Updated: Apr 26, 2026
Location and Projects
Address
6056 CALIF AVE SW, Seattle, WA, 98136
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Oneill Plumbing Co
Oneill Plumbing Co, 6056 Calif Ave SW, Seattle, WA (Employees: Katie Blanchard, O'neill, Terry C, and O'neill, Timothy Shannon) holds a Construction Contractor, General license and 2 other licenses according to the Tukwila license board.
Their BuildZoom score of 108 ranks in the top 5% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Oneill Plumbing Co, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Oneill Plumbing Co Services
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Oneill Plumbing Co Contact Information
Phone Number: (206) 932-5283
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Address: 6056 CALIF AVE SW, Seattle, WA 98136
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Oneill Plumbing Co Seattle
Quality
108
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Oneill Plumbing Co has a BuildZoom score of 108, which places them above 95% of 128,670 contractors in Washington.
Activity
|
1 project
|
2026 |
|
12 projects
|
2025 |
|
3 projects
|
2024 |
|
5 projects
|
2023 |
Our building permit records indicate that Oneill Plumbing Co has worked on at least
21.0 projects over the past 3 years.
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.
Experience
|
20 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Oneill Plumbing Co mostly works on
plumbing project
projects.
Pricing
|
3 projects
|
< $5k |
|
1 project
|
$5k-$20k |
The typical size of their permits is approximately $1,750. This graph shows the distribution of these job values.
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.
Jeryln|when submitting an application please ensure you have attached all required documents.|certification: by using this p-ortal 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 r... see more
Valuation:
N/A
Permit #:
PG25-0096
Status:
issued
Fee:
$105
Permit Type:
Residential
Building Type:
N/A
Install new electric water heater. install shower pan and valve. install 2 kitchen sinks. (1) clothes washer (1) electric water heater (1) shower/valve replacement (1) floor sink (2) kitchen sinks (1) toilet 2018 upc
Valuation:
$3,000
Permit #:
PLUM-2024-00119
Status:
expired
Fee:
$384
Permit Type:
N/A
Building Type:
N/A
Courtney|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 ... see more
Valuation:
N/A
Permit #:
PG23-0144
Status:
final
Fee:
$47
Permit Type:
Residential
Building Type:
N/A
1 generator 1 gas - stove or cook top 1 gas - barbeque 1
Valuation:
N/A
Permit #:
2505-184
Status:
issued
Fee:
$209
Permit Type:
N/A
Building Type:
N/A
1 toilet 8 sink 1 clothes washer 3 shower tub or combo
Valuation:
N/A
Permit #:
2505-037
Status:
issued
Fee:
$311
Permit Type:
N/A
Building Type:
N/A
Project name: mechanical a (single family residential) (alteration) project involving 1 generator
Valuation:
N/A
Permit #:
MECH23-018
Status:
issued
Fee:
$82
Permit Type:
N/A
Building Type:
N/A
A single family residential repair or replacement none project involving (1 bathroom sink 1 kitchen sink 1 ice maker)
Valuation:
N/A
Permit #:
24 113364 BN
Status:
final
Fee:
$96
Permit Type:
N/A
Building Type:
N/A
A single family residential repair or replacement none project involving (1 water service - 1")
Valuation:
N/A
Permit #:
24 117346 BN
Status:
final
Fee:
$59
Permit Type:
N/A
Building Type:
N/A
A single family residential repair or replacement project installing {1-bath fan 1-kitchen fan 1-stove or cooktop}
Valuation:
N/A
Permit #:
24 113366 BK
Status:
final
Fee:
$135
Permit Type:
N/A
Building Type:
N/A
A nonresidential repair or replacement none project involving (1 water heater electric
Valuation:
N/A
Permit #:
24 113715 BN
Status:
final
Fee:
$63
Permit Type:
N/A
Building Type:
N/A
A nonresidential repair or replacement none project involving (1 water heater
Valuation:
N/A
Permit #:
24 113716 BK
Status:
final
Fee:
$71
Permit Type:
N/A
Building Type:
N/A
Hanlon plumbing, a (single family residential) (repair or replacement) project involving piping - water service
Valuation:
N/A
Permit #:
PLM21-00148
Status:
final
Fee:
$53
Permit Type:
N/A
Building Type:
N/A
Mccarty building residential a (single family residential) (alteration) project involving 1 hot water heater
Valuation:
N/A
Permit #:
BLD2021-01315
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Type: plumbing single family class: replacement, , yang-brenner residence: installing piping - water service
Valuation:
N/A
Permit #:
PSF20-02181
Status:
final
Fee:
$48
Permit Type:
N/A
Building Type:
N/A
A single family residential repair or replacement none project involving (1 water service - 1")
Valuation:
N/A
Permit #:
23 114836 BN
Status:
final
Fee:
$54
Permit Type:
N/A
Building Type:
N/A
Demolish and rebuild new detached garage
Valuation:
N/A
Permit #:
SFR22-3187
Status:
final
Fee:
$3,993
Permit Type:
New building
Building Type:
N/A
A single family residential repair or replacement none project involving (1 water service - 1")
Valuation:
N/A
Permit #:
21 132032 BN
Status:
final
Fee:
$45
Permit Type:
N/A
Building Type:
N/A
Shower and lav sink (1) shower (1) bathroom sinks 2021 upc
Valuation:
$1,500
Permit #:
PLUM-2024-02368
Status:
expired
Fee:
$217
Permit Type:
N/A
Building Type:
N/A
Reduced pressure backflow assembly (rpba) 2
Valuation:
$7,000
Permit #:
P22006469
Status:
issued
Fee:
$107
Permit Type:
N/A
Building Type:
N/A
Project name: repair/replace 1 water supply piping
Valuation:
N/A
Permit #:
PLU22-0421
Status:
issued
Fee:
$212
Permit Type:
N/A
Building Type:
N/A
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Oneill Plumbing Co Reviews
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Verified License
BuildZoom confirmed this contractor's license
Oneill Plumbing Co License info
Verified License
| License # | ONEILP*253DP |
| Status | Active |
| City | Tukwila |
| Type | Construction Contractor, General |
| Class | Corporation |
| Business Type | Corporation |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Oneill Plumbing Co at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | ONEILPC793ND |
| Status | Active |
| City | Tukwila |
| Type | Plumbing Contractor, Journey Level |
| Class | Corporation |
| Business Type | Corporation |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Oneill Plumbing Co at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | ONEILP*253DP |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Oneill Plumbing Co at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
108
BuildZoom Score
Insured
| Insurer | Federated Mutual Ins Co |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Federated Mutual Ins Co |
| Bond Value | $12,000 |
1K
Permits
- Building permit records show that Oneill Plumbing Co has worked on 1014 permitted projects.
Oneill Plumbing Co Employees
KB
Katie Blanchard
Vice President
OC
O'neill, Terry C
President
OS
O'neill, Timothy Shannon
President
OW
O'neill, Wendy
Secretary
SO
Stephanie O'neill
Member
TO
Terry O'neill
President
TO
Timothy O'neill
President
TB
Tyler Blanchard
President
WO
Wendy O'neill
Secretary