Alta Loma Plumbing
- 10722 Arrow Rte #812, Rancho Cucamonga, CA 91730
- (909) 944-6637
- September 15, 2026
Penn Larry is a licensed California contractor based in Twentynine Palms, San Bernardino County, holding CSLB license #423426 under classification A — General Engineering, B General Building, C36 Plumbing. The license was active and clear when this listing was compiled.
Plumbing contractors hold the C-36 classification, covering repipes, drain and sewer work, gas piping and water heater installation.
Working in the Morongo Basin: The high desert around Twentynine Palms combines intense sun, sharp temperature swings and wind-driven grit — a hard environment for exterior work.
Before you hire any plumbing contractor: On a water heater replacement, confirm seismic strapping, the expansion tank and the venting are all included. Those are code requirements, not upsells.
License status can change at any time. Confirm license #423426 is current, and check bond and workers’ compensation coverage, using the CSLB license lookup before signing a contract or paying a deposit.
This profile was compiled from California State License Board public records and is unclaimed — Penn Larry has not added its own details. Are you the owner? Claim this listing to add photos, services and a description of your work, or contact us to have it removed.
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