Location and Projects
Seppanen Construction LLC
With more than 25 years of experience in excavation and underground services, Seppanen Construction LLC serves residential and contractor clients throughout Southwest Washington. Based in Ridgefield, the company works across Clark, Cowlitz, Wahkiakum, and Lewis counties. Brian Seppanen, who has operated excavators since high school, leads the business and oversees projects with a focus on septic system installation, septic to sewer conversions, and a range of underground utility work. The team regularly handles both new installations and conversions for homeowners and contractors. Seppanen Construction is known for its knowledge of diverse septic system types and has provided excavation services in the region since 1997.
Seppanen Construction LLC Services
Seppanen Construction LLC Contact Information
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Building Permits by Seppanen Construction LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
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Seppanen Construction LLC License info
Verified License
| License # | SEPPACL974JC |
| 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 Seppanen Construction LLC at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | SEPPACL974JC |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Seppanen Construction LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
99
BuildZoom Score
Insured
| Insurer | American Fire & Casualty Co |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | OLD REPUBLIC SURETY CO |
| Bond Value | $12,000 |
6
Permits
- Building permit records show that Seppanen Construction LLC has worked on 6 permitted projects.