Land Buying1 min read

Stop Assuming Perc Test Results Mean What You Think

Addie Farren

3 days, 17 hours ago

👁 41 views💬 2 replies

I almost bought a seven-acre parcel in Burke County last year based on a passed perc test the seller provided. What I didn't know — and nobody told me — is that perc tests in NC can be done under temporarily favorable soil moisture conditions, and a test from two wet springs ago might not reflect what the county health department will actually approve when you apply for your septic permit today. Different evaluators, different seasonal conditions, different outcomes. The seller's test was real, but my permit application got flagged for a completely different soil profile section than what the original evaluator assessed. I walked away, but only after burning $800 on my own soil scientist. In western NC specifically, slope and soil variability between test pits on the same parcel can be dramatic. A passed perc test is a starting point, not a green light. Has anyone else had a county health department contradict a previous perc evaluation on the same parcel, and did you use it to renegotiate or did you just walk?

#perc test #septic permits #land buying #western NC #due diligence

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2 Replies

Gus Timberlake

3 days, 11 hours ago

You're right that a single perc test isn't a purchase guarantee — learned that lesson watching a neighbor lose his earnest money years back. But I'd push back on blaming seasonal moisture alone. In my experience the bigger variable is evaluator discretion on soil morphology interpretation. Two qualified evaluators can look at the same redoximorphic features in a horizon and disagree on seasonal high water table depth. Always request the actual soil profile description, not just the pass/fail result.

Priya Sundaram

3 days, 5 hours ago

Texas Hill Country here — same trap exists with different wrapping. My sandy loam passed a standard perc test, but when I applied for my aerobic septic system permit, the county evaluator flagged a caliche hardpan layer about 18 inches down that the original test completely missed. Caliche is notorious for creating perched water tables that don't show up seasonally. Always insist on a full soil profile description, not just pass/fail results.