Perc Test Cost: What You Can Actually Know Before Getting Quotes

There is no honest national answer.

A person asking this question in Indiana needs a soil scientist to perform an on-site soil evaluation. Indiana does not use a percolation test at all. A person in Missouri may need a literal percolation test or a soil morphology evaluation, depending on what the permitting authority requires. A person in Georgia is usually asking for a Level III Soil Report. These are not interchangeable products, even though people call all of them a "perc test."

Costs may involve one or two payees. A government agency may charge an application, review, or permit fee. A private evaluator adds a second bill when private work is required or chosen. That work may include fieldwork, a report, design, excavation coordination, or permit submission. Combining unlike charges into one national number hides the most important budgeting question: what exactly is included?

The useful answer is not an average. Start with the published government charges for the applicable permit path. Add written quotes when private work is required or chosen.

First separate the two parts of the bill

1. The government fee

Published government charges are often the easiest component to verify, but they may be unpublished, locally variable, or split across multiple stages. Some states use one statewide amount. Delaware posts a $250 site-evaluation review fee. South Carolina charges a $150 site-evaluation fee. Arkansas uses a statewide residential plan-review schedule of $30 to $150 based on structure size.

Other states leave more to local government. Missouri examples are $90 in Moniteau County, $150 in Monroe County, and $510 in Boone County. Those are three county charges, not a Missouri range or average. Alabama is even more variable in the two published county examples found: Mobile County lists $200 for a residential permit plus a $30 initial request fee, while Jefferson County lists $1,023 for a new system, repair, or addition.

The label matters. A fee called "site evaluation" may pay for agency work or review. A construction-permit fee does not necessarily buy the private soil report needed to support the application. North Carolina's Brunswick County schedule even has a separate $350 administrative line for using a Licensed Soil Scientist. That is the county's charge, not the scientist's fee.

2. The private evaluator's fee

Private pricing was absent from most of the named operator sites checked, and the evidence does not establish its usual size. Ask each evaluator to price the exact method and scope your property requires.

That is not a reason to substitute an aggregator estimate. For those sites, pricing remained quote-only. The research checked seven real Maine operators and found no current published price. It checked four in Arkansas and found none. Five accessible Tennessee operator sites showed no price, while a sixth site could not be evaluated. Alabama, South Carolina, Delaware, and North Carolina showed the same basic pattern.

When a real operator does publish a price, treat it as one operator's offering. It is not a statewide market rate. In Indiana, Cool Soil Consulting posted $650 for its Residential Standard service and $1,300 for Residential Moraine service as accessed July 16, 2026, with soil-pit digging excluded. In Vermont, Hogg Hill Design posted $500 per lot for a feasibility study as accessed July 16, 2026. That is preliminary feasibility work, not a full design-and-permit package.

Rhode Island shows why scope controls price. Foster Survey Company's schedule, accessed July 16, 2026, listed Bronze at $1,600 for application work and two test pits, with the customer supplying the $150 RIDEM fee and backhoe. Silver was $1,750 and included the government fee but not the backhoe. Gold was $5,000 and included backhoe service. Those are three packages from one company, not three estimates of the same task.

Cost evidence by state

The government column gives a specific published schedule or named local example. It does not claim that the listed fee is the complete government total for every project. The operator column includes only named, dated prices accepted by the underlying research.

State	What the evaluation is called	Published government fee evidence	Known operator pricing
Virginia	Soil evaluation, with a perc test only as a secondary tool when required	VDH: $225 construction permit for onsite sewage with OSE or PE documentation under 1,000 gpd; $425 without that documentation. Accessed July 15, 2026.	Soils, Inc.: services start at $1,000. One Virginia operator, accessed July 15, 2026.
North Carolina	Soil or site evaluation, not a literal perc test	Bladen County: $300 Improvement Permit and $100 Construction Authorization under its 2025 schedule. County example only.	Not published on the first or second operator site checked.
Georgia	Level 3 Soil Survey or Level III Soil Report	Cobb & Douglas Public Health: $110 new-installation site review plus $250 inspection and permit. Accessed July 15, 2026.	Not published by any named operator. Secondary Georgia-specific content sites cite a $400 to $800 range for a Level 3 survey, but no named operator publishes a figure directly.
Missouri	Percolation test or soil morphology site evaluation, as the authority decides	Moniteau County $90, Monroe County $150, Boone County $510. Three separate county examples, accessed July 15, 2026.	Show Me Soils: $350 to $550 depending on location. One operator, accessed July 15, 2026.
Maine	Site evaluation using observation holes and soil profiles	Maine CDC: $250 base fee plus a $62.50 administrative fee and a $15 Water Quality Surcharge, totaling $327.50 for a complete non-engineered system before possible local additions.	Not published. Seven named Maine operators checked, none with a current price.
Tennessee	State site evaluation, soil map, or percolation test depending on the property and permit path	Tennessee's state-direct schedule: $400 for a conventional permit up to 1,000 gpd, plus $100 for construction inspection. Accessed July 16, 2026.	Not published. Five accessible named operators checked gave no price; one additional site was inaccessible.
Alabama	Site evaluation using an allowed method, including perc testing or soil morphology	Mobile County: $200 residential permit plus $30 initial request. Jefferson County: $1,023 for a new system, repair, or addition. County examples accessed July 16, 2026.	Not published. Three named Alabama operators checked gave no price.
South Carolina	SCDES Site Evaluation, not a literal perc test	SCDES statewide site-evaluation fee: $150.	A Department-contracted PSC may charge no more than $450. A privately hired PSC is not subject to that ceiling. Soil & Forestry Services, Davis Horizons, and the contracted PSC named on the SCDES program page published no private rate.
Delaware	Site evaluation by a Class D soil scientist	DNREC site-evaluation review fee: $250, accessed July 16, 2026.	Accent Environmental published process details but no price; no usable second operator price was obtained.
Indiana	On-site soil evaluation, not a perc test	Adams County: $100 permit. Monroe County: $250 new residential permit. County examples accessed July 16, 2026.	Cool Soil Consulting: $650 Residential Standard, $1,300 Residential Moraine; pit digging excluded. One operator, accessed July 16, 2026.
Rhode Island	Soil evaluation for OWTS suitability	RIDEM's fee rule: $150 per system for the soil-evaluation stage. A separate new-construction or alteration application is $150 for a single-family residence, with commercial tiers of $200, $500, $1,000, or $2,000 by flow. A $100 suitability determination or $100 wet-season determination may also apply.	Foster Survey: Bronze $1,600, Silver $1,750, Gold $5,000, with different fee and backhoe inclusions. One operator, accessed July 16, 2026.
Vermont	Soil evaluation using excavated test pits	State permit tier for 560 gpd or less: $306.25 per application. Higher flows use higher statutory tiers.	Hogg Hill Design: $500 per lot for feasibility only, not full design and permitting. One operator, accessed July 16, 2026.
Arkansas	Percolation test by a DR, or seasonal-water-table evaluation by a Soil Qualified DR	Statewide plan review: $30 to $150, set by structure size.	Not published. Four named Arkansas operators checked gave no price.

Why national cost pages get this wrong

• Mismatched evaluation types: Indiana, Maine, Rhode Island, South Carolina, and Vermont do not use the timed water-drop test described by generic perc-test pages. Georgia's normal permitting document is a Level III soil report.

• Non-comparable scope: A quote may cover field observations only, a report, design, permit submission, test-pit excavation, or several of those items. Foster Survey's Rhode Island packages show how backhoe responsibility changes the posted price.

• Weak sourcing: The Missouri research found that ProMatcher's displayed samples were reported in 2018. The national pages checked did not identify a dated local operator transaction behind their headline figures.

A precise-looking national number therefore answers the wrong question. A defensible budget starts with the correct state process, the published agency or county charge, and comparable written quotes that define the same scope.

How to request quotes you can compare

Tell each evaluator the property address, parcel size, proposed bedroom count or design flow, whether the lot is part of a subdivision, and anything known about access, slope, rock, wet areas, or previous evaluations. Then ask for the same items in writing:

• What field method and how many borings, pits, or test holes are included?
• Who supplies and pays for a backhoe or other excavation?
• Does the price include the report, septic design, application preparation, and agency responses?
• Are government fees, travel, staking, surveying, or repeat visits included?
• What could trigger additional work, and how would it be priced?

Without those answers, two quotes may describe different products.

FAQ

Why won't evaluators quote a standard price online?

The required work changes with state rules and site conditions. Access, excavation, number of proposed areas, soil complexity, design scope, and travel can all change the assignment. In this research, most named operators checked across these states published no price.

Is the government fee the whole cost?

Usually not when a private evaluator is required. Delaware's $250 charge is DNREC's review fee, separate from the Class D soil scientist's work. South Carolina's $150 fee is paid to SCDES even when the applicant separately hires a private Professional Soil Classifier. Always ask the agency what its fee covers.

Does lot size change the price?

It can change private scope, but acreage alone does not produce a reliable formula. A larger search area, multiple proposed homesites, difficult access, or more test locations may add work. Some states also have acreage-based permit exemptions, but those legal rules are state-specific and do not establish an evaluator's price.

Why does excavation matter so much?

Some states require test pits that need a backhoe. The quote may require you to arrange excavation or may bundle it. Foster Survey's Rhode Island tiers and Cool Soil Consulting's Indiana exclusion show why this must be clarified before comparing prices.

How many quotes should I get?

Get two or three from professionals authorized for the exact state and county process. Compare scope first and total price second. If one proposal omits excavation, design, or filing work, it is not directly comparable to a proposal that includes those items.