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California · CSLB public records

Concrete contractors in Contra Costa County

141 California-based C-8 concrete contractors in our current export report a business location in Contra Costa County. Start with a city below or review the county listings. Check the current CSLB license record and ask about the specific work before hiring.

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Before you compare quotes in Contra Costa County

Records checked 2026-10-06. Listings include the C-8 classification, source status CLEAR and an unexpired license at import. They do not establish workmanship, customer reviews, current availability or participation in our referral service. Confirm each record with CSLB's license checker.

County counts use the county reported in the CSLB business record. A business can work outside its mailing city or county; ask whether your address is covered. We do not publish exact business addresses, phone numbers or personnel records.

Cities in Contra Costa County

Contractors based in Contra Costa County

CONCO

Concord, CA · CSLB #199902

C-8 Concrete · Status: CLEAR in the source export

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MERCOZA

Walnut Creek, CA · CSLB #988861

C-8 Concrete · Status: CLEAR in the source export

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Match the contractor to the work

A driveway replacement, decorative patio and structural slab need different project briefs. Send photos, dimensions, intended use and access constraints. Ask bidders to separate demolition, disposal, base preparation, drainage, finish and curing protection. Confirm who handles permit questions with the authority for the property.

The C-8 classification identifies concrete work in the license record. It does not tell you whether a business takes small residential repairs or has experience with your chosen finish. Request comparable completed work and a written scope.

Compare the complete quote

Use the same project description for each bidder in Contra Costa County. Include changes in elevation, water pooling, access for deliveries and anything that must stay usable during construction. Ask which assumptions could change the price and how changes are approved.

Our cost guides describe national estimates, not a California bid. Use the concrete calculator to check quantities once the dimensions and design are established.

Find the right contractor for your project

Compare the work, questions and quote details that matter for each type of job.

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How requests are handled

A listing is a public record, not confirmation that the business accepts referrals. We review your request and seek up to three suitable contractors. California records do not supply email addresses, so matching may require manual contact. Availability and a response are not guaranteed.

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Sources and coverage

CSLB classification export · Census geography · How records are checked. This is a selected C-8 directory, not every business legally able to undertake concrete work. Workers' compensation is not general liability insurance. Request current insurance details directly.