If you sell a Larimer County home on a septic system, a NAWT-certified inspector licensed by the county must inspect it and file a report with the health department before closing. If it passes, the county issues an Acceptance Document that is good for 12 months. New systems approved within the last three years and non-arm's-length transfers (family, inheritance, foreclosure) are exempt.

Inspection at sale	Required before the real estate transaction closes; a certified third-party inspector's report must be submitted to LCDHE.
County fee	$120.00 (Transfer of Title — Acceptance Document) source ↗
Inspector requirement	Third-party inspectors certified by the National Association of Wastewater Technicians (NAWT) and licensed by Larimer County.
When to apply	Before closing; the inspection report must reach LCDHE before the transaction is finalized.
Validity	Acceptance Document is valid for 12 months from the inspection date.
Winter rule	If snow, frozen ground, or lack of access prevents a full inspection, a Conditional Acceptance Document may be issued.
If the system fails	The seller completes permitted repairs, or the buyer assumes responsibility via an Agreement to Repair, with repairs completed within 180 days of closing.
Exemptions	Not required if the system received final approval less than 3 years ago, or for non-arm's-length transfers (family transfers, estate settlements, foreclosures, adding/removing a joint owner where one party is the original owner or their spouse/parent/child, transfer to a trust/LLC with the original owner).

County application / forms

Verified July 2026 · Source: Larimer County Environmental Health — Transfer of Title Program