Best Licensed General Contractors in Castro Valley, CA
204 general contractors registered in Castro Valley hold current CSLB licenses, verified against official records as of August 22, 2026. The 8 below are the top-ranked, ordered by workers' compensation cover and years licensed.
- 3,239 active B general building contractor licenses in Alameda County; 209 registered in Castro Valley
- 71 of Castro Valley's 209 licenses (34.0%) carry current workers' compensation cover, not liability insurance; a blank usually means an owner-operator with no employees
- Median time licensed in Castro Valley: 16 years
- Longest Castro Valley licensure: since 1970
- 250 county licenses reach their expiration date within 90 days
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- Verified
- August 22, 2026
- Licensed since
- 1970
- Phone
- (510) 368-4180
- Verified
- August 22, 2026
- Licensed since
- 1982
- Phone
- (510) 538-5000
- Verified
- August 22, 2026
- Licensed since
- 1983
- Phone
- (510) 886-2378
- Verified
- August 22, 2026
- Licensed since
- 1984
- Phone
- (650) 740-0054
- Verified
- August 22, 2026
- Licensed since
- 1987
- Phone
- (510) 917-5699
- Verified
- August 22, 2026
- Licensed since
- 1988
- Phone
- (510) 755-3008
- Verified
- August 22, 2026
- Licensed since
- 1988
- Phone
- (650) 591-9800
- Verified
- August 22, 2026
- Licensed since
- 1989
- Phone
- (510) 427-4722
Compare the top 6 at a glance
| Company | License | Workers' comp | Licensed since |
|---|---|---|---|
| Northup Construction Inc. | #265315 | On file | 1970 |
| Direct Sales Floors | #424404 | On file | 1982 |
| Steven L Phillips Construction Inc. DBA Phillips Construction | #442048 | On file | 1983 |
| Merkouris Construction Inc. | #464532 | On file | 1984 |
| Kelly Huska Contracting | #506830 | On file | 1987 |
| Silva James P Construction Inc. | #530036 | On file | 1988 |
Alameda County general building licensure at a glance
California licenses contractors by classification and CSLB publishes one on every record, so supply can be counted exactly: 3,239 active B general building contractor licenses in Alameda County, 209 of them registered in Castro Valley. CSLB also publishes a real original issue date, which Washington's registry does not, so tenure is measurable here: the median Castro Valley license has been held 16 years, and the longest-standing one dates to 1970. 71 of Castro Valley's 209 licenses (34.0%) carry current workers' compensation cover in CSLB's file. That is employee injury cover, not liability insurance, and a blank usually means an owner-operator with no employees - lawful, and not a mark against anyone. The contractor bond is not a signal here: 3,237 of the county's 3,239 licenses carry the same $25,000 bond California sets by statute. 250 county licenses reach their expiration date within the next 90 days. CSLB cannot link straight to a license record, so every listing above shows its number for you to type into CSLB's license lookup. How we verify.
General Contractors in Castro Valley: common questions
How many licensed general contractors are there in Castro Valley?
209 active B general building contractor licenses are registered in Castro Valley, out of 3,239 across Alameda County. 204 Castro Valley-registered companies passed our license verification, and the 8 on this page are the top-ranked of those. Only licenses CSLB shows as CLEAR and unexpired are listed.
Does California license general contractors?
Yes. California licenses contractors by classification, and B is the CSLB classification that authorises this work. 209 active B general building contractor licenses are registered in Castro Valley and 3,239 across Alameda County, the longest-standing issued in 1970. Only CLEAR, unexpired licenses appear here.
How do I check a general contractor's license in California?
Every listing above shows its CSLB license number. CSLB cannot link straight to a record, so open its license lookup and type the number in: it shows status, expiration, the contractor bond and workers' compensation cover, which 71 of Castro Valley's 209 currently carry. 250 Alameda County licenses expire within 90 days.
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