Er5 Construction INC
- 3245 Canary Ct, Ontario, CA 91761
- (909) 815-9746
- October 2, 2026
Based in Indian Wells, Riverside County, Cornerstone Construction & Development INC holds California contractor license #1159349, classified B (General Building). The license was active and clear when this listing was compiled.
This classification covers projects that cross trade lines — additions, second stories, ADUs, structural alterations, whole-house renovations and post-loss reconstruction. A general contractor can perform or subcontract the individual trades, but the permit and the schedule sit with them.
Working in the Coachella Valley: Blowing sand and long periods of intense sun are hard on exterior finishes, seals and mechanical equipment, and they shorten maintenance intervals noticeably.
Before you hire any general contractor: Ask who is actually pulling the permit. If a contractor asks the homeowner to pull an owner-builder permit on a job this size, the homeowner takes on the liability, and that is a reason to slow down rather than sign.
License status can change at any time. Confirm license #1159349 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 — Cornerstone Construction & Development INC 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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