Texas
$200–$1,000
In Texas the site evaluation for an OSSF (on-site sewage facility) is performed by a licensed site evaluator or professional engineer; cost varies with soil analysis vs. soil borings.
Direct answer
A perc test typically costs $150–$1,500
A perc test — more precisely a septic soil/site evaluation for an on-site wastewater system — typically costs $150–$1,500 in the U.S., depending on state, county, soil conditions, lot size, and how many test locations are needed. In Texas it commonly runs $200–$1,000, in Tennessee $150–$800, and in North Carolina $150–$900.
This is a planning range, not a quote — and a passing test is one input toward a septic permit, not permission to build. The county makes that decision.
Last updated: 2026-07-09. Screening-grade planning ranges compiled from public sources — not a quote or fee schedule.
By state
Perc test cost by state
| State | Typical range | Who performs / reviews it | Verify with |
|---|---|---|---|
| Texas | $200–$1,000 | Licensed OSSF site evaluator or PE; reviewed by the county/authorized agent under TCEQ rules. | TCEQ OSSF program |
| Tennessee | $150–$800 | TDEC Environmental Field Office or licensed soil scientist / installer. | TDEC subsurface sewage disposal |
| North Carolina | $150–$900 | County Environmental Health (Health Department); licensed soil scientist for evaluations. | NC DHHS on-site water protection |
Ranges are typical planning figures as of 2026-07-09 and vary by county and site. Confirm current costs with a local evaluator and the county authority.
Tennessee
$150–$800
In Tennessee, soil site evaluations for subsurface sewage disposal are reviewed by the TN Dept. of Environment & Conservation (Division of Water Resources) or a licensed soil scientist.
North Carolina
$150–$900
In North Carolina the soil/site evaluation and septic permit are handled by the county environmental health department under NC DHHS rules.
What drives the price
Why quotes differ
- Number of test locations and soil borings required.
- Soil type, slope, wetness, and depth to restrictive layers.
- Parcel size and travel distance to the site.
- Whether an engineer or licensed soil scientist is required.
- Local authority review process and re-test rules.
What this cost does not buy
A test is not a permit
Paying for a perc test does not guarantee a passing result, a septic permit, or the right to build. It evaluates soil suitability at specific spots for a specific plan. Access, zoning, floodplain, and setbacks are separate — and the county issues the actual approval.
Decision framework
How to use this before you buy
- Order your own evaluation if your plan depends on a septic system — do not rely on the seller’s old test.
- Ask the local authority whether any prior result still applies to your intended use and parcel boundaries.
- Budget the test alongside the full septic install and the rest of your development costs.
- Walk away, or re-price, if soils fail and alternative systems are unclear or unaffordable.
FAQ
How much does a perc test cost?
A perc test or septic soil/site evaluation typically costs $150–$1,500 in the United States, depending on state, county, soil complexity, lot size, and whether the evaluator uses soil analysis or soil borings. It is a planning range, not a quote.
Why do perc test prices vary so much?
Price depends on who performs the evaluation (a licensed site evaluator, professional engineer, or soil scientist), how many test locations are needed, soil and slope conditions, travel to the parcel, and how the local authority reviews results. Difficult soils and larger parcels push costs up.
Who pays for the perc test, the buyer or the seller?
It is negotiable. Buyers often pay for their own evaluation during an option or due-diligence period so the result is tied to their intended use and current parcel boundaries — not a years-old test the seller references.
Is an old perc test still valid?
Not always. A prior result may be tied to a different location on the parcel, a different intended use, older standards, or may have expired under local rules. Ask the local authority whether a prior evaluation still applies before relying on it.
Does a passed perc test mean I can build?
No. A passing soil/site evaluation is one input toward a septic permit. Access, zoning, floodplain, setbacks, and other requirements still apply, and the county — not the test alone — decides permitting.
Related cost guides
Septic system cost
Well drilling cost
Cost to run utilities
Land development cost estimator
Septic & perc, before buying
All land cost guides
What Before You Buy Land is
- A source-cited parcel pre-screen that organizes public-source signals — access, septic/perc records, flood, wetlands, soils, slope, utilities, restrictions, and local authority paths — into plain-English buyer questions.
- A first-pass screening tool that helps rural land buyers in Texas, Tennessee, and North Carolina decide what to verify before they make an offer.
What it is not
- Not legal advice, a survey, title opinion, engineering review, or appraisal.
- Not a septic, permit, zoning, or county approval — and not a guarantee that land is buildable.
- Not a replacement for county confirmation or a licensed professional. It points you to the right office and question.