C-43 Sheet Metal Contractor license in California

Updated November 1, 2026 · Official name from CSLB's classification list

• 1,315licenses hold C-43
• 96.7%Clear (CA addresses)
• 19.9%workers' comp exempt (all: 49.6%)
• 99.9%contractor's bond on file
• 22.8 yrsmedian time licensed
• 72%businesses, not sole owners

Sheet metal contractors select, cut, shape, fabricate and install sheet metal. CSLB's list includes cornices, flashing, gutters, leaders (downspouts), pans, kitchen equipment, ductwork with its insulation, patented chimneys, metal flues and metal roofing systems.

A homeowner usually hires a C-43 for continuous gutters, custom flashing or new ducts. Ornamental metalwork is a different license, even when both involve metal.

Typical work under C-43

• One-piece continuous gutters and downspouts
• Roof and wall flashing
• Duct fabrication and installation
• Metal roofing systems
• Metal flues and factory-built chimneys
• Commercial kitchen hoods and equipment

Work that needs a different license

• Decorative iron railings: C-23 Ornamental Metal
• Furnace or AC equipment that the ducts connect to: C-20 HVAC
• Shingle or tile roofing: C-39 Roofing

Tips before hiring

• For gutters, ask about the gauge of metal and how hangers are spaced.
• For ductwork, ask whether joints will be sealed and the system leak-tested.
• Ask how downspouts will drain away from the foundation.
• Ask whether gutter guards are included in the price and how they change cleaning later.
• For kitchen hoods or flues, confirm clearances to wood and other combustible materials.

Where C-43 contractors are

The cities with the most C-43 license holders in CSLB's current file:

1. Sheet Metal Contractors in Sacramento: 32
2. Sheet Metal Contractors in Fresno: 28
3. Sheet Metal Contractors in Santa Rosa: 26
4. Sheet Metal Contractors in Los Angeles: 25
5. Sheet Metal Contractors in San Jose: 24
6. Sheet Metal Contractors in San Francisco: 23
7. Sheet Metal Contractors in Riverside: 21
8. Bakersfield: 19
9. El Cajon: 19
10. San Diego: 17

All sheet metal contractors lists

Cities with at least 20 C-43 license holders, largest first:

• Sacramento (32)
• Fresno (28)
• Santa Rosa (26)
• Los Angeles (25)
• San Jose (24)
• San Francisco (23)
• Riverside (21)

How to verify a C-43 license

1. Search the business or license number here and confirm C-43 is listed on the profile.
2. Check the same number on CSLB's Instant License Check.
3. Read our full guide to checking a contractor license.

Related license types

• C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor
• C-39 Roofing Contractor
• C-23 Ornamental Metal Contractor

Source: CSLB public data · Updated November 1, 2026 Status can change at any time. Verify on CSLB's Instant License Check.

More license types: ← C-42 Sanitation System Contractor · C-45 Sign Contractor →