Updated: May 02, 2026
Location and Projects
Address
5100 B-1 CLAYTON RD #293, Concord, CA, 94521
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Walco Drywall and Plaster Contractor
Walco, 5100 B-1 Clayton Rd, Concord, CA (Employees: Richard Ambrose Walsh, Richard Ambrose Walsh Jr, and Richard Ambrose Walsh Sr) holds a Drywall license and 5 other licenses according to the California license board.
Their BuildZoom score of 98 ranks in the top 16% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Walco, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Walco Contact Information
Phone Number: (925) 567-4238
Address: 5100 B-1 CLAYTON RD #293, Concord, CA 94521
Walco Concord
Quality
98
84th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Walco has a BuildZoom score of 98, which places them above 84% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
Our building permit records indicate that Walco has worked on at least
1.0 project over the past year.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Pricing
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Removal of walls and ceilings from prior food manufacturing facility to bare warehouse state - also smoothing of epoxy floor and reapplication of epoxy no exterior alterations
Valuation:
$250,000
Permit #:
BL-TI-2025-00034
Status:
issued
Fee:
$6,593
Permit Type:
N/A
Building Type:
N/A
Phase 1 like for like kitchen remodel. new cabinets counter tops and flooring. update electric and recepts to code. reset water heater and replumbing washing machine. new load center 100a to 100a. ** 7/19/19 - reinstate permit - bdb ** **3/3/20 - renew for final jcollignon**
Valuation:
N/A
Permit #:
BIAL18-012550
Status:
final
Fee:
$1,344
Permit Type:
N/A
Building Type:
N/A
Phase 2 like for like bathroom remodel. replace tub/shower toilet and vanity in both bathrooms. ** 7/19/19 - reinstate permit - bdb ** **3/3/20 renew for final jcollignon** **10/8/20 revsion to replace windows in bathrooms like for like. and to install shower instead of tub in bathroom b. cm**
Valuation:
N/A
Permit #:
BIAL18-012553
Status:
final
Fee:
$1,152
Permit Type:
N/A
Building Type:
N/A
Replace meter box & mast; interior electrical. upgrade to code; drywall repair
Valuation:
$1,000
Permit #:
BP03001748
Status:
final
Fee:
$70
Permit Type:
N/A
Building Type:
N/A
Remodel mstr bathrm & replace all windows
Valuation:
$4,000
Permit #:
BP04003055
Status:
final
Fee:
$268
Permit Type:
N/A
Building Type:
N/A
Rf 930227-
Valuation:
N/A
Permit #:
BIT0000197303
Status:
final
Fee:
$1,319
Permit Type:
N/A
Building Type:
N/A
Replace garage ceiling
Valuation:
$1,800
Permit #:
B02-001785
Status:
FINALED
Fee:
$115
Permit Type:
N/A
Building Type:
N/A
Walco Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Walco License info
Verified License
| License # | 1087801 |
| Status | Active |
| State | California |
| Type | Drywall |
| Business Type | Partnership |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Walco at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 1040713 |
| Status | Inactive |
| State | California |
| Type | Insulation And Acoustical, Drywall, General Building |
| Business Type | Partnership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Walco at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 1034784 |
| Status | Inactive |
| State | California |
| Type | Drywall |
| Business Type | Partnership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Walco at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 721667 |
| Status | Inactive |
| State | California |
| Type | General Building, Insulation And Acoustical, Drywall |
| Business Type | Partnership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Walco at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 183310 |
| Status | Inactive |
| State | California |
| Type | General Building, Insulation And Acoustical, Drywall |
| Business Type | Partnership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Walco at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 853766 |
| Status | Inactive |
| State | California |
| Type | General Building, Insulation And Acoustical, Drywall |
| Business Type | Partnership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Walco at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
98
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Truck Insurance Exchange |
6
Permits
- Building permit records show that Walco has worked on 6 permitted projects.
Walco Employees
RW
Richard Ambrose Walsh
General Partner
RJ
Richard Ambrose Walsh Jr
Sole Owner
RS
Richard Ambrose Walsh Sr
Qualify Partner
TW
Thomas Francis Walsh
General Partner
WW
William Russell Walsh
Sole Owner