CORNER KEYSTONE CONSTRUCTION CORP
California contractor license #992459 · Covina, Los Angeles County
License
- License number
- 992459
- Status
- Clear
- Classifications
- B General Building Contractor
- C-33 Painting and Decorating Contractor
- Business type
- Corporation
- Issued
- Apr 28, 2014
- Expires
- Apr 30, 2028
- Workers' compensation
- Workers' Compensation Insurance — Benchmark Insurance Company
- Contractor's bond
- $25,000 — American Contractors Indemnity Company
- DIR public works registration
- Registered through Jun 30, 2028
From the California Contractors State License Board (CSLB) public license file, last updated May 13, 2026. Verify license #992459 on CSLB's License Check.
California public works
CORNER KEYSTONE CONSTRUCTION CORP appears on 13 public works projects registered with the California Department of Industrial Relations, 12 of them as the prime contractor, for 10 awarding bodies between 2023 and 2026. Projects it led total $10,973,630 in reported contract value.
| Date | Project | Awarding body | Role | Contract amount |
|---|---|---|---|---|
| Aug 26, 2026 | Corner Keystone PCA A2026-110Storm drain & flood control | City of Chino Hills | Prime | $74,400 |
| Jul 20, 2026 | Corner Keystone PCA A2026-098Solar, EV & energy | City of Chino Hills | Prime | $49,777 |
| Jun 30, 2026 | Del Aire Soccer Field Posts & NettingParks, landscape & fields | Wiseburn Unified School District | Prime | $73,777 |
| Jun 16, 2026 | CORNER KEYSTONE 2627-34Plumbing & restrooms | Placentia Yorba Linda Unified School District | Prime | $550,070 |
| Sep 9, 2025 | SGMS & MVMS PortablesPlumbing & restrooms | Beaumont Unified School District | Prime | $3,934,470 |
| Apr 21, 2025 | CONCRETE REPAIR - VPHSParks, landscape & fields | Orange Unified School District | Prime | $56,777 |
| Apr 10, 2025 | Baseball Field ImprovementParks, landscape & fields | Wiseburn Unified School District | Prime | $1,277,079 |
| Apr 10, 2025 | Baseball Field ImprovementsParks, landscape & fields | Wiseburn Unified School District | Prime | $1,277,079 |
| Apr 9, 2025 | 24-25-004 Baseball Field UpgradesParks, landscape & fields | Rialto Unified School District - Purchasing Services | Prime | $2,747,470 |
| Aug 13, 2024 | Siminski Park Improvement ProjectParks, landscape & fields | City of Inglewood - Public Works | Prime | $320,000 |
| May 20, 2024 | Jonas Salk Outdoor EnvironmentsBuildings & facilities | Los Angeles County Office of Education | Subcontractor | — |
| May 2, 2023 | PO 725527Buildings & facilities | San Bernardino City USD - Purchasing | Prime | $15,000 |
| — | Villa Parke-Locker Room ADA ImprovementsOther | City of Pasadena, CA | Prime | $597,730 |
Most recent 13 of 13. Contract amounts are the whole project's, as the awarding body reported them to DIR (reported since July 2024); a role is "Prime" when the awarding body registered the contractor on the project.
Awarding bodies it works for most
- Wiseburn Unified School District · 3 projects
- City of Chino Hills · 2 projects
- San Bernardino City USD - Purchasing · 1 project
- Orange Unified School District · 1 project
- Beaumont Unified School District · 1 project
- Los Angeles County Office of Education · 1 project
- Rialto Unified School District - Purchasing Services · 1 project
- City of Pasadena, CA · 1 project
- Placentia Yorba Linda Unified School District · 1 project
- City of Inglewood - Public Works · 1 project
Is this your business?
Claim it on Atriam to add your work photos, service area and a booking link, and to run calls, leads, estimates and invoices in one place — free.
Claim this business