Updated: Jun 18, 2026
Location and Projects
Address
P O BOX 3417, Berkeley, CA, 94703
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Kenneth R Mahaffey Construction
Kenneth R Mahaffey, Berkeley, Po Box 3417, Berkeley, CA (Owned by: Kenneth Ross Mahaffey) 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 Kenneth R Mahaffey, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Kenneth R Mahaffey Services
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Kenneth R Mahaffey Contact Information
Phone Number: (510) 849-9876
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Address: P O BOX 3417, Berkeley, CA 94703
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Seismic upgrade: replace brick foundation w/2 story this is not seismic. house raised 16 and is on cribbs. this is a fee permit -- creating habitable space in the basement -- no interior stairs front steps removed. need zoning & b&s approvals. combine this permit with new permit for creating habitable space. sbb
Valuation:
$30,000
Permit #:
B2003-03498
Status:
Closed Expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Repair (e) 8 x 9 wood deck. replace wood on deck surface. replace stair stringers & treads. replace 2x6 joists @ dry rot dmg only. all repairs to match (e). subject to field inspection
Valuation:
$1,485
Permit #:
B2002-02364
Status:
Closed Complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace foundation of rear cottage. no change to building height subject to field inspection. dryrot repairs and porch/stair repairs to be under separate permit
Valuation:
$20,000
Permit #:
B2001-04046
Status:
Closed Expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical service upgrade for front triplex and rear cottage. increase from 30 amp service to 125 amp service for all 4 units
Valuation:
$0
Permit #:
B2010-01181
Status:
Closed Complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace original 30 amp service with new 100 amp service per unit & breaker boxes for each unit
Valuation:
$0
Permit #:
B2001-01791
Status:
Closed Expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Tear off roofing matl at south end of buil- ding and install mdified bitumen roof system
Valuation:
$4,000
Permit #:
B2000-03268
Status:
Closed Complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Tear off roofing matl on south end of buil- ding and install modified bitumen roof system
Valuation:
$4,000
Permit #:
B2000-03269
Status:
Closed Complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Permit value$4kmessage contractor tear off roofing matl on south end of buil- ding and install modified bitumen roof system
Valuation:
N/A
Permit #:
B2000-03269
Status:
CLOSED COMPLETE
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replacing 2 story brick foundation with 2 story concrete foundation
Valuation:
$10,000
Permit #:
B2002-04420
Status:
Closed Complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
$20,000
Permit #:
B2003-03836
Status:
Closed Expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
HT-2021-001044
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Kenneth R Mahaffey License info
Verified License
| License # | 571972 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Kenneth R Mahaffey 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 | Suretec Indemnity Company |
| Bond Value | $15,000 |
6
Permits
- Building permit records show that Kenneth R Mahaffey has worked on 6 permitted projects.
Kenneth R Mahaffey Employees
KM
Kenneth Ross Mahaffey
Owner