions renewal on paid permit fees, satisfactory work, an approved application and any required bond, and the renewal fee; § 312.4 allows a lapsed licensee to renew without re-examination if the written application is made within 30 days after expiration, the licensee submits a notarized statement of not having practised while unlicensed, and appears before the Board. No continuing-education requirement is published on the Board page, the application instructions, the renewal bulletin or 17 DCMR chapter 3; D.C. Code § 47-2853.12(m) permits each board to establish continuing education requirements by rule.

Home-improvement contract rule

16 DCMR chapter 8 (Home Improvements). § 899 defines a "home improvement contract" as an agreement for home improvement work "for a contract price of three hundred dollars ($ 300) or more" (including later agreements between the same contractor and homeowner aggregating $300 within 12 months) and "home improvement work" as the addition to, alteration, conversion, improvement, modernization, remodeling, repair or replacement of residential property (single- or two-family dwellings); the definition excludes "work performed by licensed electricians, plumbers and gasfitters, or refrigeration and air conditioning mechanics, so long as the work performed by them is limited to that of their licensed occupation", new residential construction, and appliances or equipment not made part of the realty. § 800.1: no person shall require or accept any payment for a home improvement contract "in advance of the full completion of all work" unless licensed as a home improvement contractor (or as a licensed salesperson of one). § 802.1 requires a home improvement contractor's bond "in the penal sum of twenty-five thousand dollars ($ 25,000)" (or cash, certified check or government securities under § 802.5); § 803.2 requires public liability and property damage insurance of $50,000 per person and $100,000 aggregate for bodily injury or death and $10,000 property damage in any single accident (self-insurance alternative, § 803.3). § 808: no payment may be accepted until the understanding has been reduced to a written contract (§ 808.1), signed in at least triplicate with all blanks filled (§§ 808.2, 808.14); the contract must bear the contractor's name, address, telephone number and licence number (§ 808.9), the terms of payment and the approximate start and completion dates (§ 808.10), and a set of specifications (§ 808.12), and must carry a notice in bold type no smaller than ten point that the homeowner should not sign in blank and is entitled to a copy (§ 808.15); a contract not binding until accepted by the contractor must be accepted or rejected in writing within 15 days, with any payment returned on rejection (§§ 808.6–808.8). DLCP licenses "Home Improvement Contractor" as a Basic Business License in the Contractor and Construction Services category, listing a "Surety Bond ($25,000)", a Certificate of Liability Insurance, a sample home improvement contract, a Certificate of Occupancy or Home Occupation Permit, a police criminal history report and Clean Hands certification, at $99 for a 2-year licence; home improvement contractors and residential general contractors must maintain a Basic Business License for at least one Home Improvement Salesperson. §§ 800, 802 and 899 cite Final Rulemaking at 56 DCR 3098 (April 24, 2009). No right-to-cancel window beyond the federal rule and no deposit percentage cap appear in the sections read (§§ 800–803, 808, 899).