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General contractors in Contra Costa County, CA

2,840 eligible B and B-2 licenses based in Contra Costa County, per CSLB records dated Oct 16, 2026.

Checked Oct 18, 2026 Verify live on CSLB

25 of 2,840 Contra Costa County GCs

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

Bid requests come to GC Bay Area first, not straight to the contractor.

5

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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6

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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9

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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12

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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13

Kasten Builders

Based in Richmond

workers’ comp insured · licensed 48 yrs

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

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15

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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18

Doyle Heaton

Based in Pleasant Hill

workers’ comp insured · licensed 46 yrs

Active · B · #386387 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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23

Richard B Moore

Based in Danville

workers’ comp insured · licensed 45 yrs

Active · B · #398523 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

Workers' comp policy ends Nov 1, 2026. Ask for the renewal certificate.

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24

Baja Construction Co Inc

Based in Martinez

workers’ comp insured · licensed 45 yrs

Active · B · #412390 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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Business build-out? See commercial GCs in Contra Costa County

3,476 active B and B-2 licenses are based in Contra Costa County in the CSLB file dated Oct 16, 2026, and 1,475 of them carry a workers' comp policy. The County issues building permits for unincorporated areas and also for Clayton, Hercules, Lafayette, Moraga and Orinda; Walnut Creek and the other cities run their own building departments (Contra Costa County Conservation and Development, checked Oct 18, 2026).

Already have a contractor's name or license number?

Check it against the same CSLB data.

Searches active and lapsed Bay Area B and B-2 licenses. Other classes: search on CSLB.

Before you hire in Contra Costa County

Building permits in Contra Costa County go through Contra Costa County Department of Conservation and Development, Building Inspection.

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

The County does planning review only for unincorporated Contra Costa, but it also issues building permits for Clayton, Hercules, Lafayette, Moraga and Orinda. Walnut Creek and the other cities run their own building departments; the CCMAP tool shows which applies to your address.

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

Almost every project needs a County permit, including electrical panel upgrades, pergolas, outdoor kitchens and retaining walls of 3 ft or more. Planning approval comes first for a new ADU or any change to a building's size, height or exterior.

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

Building, Planning and Public Works applications are filed 100% digitally through the ePermits Center; paper is no longer accepted.

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

The completeness check takes about 4 to 5 business days. Larger projects then pay a plan check fee, and review starts once payment is confirmed.

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

Owner-builders, including a trust or corporation, can pull County permits by filing a Building Permit Declaration form, and may need to show proof of ownership.

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

B or B-2: which license fits your job

Both classes can act as your prime contractor. A B-2 is limited to remodels of an existing wood-frame house. If your plan changes the structure, look for a B.

JobB General BuildingB-2 Residential Remodeling
Kitchen or bath remodel in an existing houseYesYes, when the contract covers 3 or more unrelated trades
Addition or new roomsYesNo
Moving or removing a load-bearing wallYesNo
New homeYesNo
Commercial or tenant workYesNo

Sources: CSLB, class B and class B-2, checked Oct 18, 2026. More in B vs B-2.

California rules for your contract

A down payment on a home improvement contract can't be more than $1,000 or 10% of the price, whichever is less. No progress payment can be more than the work done or materials delivered.

Source: California B&P Code 7159.5, checked Oct 18, 2026

Work under $1,000 in total (labor and materials) that needs no building permit doesn't require a license. The exemption doesn't apply if the person advertises as a contractor, has employees, or splits a job to stay under the limit.

Source: California B&P Code 7048, checked Oct 18, 2026

Every licensed contractor must keep a $25,000 contractor's bond on file with CSLB. That has been the amount since January 1, 2023.

Source: CSLB, bond requirements, checked Oct 18, 2026

A contractor with employees must carry workers' comp. Until 2028, a B contractor with no employees can legally file an exemption, so check which one yours did. From January 1, 2028, a workers' comp certificate is required for every license.

Source: CSLB, workers' compensation, checked Oct 18, 2026

Complaint history isn't in CSLB's free data files, so we don't show it. Check complaints on CSLB before you sign.

Questions about hiring in Contra Costa County

How many licensed general contractors are based in Contra Costa County?

3,476 active B and B-2 licenses list Contra Costa County as the business city in CSLB's records dated Oct 16, 2026. We list 2,840 of them; the other 636 have no bond on file or hold a specialty-trade license. Each card's "Verify on CSLB" link opens that license's live record.

Which license does a home remodel need?

A B (General Building) license can take a prime contract that involves two or more unrelated trades other than framing or carpentry. A B-2 (Residential Remodeling) license covers remodels of an existing wood-frame house with three or more unrelated trades, and it can't be used for additions, structural work or new homes.

How much can a contractor ask for as a down payment?

In California, a down payment on a home improvement contract is capped at $1,000 or 10% of the contract price, whichever is less.

Do I need a licensed contractor for a small job?

Work under $1,000 in total that needs no building permit is exempt from licensing. The exemption doesn't apply to someone who advertises as a contractor, has employees, or splits a job to stay under the limit.

What does "exempt" mean under workers' comp on a card?

The contractor told CSLB it has no employees. Until January 1, 2028, a B contractor with no employees can legally file that exemption. Ask whether anyone besides the owner will work on your property.

Where do I get a building permit in Contra Costa County?

Permits are handled by Contra Costa County Department of Conservation and Development, Building Inspection; the link is in "Before you hire" above. Ask your contractor who will pull the permit and have it in the contract.

General contractors near Contra Costa County

Other project types in Contra Costa County

How this list is built

License class, status, dates, bond and workers' comp come from the California Contractors State License Board's public data files. The Master file is dated Oct 16, 2026, the workers' comp file Oct 17, 2026, and we processed them on Oct 18, 2026. Of 3,476 active licenses in Contra Costa County, 636 are left out: no bond on file, or a specialty-trade license. Each card's "Verify on CSLB" link opens that license's live record. Read the full method. Related: how to verify a license, bond and insurance, complaints.

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