Updated: Jul 28, 2026
Location
Address
PO BOX 63, Maple Valley, WA, 98038
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Dennehy's Backflow Service Construction
Their BuildZoom score of 0 does not rank in the top 50% of Washington contractors.
If you are thinking of hiring Dennehy's Backflow Service, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Dennehy's Backflow Service Services
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Dennehy's Backflow Service Contact Information
Phone Number: (206) 919-9235
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Address: PO BOX 63, Maple Valley, WA 98038
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Dennehy's Backflow Service License info
License Not Verified
| License # | DENNEBS879LR |
| Status | Active |
| City | Tukwila |
| Type | Construction Contractor, Irrigation/Sprinkling Systems |
| Class | Individual |
| Business Type | Individual |
- When BuildZoom last verified this license, it had an expiration date of May, 2026. Check the current license status of Dennehy's Backflow Service with the The City of Tukwila, WA
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | DENNEBS879LR |
| Status | Inactive |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| 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 Dennehy's Backflow Service at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
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- *No active license on file. If you are Dennehy's Backflow Service, click “This is My Business” to update your information.
Insured
| Insurer | Ohio Security Ins Co |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Developers Surety & Indem Co |
| Bond Value | $6,000 |
Dennehy's Backflow Service Employees
DP
Dennehy, Sean Patrick
Owner
SD
Sean Dennehy
Owner