Updated: May 26, 2026
Location and Projects
Address
Renton, WA, 98059
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Cahill, William K Plumber
Cahill, William K, Renton, WA holds a Plumber, Plumber license and 2 other licenses according to the Washington license board.
Their BuildZoom score of 95 ranks in the top 22% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Cahill, William K, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Cahill, William K Services
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Cahill, William K Contact Information
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This is a sample of this contractor's permits. Click here to access their complete permit history.
When submitting an application please ensure you have attached all required documents.|certification: by using this portal to apply for permits i certify i am the owner of the property or the owner's authorized agent. if acting as an authorized agent i further certify that i have full power and authority to file this application and to perform on behalf of the owner all acts required ... see more
Valuation:
N/A
Permit #:
EL24-0741
Status:
filed
Fee:
N/A
Permit Type:
Residential
Building Type:
N/A
Service change 1-200 amps adding or altering 0-5 circuits
Valuation:
N/A
Permit #:
ELE24-0525
Status:
complete
Fee:
$254
Permit Type:
N/A
Building Type:
N/A
E21-08474 service change alteration of one ckt only no service
Valuation:
N/A
Permit #:
ELE-21-0370
Status:
complete
Fee:
$106
Permit Type:
N/A
Building Type:
N/A
(1) service change 1-200 amps
Valuation:
N/A
Permit #:
ELE24-1261
Status:
issued
Fee:
$127
Permit Type:
N/A
Building Type:
N/A
(1) data cable system
Valuation:
N/A
Permit #:
ELE25-2485
Status:
issued
Fee:
$122
Permit Type:
N/A
Building Type:
N/A
Level yard for shed , level yard for shed
Valuation:
N/A
Permit #:
BLD2006-00178
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Service panel change out (1)
Valuation:
N/A
Permit #:
ELE25-3657
Status:
issued
Fee:
$131
Permit Type:
N/A
Building Type:
N/A
Service change (1)
Valuation:
N/A
Permit #:
ELE25-2799
Status:
final
Fee:
$131
Permit Type:
N/A
Building Type:
N/A
Service change 1-200 amps
Valuation:
N/A
Permit #:
ELE24-0402
Status:
issued
Fee:
$127
Permit Type:
N/A
Building Type:
N/A
Refund to be requested
Valuation:
$150
Permit #:
OL21-1752
Status:
canceled
Fee:
$150
Permit Type:
Electrical
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Cahill, William K License info
Verified License
| License # | CAHILWA811KZ |
| Status | Active |
| State | Washington |
| Type | Plumber, Plumber |
| Business Type | Individual |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Cahill, William K at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | CAHILWK031KM |
| Status | Active |
| State | Washington |
| Type | Plumber, Plumber |
| Business Type | Individual |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Cahill, William K at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CAHILWA920RP |
| Status | Inactive |
| State | Washington |
| Business Type | Individual |
- According to the Washington State Department of Labor & Industries, 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 Cahill, William K at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
95
BuildZoom Score
10
Permits
- Building permit records show that Cahill, William K has worked on 10 permitted projects.