Concrete companies in San Diego: 492 C-8 licenses, 228 payroll locations and how to read a license record

This report is for San Diego County homeowners, builders and property managers hiring a concrete contractor or choosing a supplier, and for B2B sellers whose customers are concrete firms: insurers, bonding agents, equipment dealers, admixture suppliers and software vendors.

The license file is the best list

The Contractors State License Board publishes its licensees by classification and county. We downloaded every active C-8 (Concrete) license with a San Diego County address on 30 October 2026:

By city, San Diego has 104, Escondido 57, El Cajon 37, Vista 33 and Chula Vista 31. The C-8 class covers contractors who form, pour, place, finish and install mass, pavement, flat and other concrete work, including setting screeds. It doesn't cover firms whose only business is plaster coatings or placing rebar.

The Census count, and why it's smaller

Census figures for the San Diego-Chula Vista-Carlsbad, CA Metro Area (CBSA 41740), which is San Diego County, combining NAICS 238110 (Poured Concrete Foundation and Structure Contractors) and NAICS 327320 (Ready-Mix Concrete Manufacturing). Source: US Census Bureau, County Business Patterns 2023.

The contractor figure for 250 or more is the total less the published classes; four ready-mix establishments sit in classes the Census Bureau doesn't publish.

Why 492 licenses but 207 contractor establishments? County Business Patterns counts locations with paid employees, filed under their main activity. A sole owner without payroll isn't counted, and a firm holding B and C-8 licenses that mostly builds houses is counted as a homebuilder or general contractor. The license file is the wider list; the Census figure is the core of firms whose main business is concrete.

How to read a license record

California's rule is simple: a license is needed for any job of $1,000 or more in combined labor and materials, any job needing a building permit, and any job using employees.

Worked example: the license check before a driveway

Illustrative example. The firms and figures are invented.

A Chula Vista homeowner has three bids to replace a 600 square foot driveway.

Bid B is a $7,200 job by an unlicensed contractor, seven times the $1,000 threshold. Bid C's license says exempt, so the five-person crew is either family, subcontractors or uninsured employees; ask which before you sign. Bid A is the only one whose paperwork matches what you saw.

The plants

Twenty-one ready-mix establishments serve the county, 9 of them with 20 to 49 employees. None of the SEC-registered listed concrete companies is based in San Diego County. Vulcan Materials, whose top revenue state in 2025 was California, sold its California ready-mixed concrete operations in the second quarter of 2026 (with its Virgin Islands business, for $722.1 million combined) and kept its California aggregates and asphalt operations, its quarterly report says. If a supplier's name has changed on your delivery tickets this year, that's likely why.

Selling to San Diego concrete firms

The license file is a prospect list with fields most databases don't have: classification, business type, surety and workers' comp carrier, and policy expiration dates. In this file, between 23 and 56 C-8 holders' workers' comp policies expire in each month from November 2026 to October 2027, so an insurance seller can time outreach to each renewal. Equipment sellers can split by classification: C-8 only firms do flatwork and foundations; A and C-8 firms do site and paving work. For turning the license file into a target list, see how to build a prospect list. Bebop can find concrete contractors that match a description and research each one.

Illustrative example. A workers' comp broker (pacificcomp.example) contacts each C-8 holder with an insurer-written policy 60 days before it expires: about 40 businesses a month. At a 10% reply rate and one in three quoted accounts won, that's about one new account a month; at $14,000 in premium each, that's $168,000 a year in premium.

Subject: Your workers' comp renews in [month]

Hi [first name],

The state license file shows [Company]'s workers' comp policy renewing in [month]. Rates move at every renewal, so it's worth a second quote.

We place comp for C-8 contractors across the county and can usually quote from your current policy and payroll in two days.

Want me to run one?

[Your name]

Local sources

Next step: for the general contractors and homebuilders these firms work for, read the report on construction companies in San Diego.