Updated: Apr 19, 2026
Location and Projects
Address
5062 CAMINO ALTA MIRA, Castro Valley, CA, 94546
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Bill Siem Construction
Bill Siem Construction, 5062 Camino Alta Mira, Castro Valley, CA (Owned by: Bill Charles Siem) 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 Bill Siem Construction, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Bill Siem Construction Services
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Bill Siem Construction Contact Information
Phone Number: (510) 735-1832
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Address: 5062 CAMINO ALTA MIRA, Castro Valley, CA 94546
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Building Permits by Bill Siem Construction
This is a sample of this contractor's permits. Click here to access their complete permit history.
(e-plan) roof mounted photovoltaic solar system
Valuation:
N/A
Permit #:
00867945-RRA
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Tear off and re-roof (class a'). install spark arrestor if needed. ***revision to include sheathing mjm 10/29/15***
Valuation:
$12,000
Permit #:
B15-1181
Status:
final
Fee:
$332
Permit Type:
N/A
Building Type:
N/A
Duplex: foundation replacement 5/8 sheetrock at basement ceiling (ceiling ht to remain at 7'3 finished) install shearwall (brick to concrete entire basement to remain storage only no exterior changes)
Valuation:
$36,000
Permit #:
B03-0131
Status:
final
Fee:
$643
Permit Type:
N/A
Building Type:
N/A
(e plan) pool and spa
Valuation:
N/A
Permit #:
00887325-RMO
Status:
triage
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remove & replace foundation (140 lf) brick to concrete***5/7/09 revision to permit - new 6 x 6 posts with collum cap
Valuation:
$8,000
Permit #:
B09-0195
Status:
Finaled
Fee:
$1,356
Permit Type:
N/A
Building Type:
N/A
Duplex: run piping for future sump under new foundaton (add'm to b03-1031)
Valuation:
$500
Permit #:
P03-5108
Status:
final
Fee:
$67
Permit Type:
N/A
Building Type:
N/A
Electrical service upgrade from (2) 60 amp meters to (2) 100 amp meters
Valuation:
$2,500
Permit #:
E07-1544
Status:
final
Fee:
$284
Permit Type:
N/A
Building Type:
N/A
Install kelly clean-out and test sewer lateral
Valuation:
$1,000
Permit #:
P04-5573
Status:
final
Fee:
$67
Permit Type:
N/A
Building Type:
N/A
R/r siding at rear of single family dwelling (like for like)
Valuation:
$500
Permit #:
B09-0471
Status:
final
Fee:
$115
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
$0
Permit #:
UWP-0001357
Status:
N/A
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
$0
Permit #:
UWP-0001356
Status:
N/A
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Bill Siem Construction License info
Verified License
| License # | 866184 |
| 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 Bill Siem Construction 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 |
6
Permits
- Building permit records show that Bill Siem Construction has worked on 6 permitted projects.
Bill Siem Construction Employees
BS
Bill Charles Siem
Owner