Septic (OWTS) Rules in Fremont County, Colorado

Why the Building Department, and what that means for you

In most Colorado counties, septic (onsite wastewater treatment system, or OWTS) permitting sits with a public-health or environmental-health agency. Fremont County structures it differently: its Building Department administers the county's own OWTS regulations, with environmental-health staff assisting on a request basis rather than running the program. If you search for "Fremont County septic" and land on a public-health or environmental-health contact page, don't assume that's the office that issues the permit -- confirm you're talking to Building, since that's the department with permitting authority here.

The county adopted a revised version of its OWTS Regulations, and as of this review the most current version in circulation is titled as a 2026 adoption. Older PDFs and third-party summaries of Fremont County septic rules may reflect a prior version of the regulations -- if you find guidance online that doesn't match what the Building Department tells you directly, treat the county's current document as controlling.

The permit process: site evaluation, soil test, and licensed installation

A new-system or repair permit application starts with a site evaluation to confirm the soil and site conditions can support the proposed system, paired with a soil test and a system design describing the type of system being installed and its site plan. The Board of Health sets OWTS permit fees under the regulations, capped at what's needed to cover the program's actual direct and indirect costs -- but the specific current fee amount isn't published in a single easy-to-find schedule, so confirm the exact cost directly with the Building Department before budgeting for a new installation or repair.

Installation has to be carried out to the standards in the county's OWTS regulations, and a completed system needs to pass the Building Department's inspection process before it can be put into service. If you're planning new construction on a parcel without existing sewer access, build the septic site evaluation into your due-diligence timeline early -- soil conditions across Fremont County vary meaningfully with terrain, and a site evaluation that comes back unfavorable can change what's buildable on a specific parcel.

Buying or selling a property with an existing system: the transfer-of-title inspection

Fremont County's OWTS regulations include a dedicated transfer-of-title inspection section, meaning a septic system's condition is something the county has built into its regulatory framework for a change of ownership, not just an optional item a buyer might request. If you're purchasing a property served by an existing OWTS, ask the Building Department directly what the current transfer-of-title inspection requires -- who can perform it, what it costs, and how it fits into your closing timeline -- rather than assuming the process mirrors what you may have seen in another Colorado county, since the specific requirements and any recent fee changes are the kind of detail that gets revised alongside the broader regulation.