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Contractor LookoutCalifornia

Licensed General Contractors in Castro Valley, California

Updated November 1, 2026 from CSLB's public license file · B General Building Contractor

  • 243licensed general contractors
  • 238active (Clear)
  • 2.1%with a suspension
  • 64.6%workers' comp exempt
  • 17.3 yrsmedian time licensed
  • 38.3%corp / LLC / partnership (61.7% sole owner)
  • 13new in the last 12 months
  • —change tracking began November 1, 2026

Castro Valley is home to 243 general contractors in CSLB's license file, ranking #7 of 16 Alameda County cities for this trade. 97.9% are Clear.

64.6% report a workers' comp exemption, 6.9 points higher than the statewide figure for general contractors (57.7%), so many of these businesses say they have no employees. The share with a suspension, 2.1%, is 2.1 points lower than the Alameda County rate for the same license (4.2%).

The median general contractor here has held a license for 17.3 years (more than the statewide median of 15.3), and 13 licenses were issued in the last 12 months.

General contractors hold CSLB's B (General Building Contractor) license, which covers projects that combine two or more unrelated trades. See the B General Building Contractor guide for what the license covers.

How to check a general contractor's license in Castro Valley

  1. Open the general contractor's profile from the table below (or search Castro Valley listings by name). Check that B appears among its classifications and that the primary status reads Clear. What B covers.
  2. Before any money changes hands, verify the license on CSLB's own lookup. Our data comes from CSLB's weekly file, so a very recent change may not show here yet.
  3. Ask for the pocket license and a photo ID and match the name to your contract. Work of $1,000 or more needs a license (the $1,000 rule), and a down payment can't exceed $1,000 or 10% (down payment rules).

50 of 243 general contractors in Castro Valley

Castro Valley general contractors sorted with Clear licenses first, then by years licensed. Badges reflect CSLB's file dated November 1, 2026, not a rating of anyone's work.

Licensed general contractors in Castro Valley
Business nameLicense #StatusYearsWorkers' compBond
Knuppe H James 214462 Clear 63 Insured On file
Paragon Electric 261291 Clear 56 Exempt On file
Northup Construction INC 265315 Clear 56 Insured On file
Langon John J JR 283657 Clear 53 Insured On file
Croll Edwin T 368028 Clear 47 Exempt On file
Olson Jack D Design & Construction CO 374770 Clear 47 Exempt On file
Reed's Craftmanship 394444 Clear 46 Exempt On file
M W C & Associates 398440 Clear 45 Exempt On file
Mc Donagh John Builders and Energy Systems 422946 Clear 44 Exempt On file
Rose Ken A 423722 Clear 44 Exempt On file
Direct Sales Floors 424404 Clear 44 Insured On file
Phillips Construction 442048 Clear 43 Insured On file
Radovich Pete Construction 449887 Clear 42 Exempt On file
M B R 457961 Clear 42 Exempt On file
Merkouris Construction INC 464532 Clear 42 Insured On file
Bar In the Woods Construction 469701 Clear 41 Exempt On file
Donahue Backhoe & Construction CO 504109 Clear 39 Exempt On file
Huska Kelly Contracting 506830 Clear 39 Insured On file
Deen Robert Construction 513685 Clear 39 Exempt On file
R J H Construction 517983 Clear 39 Exempt On file
Blackstone S R Construction INC 520142 Clear 39 Exempt On file
Olson Cliff Construction 529277 Clear 38 Exempt On file
Silva James P Construction INC 530036 Clear 38 Insured On file
Syufy Builders 530377 Clear 38 Insured On file
Jensen John 547028 Clear 38 Exempt On file
Nice Ralph J 549951 Clear 37 Exempt On file
Chi Construction Company 552583 Clear 37 Exempt On file
Complete Const CO 557164 Clear 37 Insured On file
Slb Construction INC 575742 Clear 37 Insured On file
Grandeur Construction INC 596556 Clear 36 Exempt On file
Pro-Tech Maintenance & Repair 596933 Clear 36 Insured On file
Woodberry Development Company 600258 Clear 36 Exempt On file
J V C Construction 604531 Clear 36 Exempt On file
Morrison B A 603913 Clear 36 Insured On file
Ric Kitchen + Bath Showroom 602812 Clear 36 Insured On file
Welch Construction 605159 Clear 36 Exempt On file
Hemenez Mark A General Contractor 614891 Clear 35 Exempt On file
Varasteh Construction 616876 Clear 35 Exempt On file
H I S Home Improvement Service 623902 Clear 35 Exempt On file
Young Wilson 623819 Clear 35 Exempt On file
Westeren Construction LLC 631458 Clear 35 Insured On file
Drabec Nicholas 639451 Clear 34 Exempt On file
Sun Kee Construction 639436 Clear 34 Exempt On file
East Bay Construction 650791 Clear 34 Insured On file
R S V P Development & Construction 660902 Clear 33 Exempt On file
Anykind Construction 677394 Clear 33 Exempt On file
Karajen Construction Services 676791 Clear 33 Exempt On file
Punjab Construction 689179 Clear 32 Insured On file
Schantz Mark 689172 Clear 32 Exempt On file
Wing's Roofing INC 698113 Clear 32 Insured On file

See all 243 general contractors in Castro Valley

Source: CSLB public data · Updated November 1, 2026 Status can change at any time. Verify on CSLB's Instant License Check.

Frequently asked questions

How many licensed general contractors are in Castro Valley?

CSLB's current public file lists 243 general contractors with a Castro Valley mailing address. 238 have a Clear status, and 87.7% show no issues at all in the file (no suspension, no pending action, bond on file, not near expiration).

What license does a general contractor need in California?

General contractors hold CSLB's B (General Building Contractor) license, which covers projects that combine two or more unrelated trades. Any job of $1,000 or more in labor and materials needs a licensed contractor. Read our guide to the $1,000 rule.

How do I check a general contractor's workers' comp?

Each profile shows the workers' comp type, insurer and policy dates from CSLB's file. Among Castro Valley general contractors, 64.6% are exempt (no employees), 35% insured and 0.4% without current coverage. Verify a policy with CSLB's insurer search (step by step).

Related

General Contractors in nearby cities

More general contractors lists in Alameda County

Other licensed trades in Castro Valley

Guides