Updated: Jan 29, 2026
Location and Projects
Address
P O BOX 338, Concord, CA, 94522
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WC Concrete
WC Concrete at P O BOX 338, Concord, CA 94522, held a Concrete Contractor license (#668671) with the California contractors license board with an expiration date of 04-30-2029. We last verified the license was inactive on 01-28-2026.
Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 336,931 California contractors.
If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our project planner to be easily matched to qualified, licensed professionals in your area.
WC Concrete Services
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WC Concrete Contact Information
Phone Number: (925) 687-8044
Edit
Address: P O BOX 338, Concord, CA 94522
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Repair driveway only: repair driveway to city standards. same size: not widening. if working within 25 feet of a monument you must comply with state law 8771 contact the inspector prior to starting excavation: minimum $5 800.00 fine for non-compliance comply with all terms of city of oakland public works standards street excavation rules revised march 2015 and city council ordinance n... see more
Valuation:
N/A
Permit #:
CGS16224
Status:
final
Fee:
$506
Permit Type:
N/A
Building Type:
N/A
Permit value$42k tenant improvement coopervision back of building relocating work stations 2 new offices new conference room upgrading 2 restrooms to ada compliance
Valuation:
N/A
Permit #:
B15-3638
Status:
APPROVED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Ti coopervision / back of building relocating work stations / 2 new offices, new conference room, upgrading 2 restrooms to ada compliance
Valuation:
$42,000
Permit #:
B15-3638
Status:
Approved
Fee:
$798
Permit Type:
N/A
Building Type:
N/A
Permit value$18.4k demolish demolish only for coopervision rear portion of building walls for new offices and open office areas
Valuation:
N/A
Permit #:
B15-3534
Status:
APPROVED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Demo demo only for coopervision / rear portion of building / walls for new offices and open office areas.
Valuation:
$18,400
Permit #:
B15-3534
Status:
Approved
Fee:
$309
Permit Type:
N/A
Building Type:
N/A
Permit value$2.8kmessage contractor window replacement. 1-14-08: #0706393.construct stairway & landing at south side remove stair/footing at north side replace w/guardrail. final work started under b0704989
Valuation:
N/A
Permit #:
B0903959
Status:
EXPIRED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Repair sidewalk (minimum 2% slope) and driveway (same size: not widening) to city standards. call pwa inspection prior to start: 510-238-3651. 4th floor
Valuation:
N/A
Permit #:
CGS110128
Status:
final
Fee:
$561
Permit Type:
N/A
Building Type:
N/A
New driveway approach for circular driveway
Valuation:
$0
Permit #:
EE140942
Status:
APPROVED
Fee:
$174
Permit Type:
N/A
Building Type:
N/A
Repair sidewalk (minimum 2% slope) and driveway (same size: not widening) to city standards. call pwa inspection prior to start: 510-238-3651. 4th floor
Valuation:
N/A
Permit #:
CGS110128
Status:
FINAL
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
New concrete driveway approach and extension
Valuation:
$0
Permit #:
EE140557
Status:
APPROVED
Fee:
$169
Permit Type:
N/A
Building Type:
N/A
Repair sidewalk (minimum 2% slope) to city standards. call pwa inspection prior to start: 510-238-3651. 4th floor
Valuation:
N/A
Permit #:
CGS110129
Status:
final
Fee:
$532
Permit Type:
N/A
Building Type:
N/A
Pool repair per plans concrete contractor: w c concrete - license # 668671
Valuation:
N/A
Permit #:
BIP10-006990
Status:
issued
Fee:
$2,001
Permit Type:
N/A
Building Type:
N/A
Driveway for new 4235s/f s.f.d. with 506s/f attached garage and restore abandoned driveway
Valuation:
N/A
Permit #:
CGS040242
Status:
issued
Fee:
$322
Permit Type:
N/A
Building Type:
N/A
Driveway for new 4235s/f s.f.d. with 506s/f attached garage and restore abandoned driveway
Valuation:
N/A
Permit #:
CGS040242
Status:
PERMIT ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remove existing driveway apron install same as old
Valuation:
N/A
Permit #:
PW06-00121
Status:
final
Fee:
$189
Permit Type:
Permanent
Building Type:
N/A
Removed existing driveway w/o permits install new
Valuation:
N/A
Permit #:
B06-00771
Status:
final
Fee:
$364
Permit Type:
Replace
Building Type:
N/A
Retaining wall only (sep. permit for spa)
Valuation:
$480
Permit #:
B0019910
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Repair d/w no wider
Valuation:
N/A
Permit #:
CGS070400
Status:
final
Fee:
$485
Permit Type:
N/A
Building Type:
N/A
Remove & replace 25 lf of curb & gutter
Valuation:
$3,500
Permit #:
PW12-0361
Status:
final
Fee:
$297
Permit Type:
Concrete
Building Type:
N/A
Remove & replace 25 lf of curb & gutter
Valuation:
$3,500
Permit #:
PW12-0360
Status:
final
Fee:
$297
Permit Type:
Concrete
Building Type:
N/A
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WC Concrete Reviews
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WC Concrete License info
Inactive License
| License # | 668671 |
| Status | Inactive |
| State | California |
| Type | Concrete |
| Business Type | Sole Ownership |
- 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 WC Concrete at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
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- *No active license on file. If you are WC Concrete, click “This is My Business” to update your information.
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Security National Insurance Company |
14
Permits
- Building permit records show that WC Concrete has worked on 14 permitted projects.
WC Concrete Employees
GC
Guillermo Caro Castillo
Sole Owner