Licensed Septic Contractors Based in Longmont, CO

30 licensed septic contractors based in Longmont. Every license number below is sourced from public licensing records, with a link to look it up yourself.

"Based in" is the city on the business's license record. That can be a mailing address; it doesn't tell you where the business works. Businesses based in nearby towns may also work here.

Browse Longmont by service

Own one of these businesses? Find your listing and claim it.

Also in Longmont: radon testing and mitigation (8)

Looking for a specific contractor? Search by name, business name, or license number.

Services in Longmont, with national cost ranges

Listings based in Longmont whose license class covers each service. Cost ranges are national; each links its cost guide.

None of the listings based in Longmont hold a license class we can match to septic system design or perc test and soil evaluation. Ask any contractor whether they do this work, or browse the listings based in Boulder County.

Hiring a septic contractor in Longmont

Before you hire, confirm the license is still active with the agency that issued it and get at least three written quotes.

Homeowner guides

• What Is a Septic Tank and How Does It Work?
• Do I need a permit for well or septic work in Colorado?

Nearby cities