Do You Need a Septic Permit in Larimer County, Colorado?

The short answer

If you're installing a new on-site wastewater treatment system (OWTS) or replacing an existing one in Larimer County, plan on working through the county's permit and inspection process before construction. A repair may also need approval depending on the scope. Don't assume an existing tank or an old permit automatically covers the work you want to do.

The applicable rules depend on the parcel and the project. Start with the Larimer County OWTS program to confirm current requirements and application details before you commit to a design or a start date.

What goes into a septic permit?

For a new system, the process generally begins with a site and soil evaluation. The location, soil conditions, groundwater considerations, available space and proposed home all affect the design. The county reviews the submitted plans before installation and inspects the work at the required stages.

1. Confirm jurisdiction. Find out which county oversees the property. A Loveland mailing address does not always tell you which county will issue the permit.
2. Evaluate the site and soil. Ask the county what test pits, professional evaluation and supporting documents apply to your project.
3. Prepare the design and application. The proposed system must fit the site conditions and current requirements; some projects need an engineered design.
4. Get approval before digging the installation. Allow time for review and coordinate excavation with the approved plan.
5. Schedule required inspections. Don't backfill components that must be inspected until the applicable inspection has been completed.

What affects the timeline and budget?

Soil evaluation, design revisions, permit review, weather and inspection scheduling can all change the sequence. Rocky mountain lots around Red Feather Lakes can require different access and excavation planning than open lots closer to Loveland. Ask for an estimate that separates evaluation and permit costs from installation work. Our Colorado septic installation cost guide explains the main pricing factors without treating every lot as identical.

Before any excavation, coordinate utility locates through Colorado 811. Privately owned lines may require a separate private locate.

Planning an installation in Northern Colorado?

Jake's works on septic installations and excavation in Loveland, Fort Collins, Red Feather Lakes and surrounding Northern Colorado communities. We can talk through your site, the work involved and the next steps without pretending a permit decision can be made from a web page. See our septic installation service in Loveland or full service area.