Updated: Apr 16, 2026
Location
Address
P O BOX 1387, Mammoth Lakes, CA, 93546
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Duff & Sons Construction
Duff & Sons Inc, Mammoth Lks, Po Box 1387, Mammoth Lakes, CA (Employees: Alicia Duff, Alicia Duff, and Grant Kelly Duff Ii) holds a General Building, Electrical license according to the California license board.
Their BuildZoom score of 92 ranks in the top 32% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Duff & Sons Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Duff & Sons Inc Services
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Duff & Sons Inc Contact Information
Phone Number: (559) 731-8948
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Address: P O BOX 1387, Mammoth Lakes, CA 93546
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Duff & Sons Inc License info
Verified License
| License # | 1063434 |
| Status | Active |
| State | California |
| Type | General Building, Electrical |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Duff & Sons Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
92
BuildZoom Score
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $15,000 |
Duff & Sons Inc Employees
AD
Alicia Duff
Officer
AD
Alicia Duff
Officer
GI
Grant Kelly Duff Ii
Rmo / Ceo / Pres