Updated: Apr 28, 2026
Location and Projects
Address
1323 DELL AVE, Walla Walla, WA, 99362
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A 1 Plumbng & Emergency Rooter
A 1 Plumbng & Emergency Rooter, 1323 Dell Ave, Walla Walla, WA (Owned by: Knowles, David Othniel) holds a Plumbing Contractor, Journey Level license and 3 other licenses according to the Tukwila license board.
Their BuildZoom score of 105 ranks in the top 8% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring A 1 Plumbng & Emergency Rooter, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
A 1 Plumbng & Emergency Rooter Services
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A 1 Plumbng & Emergency Rooter Contact Information
Phone Number: (509) 525-6688
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Address: 1323 DELL AVE, Walla Walla, WA 99362
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Building Permits by A 1 Plumbng & Emergency Rooter
This is a sample of this contractor's permits. Click here to access their complete permit history.
Rough in plumbing of fixtures & electrical water heater
Valuation:
N/A
Permit #:
B23-0165
Status:
final
Fee:
$103
Permit Type:
Residential
Building Type:
N/A
Replace cast iron drain lines with abs
Valuation:
N/A
Permit #:
B23-0193
Status:
expired
Fee:
$103
Permit Type:
Residential
Building Type:
N/A
Install new water lines and drain lines for 2 handwash sinks
Valuation:
N/A
Permit #:
B24-003
Status:
final
Fee:
$206
Permit Type:
Commercial
Building Type:
N/A
Re-pipe potable h2o system of house & replace fixtures
Valuation:
N/A
Permit #:
B23-0330
Status:
expired
Fee:
$103
Permit Type:
Residential
Building Type:
N/A
Install water line install backflow & run to irrigation
Valuation:
N/A
Permit #:
B23-0334
Status:
final
Fee:
$103
Permit Type:
Residential
Building Type:
N/A
Replace water line from meter to home
Valuation:
N/A
Permit #:
B24-387
Status:
final
Fee:
$206
Permit Type:
Residential
Building Type:
N/A
Replace heat pump and air handler
Valuation:
N/A
Permit #:
B24-166
Status:
expired
Fee:
$206
Permit Type:
Residential
Building Type:
N/A
Replace 50 gal electric water heater
Valuation:
N/A
Permit #:
B21-0445
Status:
final
Fee:
$103
Permit Type:
Co residential
Building Type:
N/A
Replacing waterline from meter to house
Valuation:
N/A
Permit #:
B23-0607
Status:
final
Fee:
$103
Permit Type:
Residential
Building Type:
N/A
Interior remodel of pole building for adu
Valuation:
N/A
Permit #:
B20-0242
Status:
expired
Fee:
$1,703
Permit Type:
Co residential
Building Type:
N/A
Replacing water heater
Valuation:
N/A
Permit #:
B23-0600
Status:
final
Fee:
$103
Permit Type:
Residential
Building Type:
N/A
Install new gas line for guest house
Valuation:
N/A
Permit #:
B19-0037
Status:
expired
Fee:
$103
Permit Type:
Co residential
Building Type:
N/A
Install new gas line for guest house
Valuation:
N/A
Permit #:
B19-0037
Status:
expired
Fee:
$103
Permit Type:
Co residential
Building Type:
N/A
Gas line - running 75 pe gas line to fire pit in backyard
Valuation:
N/A
Permit #:
B23-0084
Status:
expired
Fee:
N/A
Permit Type:
Residential
Building Type:
N/A
Replacement of 50 gal electric water heater
Valuation:
N/A
Permit #:
B15-0442
Status:
expired
Fee:
$27
Permit Type:
Co residential
Building Type:
N/A
Replace 50 gal electric water heater
Valuation:
N/A
Permit #:
B15-0463
Status:
final
Fee:
$27
Permit Type:
Co residential
Building Type:
N/A
40 of gas piping for glycol machine by dock
Valuation:
N/A
Permit #:
B21-0357
Status:
expired
Fee:
$206
Permit Type:
Co commercial
Building Type:
N/A
Installation of gas line for generator
Valuation:
N/A
Permit #:
B14-1273
Status:
expired
Fee:
$30
Permit Type:
Co residential
Building Type:
N/A
Replace 50 gal electric water heater
Valuation:
N/A
Permit #:
B15-0463
Status:
final
Fee:
$27
Permit Type:
Co residential
Building Type:
N/A
Replace 50 gal electric water heater
Valuation:
N/A
Permit #:
B15-0463
Status:
final
Fee:
$27
Permit Type:
Co residential
Building Type:
N/A
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A 1 Plumbng & Emergency Rooter Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
A 1 Plumbng & Emergency Rooter License info
Verified License
| License # | 1PLUMPE791MW |
| Status | Active |
| City | Tukwila |
| Type | Plumbing Contractor, Journey Level |
| Class | Limited Liability Company |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for A 1 Plumbng & Emergency Rooter at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 1PLUMPE878PN |
| Status | Active |
| City | Tukwila |
| Type | Construction Contractor, General |
| Class | Limited Liability Company |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for A 1 Plumbng & Emergency Rooter at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 1PLUMPE791MW |
| Status | Active |
| State | Washington |
| Type | Plumbing Contractor, Plumbing Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for A 1 Plumbng & Emergency Rooter 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 # | 1PLUMPE878PN |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for A 1 Plumbng & Emergency Rooter at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
105
BuildZoom Score
Insured
| Insurer | American Hallmark Ins Co Of Te |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Travelers Cas & Surety Co Of America |
| Bond Value | $6,000 |
21
Permits
- Building permit records show that A 1 Plumbng & Emergency Rooter has worked on 21 permitted projects.
A 1 Plumbng & Emergency Rooter Employees
DK
David Knowles
Partner/Member
JK
Jeffery Knowles
Partner/Member
JK
Jeremy Knowles
Partner/Member
JH
John Hallowell
Partner/Member
KO
Knowles, David Othniel
Owner
KS
Knowles, Jeffery Shammah
Owner
MH
Matthew Harri
Partner/Member
RK
Rose Knowles
Partner/Member
WH
Wendy Hodgen
Partner/Member
ZW
Zebulon Walter
Partner/Member