Cornerstone Construction
- 22650 Deprad, Perris, CA 92570
- (951) 940-4272
- September 20, 2026
Based in White Water, Riverside County, Windmill Excavating & Construction holds California contractor license #939586, classified A (General Engineering, 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 San Gorgonio Pass: Growth here has been fast, so the housing stock runs from older ranch properties to tracts finished in the last few years, and the two need different approaches.
Before you hire any general contractor: On a project of any size, ask for the payment schedule in writing before work starts. California caps the down payment on home improvement contracts at $1,000 or 10% of the contract price, whichever is less — progress payments after that should track completed work, not the calendar.
License status can change at any time. Confirm license #939586 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 — Windmill Excavating & Construction 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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