Wetland delineation cost in Ohio and what Ohio EPA charges for an isolated wetland permit

A wetland delineation in Ohio costs about $2,500 to $4,500 on a parcel under two acres, $4,000 to $6,000 at five acres and $6,000 to $14,000 on a 10 to 20 acre tract, and an Ohio licensed professional surveyor's map of the flagged line adds $1,200 to $4,000. The 2023 Sackett decision narrowed what the Army Corps regulates, but Ohio never relied on the federal definition alone: under Ohio Revised Code Chapter 6111, filling an isolated wetland still needs an Ohio EPA isolated wetland permit, which costs a $200 application fee plus $500 for every acre of wetland you impact, capped at $5,000.

So "the Corps says it is not federal" is not the end of the Ohio question. It is the start of a different one: which category is the wetland, how many acres will you fill, and what will the mitigation credits cost.

How much does a wetland delineation cost in Ohio?

Consultants price the field and report work by acreage and by how hard the wet to dry edge is to read. A Franklin County lot with a single drainage swale is a half day in the field. A wooded Hocking Hills or Geauga County tract with seeps, vernal pools and old ditches takes several days, and Ohio's glacial flats hide wetland hydrology in ways that depend on the season. The method is the same statewide: desktop review of soil maps, the National Wetlands Inventory and aerials, field data on vegetation, soils and hydrology, flags along the boundary, and a report written to the 1987 Corps manual.

The consultant and surveyor figures are market ranges for 2026; we did not find a published Ohio delineation price from a consultant or a public contract, so a quote far outside them is a reason to ask what the scope covers. The Ohio EPA numbers are not estimates. They come from Section 6 of the agency's Level One Isolated Wetland General Permit application instructions, which cite Ohio Revised Code 3745.113: a $200 application fee that must be paid in full at submittal, and a review fee of $500 per acre calculated on the proposed impact rounded to the nearest hundredth of an acre.

What does an Ohio isolated wetland permit actually cost?

It depends almost entirely on acres filled, because the review fee scales with the impact and the $200 is fixed. Three worked examples using the published formula:

State agencies, counties, townships and municipal corporations do not pay these fees. Everyone else does. The state fee is rarely the big number. Mitigation is: Ohio EPA's instructions say mitigation for Category 1 and non-forested Category 2 isolated wetlands, bought from an approved mitigation bank or an in-lieu fee program, is required at two times the area you fill, and at two and one-half times for forested Category 2 wetlands. Fill 0.3 acre of a forested Category 2 wetland and you are buying 0.75 acre of credits. Ask the bank for today's price per credit before you price the lot.

Does Ohio regulate isolated wetlands after Sackett?

Yes. Ohio Revised Code 6111.02 defines wetlands as areas inundated or saturated by surface or ground water often enough and long enough to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted to saturated soil, including swamps, marshes, bogs and similar areas delineated under the 1987 Corps manual. The definition does not ask whether the wetland touches a river. Chapter 6111 gives Ohio EPA authority to permit filling of isolated wetlands that fall outside Clean Water Act jurisdiction, and the agency says it administers that permitting for non-jurisdictional waters.

What Sackett changed is the federal half. A wet pocket that the Corps now declines to claim is still an Ohio wetland, and filling it still needs state authorization. You may deal with one agency instead of two, which can save time. It rarely makes the delineation optional.

What are Ohio wetland categories 1, 2 and 3?

Ohio sorts wetlands into three categories under Ohio Administrative Code 3745-1-54, usually scored with the Ohio Rapid Assessment Method. Category 1 wetlands are in poor condition with very low species diversity and are dominated by invasive species. Category 2 wetlands are in fair to good condition with moderate diversity and mostly native plants. Category 3 wetlands are in excellent condition, with high diversity and sensitive native species.

The category decides how hard the permit is. Ohio EPA's general permit covers filling Category 1 and Category 2 isolated wetlands totaling one-half acre or less, and the permit itself states that filling more than half an acre of Category 1 or 2 wetlands, or any Category 3 isolated wetland, is not authorized under it. Those projects need an individual permit, with a longer review and a tougher avoidance and minimization showing. A consultant who scores a borderline wetland as Category 3 can move your project from a routine registration to months of review, so ask for the ORAM score sheet and have it checked before you sign a purchase agreement.

How long does Ohio EPA take to review an isolated wetland permit?

For the Level One general permit, Ohio EPA has 15 business days for an administrative completeness review, and a 30 calendar day technical review starts when it tells you the application is complete. An application that stays incomplete for more than 60 days can be returned. Individual permits take longer. Add the delineation itself, usually one to two days of fieldwork and two to four weeks for the report, and book the work early: frozen ground and snow cover hide soils and hydrology from roughly December to March.

How to keep an Ohio wetland job inside budget

Before you buy, check the parcel against the National Wetlands Inventory and the county soil survey, and look for mapped floodplain. Hire one consultant to delineate to the 1987 manual and to score the wetlands, so the report serves Ohio EPA, the Corps if it still has jurisdiction, and the township or county planning office. Put a surveyor on the same calendar so the flags are located before they fade or get pulled, and order the boundary survey on the same visit if you need one anyway, because one crew mobilization for the flags and the lot lines costs less than two. Then work out what the buildable acres are actually worth after fees, mitigation credits and the setback the wetland takes out of the lot.

Put the delineation in the purchase contract as a contingency with enough time for Ohio EPA to answer, because a wetland line that arrives after your due diligence period ends buys you nothing.

Describe the parcel once above and we will match you with up to three licensed surveyors who work your county and coordinate with wetland consultants. For the national price picture see wetland delineation cost, for the consultant side the wetland delineation services page, and for a neighboring state with its own isolated wetland rules the Pennsylvania wetland delineation cost guide. Local surveyor coverage is on land surveyors in Ohio.