What Does a Seller Need to Know About Septic Systems in Gunnison County?

If your home is in unincorporated Gunnison County and has a septic system (called an onsite wastewater treatment system, or OWTS), plan for an inspection before the title transfers, and for the county to issue a transfer-of-title acceptance document. Winter does not have to stop a sale: the county has described conditional acceptance when snow or frozen ground blocks access. Confirm today's process with the county before you list.

The county's current OWTS page links its forms but does not spell out the rules, so the details below come from a June 2018 Crested Butte News report on the rule change. Rules, fees and forms can change. Confirm with Gunnison County Environmental Health. This is general information, not legal advice.

Does Gunnison County require a septic inspection when I sell?

According to the 2018 report, commissioners voted that, starting in June 2019, owners of buildings with septic systems in unincorporated Gunnison County must have the system inspected before the property's title transfers. The system must be functioning as designed before the county issues the transfer-of-title acceptance document. The report also said that properties in the Crested Butte watershed were already subject to inspections every two years.

The county's OWTS page says Environmental Health administers the county's on-site wastewater regulations in the unincorporated areas, that the Town of Pitkin and the Town of Marble have their own OWTS rules, and that it provides an "Application for OWTS Acceptance Document for Transfer of Title" and a transfer-of-title flow chart. If your home is inside the City of Gunnison or another town's sewer service area, a septic inspection may not apply, so confirm which rules cover your address.

How long is an inspection good for?

The 2018 report said a passing inspection is valid for two years. That helps if your first contract falls through and you go back on the market.

What if the system needs repairs?

The report described conditional acceptance. If repairs are needed, the county can issue a conditional acceptance if the buyer agrees to complete the repairs within 90 days of closing. Repairs have to be negotiated like anything else in the contract, so ask your agent how to handle cost and timing.

What if there is snow on the ground?

The report said that if snow or frozen ground blocks access to the system, the county can issue a conditional acceptance if the buyer prepays for an inspection and agrees to have it done once the system is accessible. In Gunnison County that is a real possibility for any sale between late fall and spring, so ask the county early how it would work for your sale. Locating and exposing the tank lid ahead of time, if you can, may also help the process.

Are any sales exempt?

Per the 2018 report, newly built systems and recently repaired systems (within four years) were exempt, as were transfers resulting from death or foreclosure. Ask the county whether your situation qualifies.

Who do I contact?

Gunnison County Community and Economic Development, which includes Planning, Building and Environmental Health, is at 221 N. Wisconsin St., Gunnison, CO 81230. The phone is (970) 641-0360, the email is planning@gunnisoncounty.org, and the page lists hours of Monday through Thursday, 8 a.m. to 5 p.m. The page also links a list of licensed septic installers and cleaners.

What else should I prepare before listing?

Septic is only one item. Here is a short seller checklist for a Gunnison County home:

• Septic records. Gather permits, pumping receipts and any prior inspection reports.
• Radon. Colorado's Seller's Property Disclosure form lists radon as a hazard to disclose if it is known or has ever existed, so gather any test results and mitigation records. See my radon guide.
• Well information. If you have a private well, have the permit number ready. Well permits come from the Colorado Division of Water Resources, not the county.
• Winter access. Keep the driveway and walkways clear for showings and make sure the number is visible from the road.
• Utility bills. Buyers in cold climates ask for 12 months of heating costs.
• Permits for additions. Missing permits slow a sale.

How is the Gunnison market right now?

For context, Redfin's Gunnison page (August 2026 data) showed a median sale price of $527,151 for the three months ending August, up 4.9 percent from a year earlier. In August, 21 homes sold, the median time on market was 42 days, and homes sold at about 96.7 percent of list price. Redfin's page said the average Gunnison home goes pending in about 47 days and sells about 4 percent below list. Redfin's county figures are small samples, so treat them as context rather than a prediction for your home. A pricing conversation with a local agent can use recent sales near you.

Does winter hurt my chances of selling?

It can slow showings, but serious buyers keep looking. The seller's job is to remove surprises: have septic and radon paperwork ready, make access easy and be flexible about inspection timing when snow limits what can be seen.

What is the bottom line?

Selling a home with septic in Gunnison County is manageable if you start early. Contact Environmental Health, find out how the transfer-of-title process works for your property and your timing, and build the inspection into your listing plan. A local agent can coordinate the pieces.

Frequently asked questions

Do I need a septic inspection to sell a home in Gunnison County?

In unincorporated Gunnison County, per the county's 2018 rule change, an inspection and a county acceptance document are required before title transfers. Confirm current details with Environmental Health.

How long is a septic inspection valid?

Two years, per the 2018 report.

What if the system is under snow?

The county has allowed conditional acceptance with a prepaid inspection once the system is accessible. Ask the county how it applies to your sale.

Who do I call?

Gunnison County Community and Economic Development at (970) 641-0360 or planning@gunnisoncounty.org.

Connect with a great real estate agent in Gunnison, Kelsey Loftis with Crystal Peak Properties.

Phone: (970) 784-6768 · Email: kelseyloftis@gmail.com · Website: crystalpeakproperties.com

Sources: Gunnison County Environmental Health, OWTS page (gunnisoncounty.org/140/Environmental-Health-OWTS), reviewed November 4, 2026; Crested Butte News, "The idea is to catch those failing systems and protect the health of citizens" (June 28, 2018); Boulder County, "Radon and Real Estate Transactions in Colorado"; Redfin Gunnison (August 2026 data). Not legal advice.