KLAUS & SONS PLUMBING HEATING & AIR CONDITIONING
California contractor license #320990 · Montclair, San Bernardino County
License
- License number
- 320990
- Status
- Clear
- Classifications
- C-10 Electrical Contractor
- C-16 Fire Protection Contractor
- C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor
- C-36 Plumbing Contractor
- Business type
- Corporation
- Issued
- Jun 25, 1976
- Expires
- Jul 31, 2028
- Workers' compensation
- Workers' Compensation Insurance — Preferred Employers Insurance Company
- Contractor's bond
- $25,000 — American Contractors Indemnity Company
- DIR public works registration
- Registration expired Jun 30, 2026
From the California Contractors State License Board (CSLB) public license file, last updated Jun 19, 2026. Verify license #320990 on CSLB's License Check.
California public works
KLAUS & SONS PLUMBING HEATING & AIR CONDITIONING appears on 1 public works project registered with the California Department of Industrial Relations, 1 of them as the prime contractor, for 1 awarding body between 2025 and 2025. Projects it led total $4,250 in reported contract value.
| Date | Project | Awarding body | Role | Contract amount |
|---|---|---|---|---|
| Sep 29, 2025 | Fire Station 1Water | City of La Verne | Prime | $4,250 |
Most recent 1 of 1. 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 of La Verne · 1 project
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