Perc Test & Site Evaluation
A perc or soil test tells the designer how fast your soil accepts effluent, which sets field size and type. Expect $600–$2,000.
- Replacement typically $3,000–$15,000 (avg $7,900, HomeGuide)
- Mound, drip and aerobic systems $10,000–$20,000+
- Free quotes from licensed local installers
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Typical national cost$3,000 – $15,000Cost guide →About Perc Test & Site Evaluation
A perc or soil evaluation tells the designer how fast your soil accepts effluent, which sets how big the drain field must be and which field types are allowed. Expect $600–$2,000 (HomeGuide). Angi cites about $1,300 on average, and theseptic.guide lists $500–$2,000 for perc plus site evaluation. In some counties the health department does the evaluation for a permit fee.
We connect homeowners with licensed evaluators, designers and contractors who handle site evaluations in your county. The test result is the input that sizes your system and sets the cost.
Common Jobs We Route
- Perc test
- Soil-profile/site evaluation
- System design (engineered/professional)
- Repair-site evaluation
What Affects the Price
Providers quote their own work — these are the factors that consistently move the number.
- State (who may perform it)
- Number of test holes
- Equipment/backhoe access
- Engineered design needed
Perc Test & Site Evaluation FAQs
How much is a perc test?
$600–$2,000 (HomeGuide). Angi averages about $1,300.
Do I need a perc test to replace a drain field?
Usually some soil evaluation is needed because the new field is sized to the soil.
What if my lot fails?
Designed systems (mound, drip, ATU) are the usual fallback. Use the cost-by-type table on our cost guide.
Perc Test & Site Evaluation by Area
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