Our Services
Installing septic systems and underground utilities since 1997.
Septic Systems
Septic Systems must be done right the first time. We will properly install your septic system to ensure years of…
Septic to Sewer
We offer septic to sewer conversions for clients in Clark & Cowlitz county. If you’re interested in converting from a…
Underground
Here in the Northwest, having good and reliable underground utilities is critical. Seppanen Construction will look to accomplish that for…
