Peterson Mechanical Inc
Peterson Mechanical Inc is an active, licensed contractor operating in Sonoma, CA. Operating under a California contractor license established in 1957. They hold 9 license classifications including B General Building Contractor, C-4 Boiler, Hot-Water Heating and Steam Fitting Contractor, and 7 others. They currently maintain an active contractor bond and workers' compensation insurance. No disciplinary actions have been recorded against this license.
License Information
- License Number
- 171486
- Status
- Active
- Classification(s)
- B: General Building Contractor, C-4: Boiler, Hot-Water Heating and Steam Fitting Contractor, C-16: Fire Protection Contractor, C-20: Warm-Air Heating, Ventilating and Air-Conditioning (HVAC) Contractor, C-34: Pipeline Contractor, C-36: Plumbing Contractor, C-38: Refrigeration Contractor, C-42: Sanitation System Contractor, C-43: Sheet Metal Contractor
- Tenure
- Licensed since 1957 (68 years)
- Issue Date
- November 07, 1957
- Expiration Date
- June 30, 2026
- Disciplinary Record
- No Disciplinary Actions
Bond & Insurance
- Contractor Bond
- Bonded ($25000) – AMERICAN CONTRACTORS INDEMNITY COMPANY
- Workers’ Compensation
- Workers' Compensation Insurance – OLD REPUBLIC INSURANCE COMPANY
A contractor’s bond protects consumers up to the bond amount if the contractor fails to fulfill contractual obligations or violates CSLB regulations.
Workers’ compensation insurance protects homeowners from liability if a contractor’s employee is injured on the job site.
Location
- Address
- P O BOX 450
- City
- Sonoma, CA
- ZIP Code
- 95476
- Phone
- (707) 938-8481
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About These License Types
B: General Building Contractor
Authorizes construction of structures including residential, commercial, and industrial buildings requiring at least two unrelated building trades or crafts. May take prime contracts or subcontracts for framing or carpentry. May subcontract all specialty work but must hold the appropriate C license to self-perform specialty trade work.
Not authorized: Cannot self-perform specialty trade work (electrical, plumbing, HVAC, etc.) without holding the corresponding C license. Cannot contract for C-16 Fire Protection or C-57 Well Drilling without the appropriate license or subcontractor.
C-4: Boiler, Hot-Water Heating and Steam Fitting Contractor
Installs, services, and repairs power boiler installations, hot-water heating systems and steam fitting, including fire-tube and water-tube boilers, piping, fittings, valves, gauges, pumps, radiators, fuel oil tanks, chimneys, flues, and associated solar heating equipment.
Not authorized: Does not include warm-air heating or air conditioning systems (see C-20).
C-16: Fire Protection Contractor
Lays out, fabricates, and installs all types of fire protection systems including all associated equipment.
Not authorized: Does not include electrical alarm systems.
C-20: Warm-Air Heating, Ventilating and Air-Conditioning (HVAC) Contractor
Fabricates, installs, maintains, services, and repairs warm-air heating systems and water heating heat pumps, ventilating systems, air-conditioning systems, and the ducts, registers, flues, humidity and thermostatic controls and air filters in connection with these systems. Includes solar-powered HVAC systems.
Not authorized: Does not include boiler or steam heating (see C-4) or refrigeration below 50F (see C-38).
C-34: Pipeline Contractor
Fabricates and installs pipelines for conveyance of fluids such as water, gas, or petroleum, including protective coatings and the trenching, boring, shoring, backfilling, compacting, paving, and surfacing to complete installation.
C-36: Plumbing Contractor
Provides means for a supply of safe water and proper disposal of fluid waste, including piping, storage tanks, venting, gas appliances and connections, water and gas piping, water heating equipment including solar, and health and safety devices such as backflow preventers and gas earthquake valves.
Not authorized: Does not include forced warm-air units (see C-20).
C-38: Refrigeration Contractor
Constructs, fabricates, erects, installs, maintains, services, and repairs refrigerators, refrigerated rooms, insulated spaces, temperature insulation, air-conditioning units, ducts, blowers, and thermostatic controls for temperatures below 50 degrees Fahrenheit (10 degrees Celsius).
Not authorized: Temperatures above 50F fall under C-20 HVAC.
C-42: Sanitation System Contractor
Fabricates and installs cesspools, septic tanks, storm drains, and other sewage disposal and drain structures, including cast iron, steel, concrete, and vitreous pipe.
C-43: Sheet Metal Contractor
Selects, cuts, shapes, fabricates, and installs sheet metal including cornices, flashings, gutters, leaders, pans, kitchen equipment, duct work with insulation, patented chimneys, metal flues, and metal roofing systems.
Licensing Resources
Workers' comp requirements for California contractors
Deposit and payment rules for California contracts
Home improvement contract requirements
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License data sourced from the California Contractors State License Board. Last data update: April 05, 2026.