Selling a home with a well in Colorado?
No single law requires a well test at sale. County programs, the buyer's lender, and state transfer paperwork each have their own rules — see what applies, then get the test scheduled early.
- 11 Colorado counties covered
- Every requirement linked to its official source
- Verified July 2026
How it works
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Look up your county
A few counties require testing at transfer; most leave it to the buyer's lender. Start with where the property sits.
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See every rule that applies
County program, lender checklist, and the state's change-of-owner filing — in plain English, with the official source next to each.
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Request a test or inspection
Get connected with a local well professional who samples, tests, and documents wells for closings.
Why well sales get stuck
Nobody agrees on whether a test is 'required' — the county says one thing, the lender's checklist says another, and the internet says both.
- Lab results take days and closings don't wait. A coliform surprise in the final week can stall everything.
- The state's well transfer filing is free and takes minutes — but when the title company skips it, the permit quietly stays in the old owner's name.
Start with the rules
Find your county
Rules differ by county. Find yours for the exact requirement, fees, and inspectors: