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Commercial general contractors in Contra Costa County, CA

2,943 active B licenses are based in Contra Costa County, per CSLB records dated Oct 16, 2026. We have no permit data for Contra Costa County yet.

Checked Oct 18, 2026 Verify live on CSLB

25 Contra Costa County GCs

1

C Overaa & Co

Based in Richmond

workers’ comp insured · licensed 78 yrs

Active · B · #106793 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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3

Conco

Legal name: Gonsalves & Santucci Inc · Based in Concord

workers’ comp insured · licensed 65 yrs

Active · B · #199902 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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6

ANZA Engineering Corp

Based in Brentwood

workers’ comp insured · licensed 54 yrs

Active · B · #273213 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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10

Zovich Construction

Legal name: Zovich & Sons Inc · Based in Brentwood

workers’ comp insured · licensed 53 yrs

Active · B · #287113 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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Show 15 more
11

The Scholten Company

Based in Brentwood

workers’ comp insured · licensed 52 yrs

Active · B · #290024 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

Workers' comp policy ends Nov 8, 2026. Ask for the renewal certificate.

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12

Interactive Resources Inc

Based in Point Richmond

workers’ comp insured · licensed 52 yrs

Active · B · #290922 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

Workers' comp policy ends Oct 19, 2026. Ask for the renewal certificate.

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15

E Arias & Co

Based in Antioch

workers’ comp insured · licensed 50 yrs

Active · B · #314753 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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18

Robert J Freitas

Based in Brentwood

workers’ comp insured · licensed 48 yrs

Active · B · #354852 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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20

Kasten Builders

Based in Richmond

workers’ comp insured · licensed 48 yrs

Active · B · #362773 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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23

G N Henley Inc

Based in Clayton

workers’ comp insured · licensed 47 yrs

Active · B · #373161 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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24

Gayler Design Build Inc

Based in Danville

workers’ comp insured · licensed 46 yrs

Active · B · #384275 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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Other classes on these cards: A = General Engineering, C-2 = Insulation and Acoustical, C-6 = Cabinet, Millwork, Finish Carpentry, C-8 = Concrete, C-12 = Earthwork and Paving, C-15 = Flooring and Floor Covering, C-21 = Building Moving, Demolition, C-27 = Landscaping, C-33 = Painting and Decorating, C-50 = Reinforcing Steel, C-51 = Structural Steel, C-60 = Welding, D-06.

Sorted by workers' comp policy on file, then years licensed (we don't have permit data for Contra Costa County). Payment doesn't change the order. How we rank.

3,425 active B licenses are based in Contra Costa County in the CSLB file dated Oct 16, 2026, and 1,460 of them carry a workers' comp policy. Every commercial TI in the County's permit area needs sanitary district approval, even with no plumbing work, and every agency approval must be in hand before you submit to Building (Contra Costa County Conservation and Development, checked Oct 18, 2026).

Commercial permit notes for Contra Costa County

Permit office: Contra Costa County Department of Conservation and Development, Building Inspection

Every commercial tenant improvement in the County's permit area needs sanitary district approval, even with no plumbing work, and fire department approval is required for any commercial change of use. All agency approvals must be in hand before you submit to Building.

Source: Contra Costa County, Department of Conservation and Development, checked Oct 18, 2026

For a county business license in an unincorporated area, get zoning approval from Conservation and Development (925-655-2700) first and attach it to the application. If the use isn't allowed outright, it needs a discretionary Land Use Permit.

Source: Contra Costa County Treasurer-Tax Collector, checked Oct 18, 2026

Contra Costa Environmental Health reviews plans for any new or remodeled food facility, including a new hood or replaced floors, walls or ceilings. Initial review should take 20 business days, and you submit one set of plans to start and four for final approval.

Source: Contra Costa Health, Environmental Health, checked Oct 18, 2026

Under AB 671, in effect since Jan 1, 2026, Environmental Health should review resubmittals for restaurant tenant improvements within 10 business days. The rule doesn't cover new buildings or other food facility types.

Source: Contra Costa Health, Environmental Health, checked Oct 18, 2026

The Contra Costa County Fire Protection District's TI application requires sprinkler plans from a C-16 licensed contractor and fire alarm plans from a C-10, and kitchen hood suppression plans to meet UL300.

Source: Contra Costa County Fire Protection District, checked Oct 18, 2026

Questions about hiring a commercial GC in Contra Costa County

How many commercial general contractors are in Contra Costa County?

2,943 active B licenses list Contra Costa County as the business location in CSLB records dated Oct 16, 2026. We don't have permit data for Contra Costa County yet.

Which contractor license does a commercial build-out need?

A B (General Building) license. The B definition covers any structure for people or property and does not split homes from businesses. A B-2 license is limited to existing residential wood-frame buildings, so a B-2 contractor cannot take a store or office build-out. Fire sprinkler work needs a C-16 license or a licensed C-16 subcontractor (CSLB, B&P Code 7057).

Does a commercial contractor need workers' comp?

Any contractor with employees must carry workers' comp. A contractor with no employees can file an exemption, and a card marked exempt means the contractor told CSLB it has no employees. Ask who will work on your site. From January 1, 2028 California requires a workers' comp certificate for every license, with a narrow joint-venture exception (CSLB, checked Oct 18, 2026).

Commercial general contractors in other places

Counts are active B licenses with commercial permits where we have permit data (San Francisco, San Jose), otherwise active B licenses based there. CSLB Oct 16, 2026.

Who pays for a build-out, and what a TI allowance covers, is explained on tenant improvement contractors. Residential work is listed separately: general contractors in Contra Costa County.

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