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Commercial general contractors in San Mateo County, CA

2,038 active B licenses are based in San Mateo County, per CSLB records dated Oct 16, 2026. We have no permit data for San Mateo County yet.

Checked Oct 18, 2026 Verify live on CSLB

25 San Mateo County GCs

1

Huettig & Schromm Inc

Based in Menlo Park

workers’ comp insured · licensed 74 yrs

Active · B · #129060 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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2

Jeffrey R Tucker Const

Based in San Carlos

workers’ comp insured · licensed 71 yrs

Active · B · #151516 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

Workers' comp policy ends Nov 27, 2026. Ask for the renewal certificate.

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3

Rudolph & Sletten Inc

Based in Menlo Park

workers’ comp insured · licensed 65 yrs

Active · B · #198069 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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7

Les Kelley Inc

Based in Belmont

workers’ comp insured · licensed 58 yrs

Active · B · #252313 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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9

William O'Brien & Sons

Based in Burlingame

workers’ comp insured · licensed 52 yrs

Active · B · #292934 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

Workers' comp policy ends Nov 28, 2026. Ask for the renewal certificate.

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Show 15 more
15

Fred Thayer Carpets

Based in Daly City

workers’ comp insured · licensed 49 yrs

Active · B · #334324 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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24

K N Properties

Legal name: Keet Nerhan · Based in Half Moon Bay

workers’ comp insured · licensed 47 yrs

Active · B · #373390 · Bond ✓ · Workers' comp ✓ · Verify on CSLB

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Other classes on these cards: A = General Engineering, C-8 = Concrete, C-9 = Drywall, C-12 = Earthwork and Paving, C-13 = Fencing, C-15 = Flooring and Floor Covering, C-27 = Landscaping.

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

2,384 active B licenses are based in San Mateo County in the CSLB file dated Oct 16, 2026, and 1,061 of them carry a workers' comp policy. Fire review here depends on the address, because the county has many fire departments with their own requirements, so find your fire marshal on San Mateo County Fire's jurisdiction map before plans go in (San Mateo County Fire, checked Oct 18, 2026).

Commercial permit notes for San Mateo County

Permit office: County of San Mateo Planning and Building Department, Building Inspection Section

A commercial or office permit in unincorporated San Mateo County needs three sets of plans with signed calculations and the locations of hydrants, standpipes, sprinklers and utilities. Fees cover building, plan check, health and planning.

Source: County of San Mateo, Planning and Building Department, checked Oct 18, 2026

Fire review depends on the address: the county has many fire departments, each with its own requirements, so check San Mateo County Fire's jurisdiction map to find the right fire marshal.

Source: County of San Mateo, San Mateo County Fire, checked Oct 18, 2026

San Mateo County Environmental Health must approve plans before any food facility is built or remodeled. Submit 3 sets of plans and the equipment cut sheets through MyEHS; review takes up to 20 business days and the first revision is free.

Source: San Mateo County Health, Environmental Health Services, checked Oct 18, 2026

A conditionally permitted use needs a Use Permit decided at a public hearing, with notice to owners within 300 feet. The County estimates 4 to 6 months and $7,700 to $14,000.

Source: County of San Mateo, Planning and Building Department, checked Oct 18, 2026

Commercial plans are referred to Planning, Public Works, Fire, Civil/Drainage and Geotechnical, which generally respond within 30 days. The space can't be occupied until it passes a final inspection.

Source: County of San Mateo, Planning and Building Department, checked Oct 18, 2026

Questions about hiring a commercial GC in San Mateo County

How many commercial general contractors are in San Mateo County?

2,038 active B licenses list San Mateo County as the business location in CSLB records dated Oct 16, 2026. We don't have permit data for San Mateo 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 San Mateo County.

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