GroundRosterSeptic System Installation in Longmont, CO
24 of the 30 licensed listings in Longmont hold a Colorado license class that covers this work: they are licensed to build and install septic tanks and drainfields, and repair or replace failed ones. Not every well and septic professional is; see all Longmont listings for the full roster.
RST Services, LLCLicensed
Nixcavating, IncLicensed
Sullivan SepticLicensed
Colton HartfordLicensed
CAP Excavating & DemolitionLicensed
NoCo Septic, IncLicensed
Wt ExcavatingLicensed
Cap ExcavatingLicensed
Suc N Up, LLCLicensed
Cap Excavating, INCLicensed
Colton James HartfordLicensed
Suc N Up LLCLicensed
The ExcavatorLicensed
Creative Custom RenovationsLicensed
Sullivan Septic, LLCLicensed
Cap Excavating, IncLicensed
Joe Clark ExcavatingLicensed
Sullivan Septic LLCLicensed
Suc N Up LLCLicensed
Zeroline Excavating LLCLicensed
What does septic system installation cost?
A conventional septic system typically costs $3,600 to $12,500 installed. Alternative systems (aerobic, mound) for difficult sites run $10,000 to $20,000. Soil conditions drive most of the difference, which is why a soil or percolation test comes first.
Do I need a permit to install or replace a septic system?
Almost always. Your state or county health authority must permit new systems and most repairs, and the design has to match a soil evaluation of your site. Licensed installers usually handle permitting as part of the job; confirm it is included in the quote.
Before you hire
Confirm the license number on this page is still active with Colorado, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.