HVAC Contractor License in District of Columbia: Requirements, Qualifier, Bond and Exams

Yes — District-wide.

DC licenses the refrigeration and air-conditioning trade through the DLCP Board of Industrial Trades: mechanics are licensed individually at apprentice, journeyman and master levels, with limited licenses for work done at 25 horsepower and below, and the business that contracts for the work needs a separate trade contractor license from the same board.

This page covers the business license.

The worker-side mechanic licenses are their own track, with their own DC guide on this site.

The issuing agency is the DLCP Board of Industrial Trades.

For this trade our research records one contractor classification: Refrigeration/Air Conditioning — the row in DLCP's trade contractor table that carries the two $5,000 bonds and the September 30 (even year) expiry.

The sources we read show no Class A/B split, no limited contractor version and no job-value tiers for HVAC contractors; that is what we checked, not a promise about DLCP's full classification list, so confirm the current classes with the Board.

DLCP's trade contractor instructions also carry the company-side steps: the company registers with DLCP Corporations, and the designated master accepts the designation.

The qualifier is a DC-licensed master refrigeration and air-conditioning mechanic whom the company designates.

The master credential's experience bar is set in the D.C. Code: at least 5 consecutive years, immediately before applying, spent working on systems larger than 25 compressor horsepower, verified in writing by a master mechanic.

A limited master credential also exists — 5 years on systems under 25 horsepower plus CFC certification — but our sources do not say whether a limited master can serve as a contractor license's designated master, so ask the Board before you build your qualifier plan around one.

The credential chain explains where a qualifier comes from: apprentices register with no experience (they must show employment verification or school enrollment) and work only under a licensed master's direct personal supervision, and sitting the journeyman exam takes 3 years' experience plus EPA CFC Universal certification — the exam itself is waived for graduates of a nationally certified apprenticeship.

Whether the designated master must be an owner or may be an employee is not stated in our research — put the question to the Board when you apply.

None.

The Board's trade contractor instruction sheet states that there is no exam required to obtain a contractor's license — no trade exam and no separate business-and-law exam — and the license's designated master is responsible for supervising the work and the people on the company's projects.

The exams that do exist in this trade sit on the mechanic licenses: DC's refrigeration/air-conditioning mechanic exams are open book, with study references listed as the 2012 International Mechanical Code and Modern Refrigeration and Air Conditioning (2004).

The exam vendor was not found in our research — check with DLCP before scheduling anything.

Bonds are the requirement our research confirms: a DC refrigeration/air-conditioning contractor license requires surety bonds of $5,000 for the company and $5,000 for the master, and the license and its bonds expire September 30 of even years.

Both amounts sit on the Refrigeration/Air Conditioning row of DLCP's trade contractor table.

Insurance is the open part: the sources we read set no insurance minimum for HVAC contractor applicants, so ask the Board what proof of coverage, if any, your application needs.

The renewal clock is fixed: DC refrigeration/air-conditioning licenses expire September 30 of even-numbered years, regardless of when they were obtained, and the contractor license and its two bonds run on that same date.

The price is the gap: DC trade license fees for refrigeration/AC were not found in the sources we read, and neither was any continuing-education requirement, so price the license from DLCP's current fee schedule rather than from this page and confirm any CE with the Board before you renew.

Our research did not find a reciprocity arrangement for DC refrigeration/air-conditioning contractor licenses — the Board pages we read describe none.

What the facts do establish is what the license rests on either way: a DC-licensed master to designate, with the master credential's own experience bar of at least 5 consecutive years on systems larger than 25 compressor horsepower immediately before applying, verified in writing by a master mechanic.

That window is the 5 consecutive years immediately before the application, so confirm with the Board how out-of-state experience is treated before you count older work toward it.

Our research did not find a replacement deadline: whether the Board must be notified, and by when, when the designated master leaves was not found in DLCP's trade contractor instructions.

Whether one master may be the designated master for more than one company is open too — treat it as a Board question.

What is established is what the master carries: the designated master is responsible for supervising the work and the people on the company's projects, and the license requires a designated master.

If yours leaves, ask the Board promptly about replacing the designation.