Southern California contractors by trade

Pick a trade to see how many licensed contractors each county and city has, then open a local list. A license can hold several classifications, so it can appear under more than one trade.

Trade	Class	Licenses	Active
General Building	B	53,311	50,821
Electrical	C-10	15,157	14,593
Plumbing	C-36	10,188	9,742
Painting & Decorating	C-33	7,667	7,261
Warm-Air Heating, Ventilating & Air-Conditioning (HVAC)	C-20	6,897	6,564
General Engineering	A	6,124	5,910
Landscaping	C-27	5,768	5,467
Flooring & Floor Covering	C-15	3,443	3,244
Ceramic & Mosaic Tile	C-54	3,162	2,997
Roofing	C-39	2,836	2,696
Low Voltage Systems	C-7	2,591	2,467
Concrete	C-8	2,565	2,409
Cabinet, Millwork & Finish Carpentry	C-6	2,361	2,224
Swimming Pool	C-53	1,895	1,804
Drywall	C-9	1,657	1,587
Glazing	C-17	1,643	1,576
Doors, Gates & Activating Devices	D-28	1,611	1,532
Tree Service	D-49	1,165	1,087
Masonry	C-29	1,149	1,088
Fire Protection	C-16	1,133	1,099
Earthwork & Paving	C-12	1,090	1,056
Synthetic Products	D-12	1,081	1,029
Building Moving & Demolition	C-21	1,049	1,000
Lathing & Plastering	C-35	950	907
Pool & Spa Maintenance	D-35	880	852
Residential Remodeling	B-2	874	829
Refrigeration	C-38	848	806
Window Coverings	D-52	840	796
Concrete-Related Services	D-06	835	790
HAZ	HAZ	830	808
Structural Steel	C-51	787	739
Fencing	C-13	761	721
Prefabricated Equipment	D-34	644	611
Ornamental Metal	C-23	609	579
Sign	C-45	540	517
Solar	C-46	530	502
Framing & Rough Carpentry	C-5	515	485
Sheet Metal	C-43	493	471
Construction Clean-up	D-63	489	460
Insulation & Acoustical	C-2	475	462
Sanitation System	C-42	427	416
ASB	ASB	407	394
Welding	C-60	395	377
Non-specialized	D-64	383	366
Metal Products	D-24	378	366
Awnings	D-03	331	315
Machinery & Pumps	D-21	327	316
Pipeline	C-34	254	250
Sand & Water Blasting	D-38	236	225
Parking & Highway Improvement	C-32	213	203
Tree & Palm	C-49	213	200
Boiler, Hot Water & Steam	C-4	208	199
Non-Electrical Sign Installation	D-42	207	201
General Manufactured Housing	C-47	198	192
Construction Zone Traffic Control	C-31	193	189
Asbestos Abatement	C-22	185	182
Lock & Security Equipment	C-28	170	167
Reinforcing Steel	C-50	167	161
Well Drilling	C-57	164	157
Scaffolding	D-39	147	140
Water Conditioning	C-55	136	133
Hardware, Locks & Safes	D-16	130	123
Elevator	C-11	128	123
Siding & Decking	D-41	117	114
Paperhanging	D-29	101	97
Service Station Equipment & Maintenance	D-40	83	79
Trenching Only	D-56	79	75
Suspended Ceilings	D-50	74	72
Air & Water Balancing	D-62	64	62
Drilling, Blasting & Oil Field Work	D-09	49	47
Weatherization & Energy Conservation	D-65	42	38
Pole Installation & Maintenance	D-31	40	39
Pile Driving & Pressure Foundation Jacking	D-30	34	33
Central Vacuum Systems	D-04	30	28
D51	D-51	26	25

Trades with at least 25 licenses. What each class means.

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