Updated: Apr 04, 2026
Location and Projects
Address
10233 HEATHER STREET, Alta Loma, CA, 91701
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William N Mitchell III Construction
William N Mitchell III, 10233 Heather St, Alta Loma, CA (Owned by: William Neal Mitchell III) holds a General Building 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 William N Mitchell III, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
William N Mitchell III Services
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William N Mitchell III Contact Information
Phone Number: (909) 957-7468
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Address: 10233 HEATHER STREET, Alta Loma, CA 91701
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Building Permits by William N Mitchell III
This is a sample of this contractor's permits. Click here to access their complete permit history.
Clairemont mesa combination building permit for a conversion and addition of an existing detached garage to companion unit for an existing sdu. base zone: rs-1-7 geo: 25-53 fire: brush management
Valuation:
$63,418
Permit #:
2398264
Status:
complete
Fee:
$2,085
Permit Type:
Add/alt companion...
Building Type:
N/A
Replace front interior/exterior post due to dry wrought and water damage - restucco
Valuation:
N/A
Permit #:
PMT2015-00738
Status:
final
Fee:
$270
Permit Type:
N/A
Building Type:
N/A
Repair cracked fireplace
Valuation:
N/A
Permit #:
PMT2015-04154
Status:
final
Fee:
$138
Permit Type:
N/A
Building Type:
N/A
Replace dry rot beams and posts on existing 2nd story deck
Valuation:
N/A
Permit #:
PMT2017-00698
Status:
final
Fee:
$284
Permit Type:
N/A
Building Type:
N/A
336sf lattice covered patio
Valuation:
N/A
Permit #:
PMT2006-05897
Status:
final
Fee:
$86
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
William N Mitchell III License info
Verified License
| License # | 605167 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for William N Mitchell III 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 | American Contractors Indemnity Company |
| Bond Value | $15,000 |
William N Mitchell III Employees
WI
William Neal Mitchell III
Owner