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Williams Underground Construction INC: CSLB License #787857
Source: CSLB public data · Updated November 1, 2026 · CSLB's record
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The license is active with no suspension on record, though classifications, bonds and secondary flags still deserve a look.
License details
- License number
- 787857
- Primary status
- CLEAR · what this means
- Business type
- Corporation
- Issued
- November 28, 2000 (25 years)
- Reissued
- October 21, 2016
- Expires
- October 31, 2028
- Classifications
- C-36 Plumbing Contractor
C-42 Sanitation System Contractor - Mailing address
- 7063 Saroni Drive, Oakland, CA, 94611
- Phone
- (925) 837-6766
Workers' compensation
- Type
- Workers' Compensation Insurance
- Insurer
- Hartford Casualty Insurance Company
- Policy number
- 76WEGAK0BU0
- Effective
- January 24, 2023
- Expires
- January 24, 2027
Confirm coverage with CSLB's insurer search. How to check workers' comp.
Contractor's bond
- Surety
- American Contractors Indemnity Company
- Bond number
- 100326962
- Amount
- $25,000
- Effective
- January 1, 2023
Bond of qualifying individual
CSLB's public file lists no qualifier bond for this license. One isn't required when the qualifier owns at least 10% of the business, and some qualifier bonds appear only on CSLB's record.
Status history
No changes recorded since we began tracking this license on November 1, 2026. We compare every weekly CSLB file and log changes to status, bonds, workers' comp and classifications here.
Related
- Licensed plumbers in Oakland
- Licensed septic and sanitation contractors in Oakland
- Licensed contractors in Oakland
- Contractors in Alameda County
- What "CLEAR" means
- How to check a contractor license
Data: CSLB Public Data Portal, file dated November 1, 2026. Status can change at any time. Verify on CSLB's Instant License Check. This site is not a consumer reporting agency under the FCRA; don't use it for employment, credit, insurance or housing decisions about an individual.