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William G Barnes & Son Co Construction
Serving Sunnyvale and the surrounding Silicon Valley area for over 50 years, William G Barnes & Son Co Inc specializes in mechanical contracting services for commercial and industrial properties. This company’s portfolio includes projects such as HVAC system installation, ductwork fabrication, and mechanical system upgrades for offices, schools, and laboratories. Their expertise covers both new construction and retrofit work, addressing heating, ventilation, and air conditioning requirements for a range of building types. William G Barnes & Son Co Inc also works with property managers, facility owners, and general contractors to deliver efficient mechanical solutions tailored to site-specific needs. With half a century of industry presence, the company has built experience in managing complex mechanical projects from design through installation and ongoing system maintenance in Silicon Valley’s evolving commercial landscape.
William G Barnes & Son Co Inc Services
William G Barnes & Son Co Inc Contact Information
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Building Permits by William G Barnes & Son Co Inc
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William G Barnes & Son Co Inc License info
Verified License
| License # | 298603 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for William G Barnes & Son Co Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 367245 |
| Status | Inactive |
| State | California |
| Type | General Building, General Engineering |
| Business Type | Corporation |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for William G Barnes & Son Co Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 554361 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for William G Barnes & Son Co Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 397018 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for William G Barnes & Son Co Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
95
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |