Land Buying1 min read

Stop Trusting Perc Test Results From the Seller

Rosalie Dunkert

3 days, 23 hours ago

👁 37 views💬 2 replies

I changed my mind hard on this one. Before I leased my current place, I was seriously looking at a five-acre parcel with a 'passed perc test' noted right in the listing. The seller had documentation, looked official, and I almost skipped paying for my own. Thank goodness I didn't.

Western NC red clay drains completely differently depending on slope position, season, and what sat on that land before. The seller's test was done in August after a dry stretch. My independent test in March told a totally different story about where a future septic could even go — which would have gutted my infrastructure options entirely.

If you're buying land with any intention of putting a structure, wash station, packing shed, or dwelling on it, pay for your own perc test conducted in the wettest season you can manage. Don't let a seller's documentation feel like a substitute for your own due diligence.

Anyone else found that seasonal timing on perc tests swings wildly in their region, or is this more of an Appalachian clay problem?

#perc test #rural land buying #septic systems #beginning farmers #due diligence

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2 Replies

Gus Timberlake

3 days, 13 hours ago

Solid warning. I'll add the opposite seasonal trap from the Ozarks: buyers here sometimes get burned by spring perc tests on cherty limestone ground. That gravel-laced soil drains fast in March, passes easy, looks great on paper. Come August when clay subsoil swells and that thin topsoil bakes hard, the drainage picture flips entirely. Same parcel, two completely different verdicts depending on when you test. Always pay for your own test, different season from whatever the seller shows you.

Priya Sundaram

3 days, 8 hours ago

This is so real, and I want to add a wrinkle people don't talk about: even a legitimate, independent perc test can become meaningless if the parcel has deed restrictions limiting where structures can be placed. On my Hill Country search, I found a five-acre lot with a passing test, but the buildable envelope after setbacks and easements left exactly one possible septic location — which sat over a documented buried fuel tank from a previous ag operation. Test passed. Site was still unusable.