ON-SITE SEPTIC SYSTEM INSTALLATION Done right since 1997! LEARN MORE UNDERGROUND UTILITIES For homeowners and contractors GET A BID!

Our Services

We also provide field mowing! Give us a call to get scheduled.

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…

About Us

OVER 20 YEARS OF SERVICE AND QUALITY

About Us

 Seppanen Construction has been providing septic system installation, excavation and underground services to residents and contractors in Clark & Cowlitz County since 1997. We are known for our reliability, professionalism, and knowledge of all types of septic systems. Brian Seppanen has been operating an excavator since high school and runs his business with integrity and expertise. We do both contractor and homeowner excavation…

Employment Opportunities

Seppanen Construction, LLC is currently accepting employment applications. We provide year round reliable work with company paid employee health insurance. Download our Application to get started! Then send it back to us at email@seppanen.com.

Contact Us

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Contact

Send us a message and we’ll get back to you as soon as possible.

  • Email Address

    email@seppanen.com

  • Phone Number

    (360) 263-7950

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