H & R Underground
Verified against CSLB on · View on CSLB
License details
- License number
- 878364
- Classifications
- License term on file
- May 24, 2006 – April 30, 2028
Business
- (510) 222 5556 (CSLB public record)
- 4221 APPIAN WAY, El Sobrante, CA 94803Contra Costa County
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What to check next
Frequently asked questions
Is H & R Underground licensed in California?
Yes. H & R Underground holds an active California state contractor license (CSLB #878364), verified against the CSLB public record on June 17, 2026.
What is H & R Underground's CSLB license number?
H & R Underground's California contractor license number is 878364. Look that number up with the CSLB "Check a License" tool to confirm its current status against the public record yourself.
What kind of work is H & R Underground licensed for?
H & R Underground is classified under Plumbing (C-36) and Sanitation System (C-42) by the CSLB.
How do I verify H & R Underground's license myself?
Look up license #878364 with the CSLB "Check a License" tool and compare the status, bond, and workers' compensation details against what's shown on this page. This page reflects the CSLB public record as of June 17, 2026.
Verify it yourself: How to verify a California contractor license · Look up #878364 on CSLB
See an error in this record? Report incorrect information. Status reflects CSLB data as of the date shown above.