How much does perc test cost?
A percolation test measures how fast soil absorbs water — it decides whether land can support a septic system and which kind. Essential due diligence before buying rural land; failed perc = often unbuildable.
| Typical range | $450 – $2,000 |
| Most common | $900 |
| Priced | per test |
| DIY-friendly? | No — best left to a licensed pro |
What changes the price of perc test
- Number of test holes required
- County health department fees
- Engineer vs. county-conducted test
- Site access for equipment
Estimate your cost
Adjust the quality and scope, or compare with other projects.
Full typical range for this project. Adjust the quality/scope for a tighter estimate. The only way to know your real price is to get quotes from local contractors.
- ›Number of test holes required
- ›County health department fees
- ›Engineer vs. county-conducted test
- ›Site access for equipment
National ballpark ranges for the US. Not a quote — actual prices vary by region, home and contractor.
Perc test cost — frequently asked questions
How much does a perc test cost?
A perc test runs about $450–$2,000, around $900 typical including county fees. It's a small price before buying land — a failed perc can make a lot unbuildable or force a $20,000+ engineered system.
What happens if land fails a perc test?
You may need an engineered/mound septic system (much pricier), a redesign, or in the worst case the lot can't be built on. Always make land purchases contingent on a passing perc test.
Related project costs
This is general US cost information, not a quote. Actual prices depend on your region, home, materials and contractor — always get quotes from licensed local pros before you commit.