Updated: May 15, 2026
Location and Projects
Address
5625 90TH AVE SE, Mercer Island, WA, 98040
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Mjtk Backflow Testing Plumber
Mjtk Backflow Testing, 5625-90 Th Ave SE, Mercer Island, WA (Owned by: Kroeger, Theresa Marie) holds a Plumbing Contractor, Backflow Specialty license and 3 other licenses according to the Tukwila license board.
Their BuildZoom score of 94 ranks in the top 24% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Mjtk Backflow Testing, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Mjtk Backflow Testing Services
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Mjtk Backflow Testing Contact Information
Phone Number: (206) 786-6823
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Address: 5625 90TH AVE SE, Mercer Island, WA 98040
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Building Permits by Mjtk Backflow Testing
This is a sample of this contractor's permits. Click here to access their complete permit history.
Install backflow assembly for irrigation
Valuation:
N/A
Permit #:
1909-025
Status:
final
Fee:
$173
Permit Type:
N/A
Building Type:
N/A
Install premises isolation rpba
Valuation:
N/A
Permit #:
1707-290
Status:
final
Fee:
$90
Permit Type:
N/A
Building Type:
N/A
Remesis isolation rpba
Valuation:
N/A
Permit #:
1606-061
Status:
final
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Remesis isolation rpba
Valuation:
N/A
Permit #:
1605-096
Status:
final
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Remisis isolation rpba
Valuation:
N/A
Permit #:
1604-115
Status:
final
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Install rpba
Valuation:
N/A
Permit #:
1605-299
Status:
final
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Remises isolation rpba
Valuation:
N/A
Permit #:
1608-301
Status:
final
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Installation of approved [dcva] backflow assembly
Valuation:
$0
Permit #:
575093
Status:
Final
Fee:
$65
Permit Type:
N/A
Building Type:
N/A
Adding riser to existing cleanout
Valuation:
N/A
Permit #:
1911-159
Status:
expired
Fee:
$278
Permit Type:
N/A
Building Type:
N/A
Remises isolation rpba
Valuation:
N/A
Permit #:
1612-054
Status:
expired
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Premises isolation rpba
Valuation:
N/A
Permit #:
1611-083
Status:
expired
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Premises isolation rpba
Valuation:
N/A
Permit #:
1611-044
Status:
expired
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Premises isoltation rpba
Valuation:
N/A
Permit #:
1608-300
Status:
expired
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Install rpba
Valuation:
N/A
Permit #:
1607-018
Status:
expired
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Install premise isolation
Valuation:
N/A
Permit #:
1606-272
Status:
expired
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Remesis isolation rpba
Valuation:
N/A
Permit #:
1606-230
Status:
expired
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Mjtk Backflow Testing License info
License Not Verified
| License # | MJTKBB*763JA |
| Status | Active |
| City | Tukwila |
| Type | Plumbing Contractor, Backflow Specialty |
| Class | Individual |
| Business Type | Partnership |
- When BuildZoom last verified this license, it had an expiration date of April, 2026. Check the current license status of Mjtk Backflow Testing with the The City of Tukwila, WA
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | MJTKBB*763JA |
| Status | Active |
| State | Washington |
| Type | Plumbing Contractor, Plumbing Contractor |
| Business Type | Partnership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Mjtk Backflow Testing 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 # | MJTKBBT848JF |
| Status | Inactive |
| City | Tukwila |
| Type | Construction Contractor, Plumbing |
| Class | Partnership |
| Business Type | Partnership |
- According to the The City of Tukwila, WA, 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 Mjtk Backflow Testing at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | MJTKBBT848JF |
| Status | Inactive |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Partnership |
- 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 Mjtk Backflow Testing at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
94
BuildZoom Score
Insured
| Insurer | Truck Ins Exchange |
| Insured up to | $1,000,000 |
Bonded
| Bond Value | $6,000 |
16
Permits
- Building permit records show that Mjtk Backflow Testing has worked on 16 permitted projects.
Mjtk Backflow Testing Employees
JK
James Kroeger
Partner
KJ
Kroeger, James John
Owner
KM
Kroeger, Theresa Marie
Owner
TK
Theresa Kroeger
Partner