District of Columbia
License Exam Preparation

General Info

You must be licensed to do electrical, plumbing, asbestos abatement, home improvement or refrigeration and air conditioning work in Washington DC.

Reciprocity

There is no reciprocity with any other jurisdiction.

Districtwide Classifications

	Electrical
220	Master Electrician
307	Journeyman Electrician
308	Elevator Electrician
309	Low Voltage Electrician
•	Standard Maintenance Electrician
337	Master Sign Electrician
338	Journeyman Sign Electrician
824	Residential Maintenance Electrician

	Plumbing
303	Master Plumber
304	Master Plumber with Gas
300	Master Gas Pipe Fitter
302	Journeyman Plumber
310	Journeyman Plumber with Gas
301	Journeyman Gas Pipe Fitter

	Mechanical
311	Master Air Conditioning and Refrigeration Mechanical Unlimited
312	Journeyman Air Conditioning and Refrigeration

Additional Notes
•	Green bullets or trade codes indicate a recently updated page.
•	Trade codes refer to ICC exam ID numbers.

Districtwide Classifications