PRIME MECHANICAL SERVICE INC
California contractor license #819114 · Livermore, Alameda County
License
- License number
- 819114
- Status
- Clear
- Classifications
- B General Building Contractor
- C-4 Boiler, Hot-Water Heating and Steam Fitting Contractor
- C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor
- C-36 Plumbing Contractor
- C-38 Refrigeration Contractor
- Business type
- Corporation
- Issued
- Apr 23, 2003
- Expires
- Jan 31, 2027
- Workers' compensation
- Leasing Firm, Temp Agency, Etc — Ace American Insurance Company
- Contractor's bond
- $25,000 — American Contractors Indemnity Company
- DIR public works registration
- Registered through Jun 30, 2027
From the California Contractors State License Board (CSLB) public license file, last updated Jul 27, 2026. Verify license #819114 on CSLB's License Check.
California public works
PRIME MECHANICAL SERVICE INC appears on 16 public works projects registered with the California Department of Industrial Relations, 13 of them as the prime contractor, for 8 awarding bodies between 2024 and 2026. Projects it led total $5,906,038 in reported contract value.
| Date | Project | Awarding body | Role | Contract amount |
|---|---|---|---|---|
| Aug 5, 2026 | HH270241 - Prime MechanicalHVAC & mechanical | Foothill-De Anza Community College District | Prime | $47,531 |
| Jul 30, 2026 | CSO HVAC Boiler ReplacementHVAC & mechanical | Central Contra Costa Sanitary District | Prime | $63,650 |
| Jul 23, 2026 | HVAC equipment service repairHVAC & mechanical | County of Alameda GSA-BMD | Prime | $97,788 |
| Jul 1, 2026 | HVAC MaintenanceHVAC & mechanical | Union Sanitary District | Prime | $45,369 |
| Oct 30, 2025 | HH260401 - Prime MechanicalHVAC & mechanical | Foothill-De Anza Community College District | Subcontractor | $20,924 |
| Sep 2, 2025 | HH261041HVAC & mechanical | Foothill-De Anza Community College District | Prime | $50,684 |
| Jul 7, 2025 | CS HVACHVAC & mechanical | Union Sanitary District | Prime | $24,665 |
| Jul 1, 2025 | HVAC FMCHVAC & mechanical | Union Sanitary District | Prime | $40,444 |
| Mar 20, 2025 | HH254320HVAC & mechanical | Foothill-De Anza Community College District | Subcontractor | $15,095 |
| Nov 15, 2024 | HVAC maintenance and repairsHVAC & mechanical | City of Livermore | Prime | $1,800,000 |
| Oct 29, 2024 | Delta Controls Services and RepairsOther | County of Alameda GSA-BMD | Prime | $81,779 |
| Sep 18, 2024 | Commercial, Domestic, and RefrigerationHVAC & mechanical | City of San Jose, Purchasing Dept | Subcontractor | $1,180,000 |
| Jul 16, 2024 | HVAC MaintenanceHVAC & mechanical | City of Pleasanton | Prime | $600,000 |
| Jul 1, 2024 | HVAC Preventive & Emergency MaintenanceHVAC & mechanical | Union Sanitary District | Prime | $29,464 |
| Jul 1, 2024 | HVAC Preventive & Emergency MaintenanceHVAC & mechanical | Union Sanitary District | Prime | $24,665 |
| — | 3-56138 MECHANICAL SYSTEMS MSA 2025HVAC & mechanical | San Jose State University | Prime | $3,000,000 |
Most recent 16 of 16. 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
- Union Sanitary District · 5 projects
- Foothill-De Anza Community College District · 4 projects
- County of Alameda GSA-BMD · 2 projects
- Central Contra Costa Sanitary District · 1 project
- City of Pleasanton · 1 project
- City of San Jose, Purchasing Dept · 1 project
- San Jose State University · 1 project
- City of Livermore · 1 project
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