Serving Commercial, Residential & Industrial Sites

Expert Septic and Excavation Solutions

DeJonghe Septic & Excavation is a family-owned and operated business proudly based in Tecumseh, Michigan. With deep local roots and a strong reputation for dependable workmanship, we serve homeowners, businesses, and contractors throughout Branch, Hillsdale, Jackson, Lenawee, Monroe, St. Joseph, and Washtenaw Counties.

We specialize in professional septic system and excavation services, offering reliable solutions for both residential and commercial projects. From new system installations and replacements to repairs, site preparation, and excavation work, our experienced team is fully equipped to handle jobs of all sizes with precision and care.

For your peace of mind, we are fully licensed and insured, and we stay up to date with all local and state regulations. When you choose DeJonghe Septic & Excavation, you can trust that you’re working with a knowledgeable, reliable team committed to getting the job done right the first time.

Contact us today to learn more about our services or to request a quote—we look forward to serving you.

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Our Services

    • Septic inspections

    • Septic tank locating

    • Septic riser installation

    • Emergency septic services

    • New septic system installation

    • Septic system replacement

    • Camera inspections (sewer & septic)

    • Residential drain cleaning

    • Commercial drain cleaning

    • Hydro jetting

    • Grease line cleaning

    • Floor drain cleaning

    • Storm drain cleaning

    • Preventative maintenance programs

    • Underground utility work

    • Site preperations & grading

    • Footings & foundations

    • Driveway removal & replacement

    • French drains

    • Erosion control

The DeJonghe family has proudly served the septic and drain field industry since 1937. With generations of experience, we specialize in a full range of septic, excavation, and site development services.

We are a licensed and insured Michigan contractor and a trusted name in septic system replacements. As a family-owned and operated business, we are committed to quality workmanship, dependable service, and long-lasting solutions for every project.

About Our Company

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  • “I can say we will be life long customers. The quality workmanship from Eric was amazing. They were very fast in getting in contact with and were always very timely with any response to questions. They made sure to take good care of the yard and paid great attention to detail while working. It has been an absolute pleasure to work with Eric and I would highly recommend him to anyone needing septic work done. He is fast, efficient, honest, and take pride and integrity in his work. We will be looking to them for any future projects we may have!”

    —Tyler H.

  • “Eric and his crew are very professional, time management and always ready to go the extra mile for his customers. With that said, if I need any future work done, I will be calling DeJonghe Septic and Excavation.”

    —Josh K.

  • "Every detail was thoughtfully executed. We're thrilled with the outcome."

    —Kate