Selling a home with a septic system in Colorado?
Many Colorado counties require a septic inspection before closing. Find your county's exact rules, fees, and licensed inspectors — and get it scheduled before it delays your sale.
- 21 Colorado counties covered
- Every fact linked to its official county source
- Verified July 2026
How it works
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Look up your county
Colorado septic rules are set county by county. Start with yours.
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See exactly what's required
Fees, forms, inspector rules, and deadlines — summarized with the county source linked.
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Request an inspection
Get connected with a licensed local inspector serving your county.
Why sellers get caught off guard
The requirement varies county by county — your last sale may have had completely different rules.
Inspections can't happen once snow covers the ground in some counties, so timing matters more than you think.
A failed system found late can delay or derail a closing entirely.
Find your county
Rules differ by county. Find yours for the exact requirement, fees, and inspectors:
Adams County Use / Transfer of Title Permit (OWTS) Arapahoe County Transfer of Title / Use Permit (OWTS) Archuleta County Transfer of Title (Acceptance Document) Boulder County Property Transfer Certificate (OWTS) Broomfield County Transfer of Title Permit (OWTS) Clear Creek County Use Permit (Transfer of Title Inspection) Douglas County Use Permit (Transfer of Title Inspection) — OWTS Eagle County OWTS Adequacy Review (OAR) Permit El Paso County Property Sale Acceptance Document (Transfer of Title Inspection) Elbert County Use Permit (Transfer of Title) Gilpin County Use Permit (Title Transfer) Gunnison County OWTS Transfer of Title Acceptance Document Jefferson County Use Permit Program (OWTS) La Plata County Continued Use Permit (formerly Transfer of Title Acceptance Document) Lake County Transfer of Title (TOT) Use Permit Larimer County Transfer of Title Program (OWTS Acceptance Document) Mineral County OWTS Transfer of Title (Acceptance Document) Park County Transfer of Title (OWTS Acceptance Document) Pitkin County OWTS Use Permit Pueblo County Transfer of Title Program (Acceptance Document) Summit County OWTS Use Permit (point of sale)