Q4 MECHANICAL CORPORATION
California contractor license #1006003 · San Francisco, San Francisco County
License
- License number
- 1006003
- Status
- Clear
- Classifications
- C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor
- C-43 Sheet Metal Contractor
- Business type
- Corporation
- Issued
- Jul 30, 2015
- Expires
- Oct 31, 2027
- Workers' compensation
- Workers' Compensation Insurance — State Compensation Insurance Fund
- Contractor's bond
- $25,000 — Travelers Casualty And Surety Company Of America
- DIR public works registration
- Registered through Jun 30, 2027
From the California Contractors State License Board (CSLB) public license file, last updated Oct 17, 2025. Verify license #1006003 on CSLB's License Check.
California public works
Q4 MECHANICAL CORPORATION appears on 8 public works projects registered with the California Department of Industrial Relations, for 7 awarding bodies between 2023 and 2026.
| Date | Project | Awarding body | Role | Contract amount |
|---|---|---|---|---|
| Jan 16, 2026 | Piers 29 ½ & 31 (Partial) Parking GarageHVAC & mechanical | Port of San Francisco | Subcontractor | $855,000 |
| Nov 6, 2025 | Interdisciplinary Sciences Building - CoRoofing | University of California Santa Cruz | Subcontractor | $1,909,824 |
| Mar 25, 2025 | South Sunset Clubhouse RenovationBuildings & facilities | City and County of San Francisco - Dept. of Public Works | Subcontractor | $2,701,500 |
| Sep 10, 2024 | 1127 First Street HVAC and Roof ProjectPaving & streets | Napa County Public Works | Subcontractor | $319,494 |
| Apr 15, 2024 | Electric Service Center Tenant ImprovemeElectrical, low voltage & AV | City of Ukiah | Subcontractor | — |
| Jul 17, 2023 | 190 9th Street Energy Efficiency HVAC UpPaving & streets | City and County of San Francisco - Dept. of Public Works | Subcontractor | — |
| Feb 5, 2023 | New Operations and Engineering BuildingBuildings & facilities | Castro Valley Sanitary District | Subcontractor | — |
| Jan 7, 2023 | Piedmont Community Pool ProjectParks, landscape & fields | City of Piedmont | Subcontractor | — |
Most recent 8 of 8. 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
- City and County of San Francisco - Dept. of Public Works · 2 projects
- City of Piedmont · 1 project
- University of California Santa Cruz · 1 project
- City of Ukiah · 1 project
- Port of San Francisco · 1 project
- Napa County Public Works · 1 project
- Castro Valley Sanitary District · 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