Septic Installation Contractors in Longmont, CO

Septic Design, Installation & Repair Services

Ace Septic & Excavation is a local septic contractor serving Boulder and Weld Counties. Having worked in these areas for years, we bring familiarity with their permitting processes, Longmont-area soils, and local requirements surrounding a new or replacement septic system.

Septic Tank & Drain Field Installation in Longmont

Engineered for Front Range Properties. Efficiently Permitted. Made to Last for Decades.

Ace Septic & Excavation is a full-service septic installer and septic repair contractor. Our installation process includes:

Site Evaluation & Soil Analysis

We assess your property's soil, slope, and available space to determine what type of septic system and drain field will work for your site.

Septic System Design

We determine the appropriate system layout and specifications based on your property’s conditions, local requirements, and the results of your site evaluation.

Septic Permitting

We handle septic permit applications and required documentation, coordinating with the local health department to secure the necessary approvals for your project. Permit fees are included in your price.

Excavation

We prepare the site and excavate the areas needed for your tank, drain field, and connecting pipes according to the approved plans.

Septic Tank & Drain Field Installation

We install your full septic system according to the approved design, and coordinate all required inspections.

System Connections & Backfilling

We connect the necessary pipes and system components, then backfill the excavated areas once required inspections are complete.

Septic System Cost in Longmont

Planning a septic project starts with knowing what to budget. From the tank and drain field to the permits and site prep, our 2026 Septic System Cost Guide breaks down typical estimates for septic installations and repairs in Northern Colorado.

Septic System Repair in Longmont

When your system has a failing tank, damaged drain field, or a problem that requires major excavation, the repair can involve more than a quick fix. We handle those larger septic repairs and replacements for Longmont property owners who need a lasting solution to serious system problems.

Our septic repair services include:

From Our Clients Near Longmont, CO

“Thank you for getting our replacement septic system installed without any hassles.”

— Robert H.

“Travis and his crew took all the hassle out of this huge project—couldn’t have hired a better company! ⭐️⭐️⭐️⭐️⭐️”

— Elizabeth H.

“We had such a great experience with this company. I cannot recommend them enough. Such great communication (somehow hard to come by these days), friendly service, and great work! Thanks for making things easier, I really appreciate it!”

— Andrea S.

“They are fast, efficient, I couldn’t have asked for better service!”

— Ry & Tay

“We are incredibly thankful for the employee who came out late at night to help us with our issue. Even though their role is typically exterior-only, they didn’t hesitate to come right away and guide us in the right direction. That level of dedication and kindness truly means a lot to us. We can’t thank them enough!”

— Stephanie M.

Featured Project

Septic Design & Installation in Pierce, CO

Foundation excavation, backfill, septic design, and septic installation.

Get a free inspection and estimate on your septic project.

Whether you’re installing a new septic system or noticing the signs of a failing system, our services are designed to help you find your perfect solution.

Find out what’s needed with a free estimate.