Perc Test Cost in Florida: What You'll Pay

Florida does not run a classic "perc test" so much as a site and soil evaluation for an onsite sewage treatment and disposal system (OSTDS, the state's name for a septic system). State law caps the public fee for a site evaluation at $40 to $115, and a private evaluator will usually cost more. A lot that fails costs you far more, because a lot that will not take a conventional septic system loses most of its buyers.

Quick check before you buy

1. 1.Confirm the lot has no sewer line in front of it. If sewer is available, the septic question may not matter. Ask the county utility.
2. 2.Look up the soil series on the USDA Web Soil Survey and note the depth to the water table.
3. 3.Check the lot size. Florida's baseline for septic on a lot without public water is at least one-half acre, with exceptions for older platted lots.
4. 4.Run the wetlands and flood zone checks. Wet ground is the usual reason a lot fails.
5. 5.Find out which agency permits septic in the county. It is not the same office in every county right now.
6. 6.Search for septic permits on nearby parcels. A neighbor with a permit and a house is good evidence.
7. 7.Make the offer contingent on a site evaluation, or price the lot as if it may fail.

What is a perc test for land, and is it the same in Florida?

A perc test (percolation test) measures how fast water drains through soil. Many states still use it to size a drainfield. Florida's rules look at more than drain speed. The state evaluates soil type and the wettest-season water table, and the statute says the evaluation of the seasonal high water table or soil suitability must be done by Department of Environmental Protection (DEP) personnel, registered professional engineers, or other people with expertise defined by rule.

When a Florida seller or buyer says "perc test," they usually mean a site evaluation that supports an OSTDS permit application. On this page, read it as "septic site evaluation."

Perc test for septic: what the state looks at

Chapter 62-6 of the Florida Administrative Code, "Standards for Onsite Sewage Treatment and Disposal Systems," holds the septic rules. Rule 62-6.006 is titled "Site Evaluation Criteria." Two things decide most lots.

Water table. The rule sets a required distance between the bottom of the drainfield and the wet-season water table. The rule requires the wettest-season water table to be at least 24 inches below the bottom of the drainfield (Fla. Admin. Code 62-6.006(2)), with a fill exception that still needs its own permits. Much of Florida has a shallow water table, so lots fail here most often.

Soil type. The same rule sorts soils by how limited they are. Clay, bedrock, hardpan, organic soil and similar material are on the severely limited side. Clean sand can fail too: sand with a high wet-season water table can count as severely limited.

When a fill or mound system, or a bigger lot, comes in

If the ground fails, the next step is usually an engineered or alternative system. Chapter 62-6 has a section for alternative systems (62-6.009), and the site evaluation rule discusses placing fill to raise the drainfield. We found no official price for these systems. Get written quotes from a licensed septic contractor for the specific lot.

The statute also sets lot size: it allows onsite systems on lots of at least one-half acre (with a 100 foot minimum dimension) under a daily flow limit, and lots platted before 1972 are not subject to the lot size requirement. Question small lots with no sewer.

Perc test cost: what the state publishes

The Florida Statutes set ranges for septic fees. Under section 381.0066(2):

These are allowed ranges, not a quote. The actual schedule is in Rule 62-6.030, Fees, which the rules site shows as amended in 2025 and 2026. We could not pull the schedule amounts, so call the permitting office. DEP also notes that in counties still run by the health department, the health department sets the total permitting fee, including any county fees.

What a private soil evaluator might charge

In DEP-run counties an applicant may have DEP do the evaluation or hire a qualified private site evaluator. No state agency publishes a price list for private evaluators. Published Florida cost guides put a site evaluation at roughly $150 to $300, and a privately ordered soil or perc test at about $600 to $2,000, with lot size and soil driving the price. Call two or three local evaluators and engineers for quotes, and ask whether the quote includes the report you upload with the permit application.

Who runs septic permits now: DEP or the county health department

Septic used to sit with the Department of Health. DEP's program page says that effective July 1, 2021, DEP is responsible for implementing the OSTDS statutes and rules. The handover is phased by county. DEP's permitting FAQ says DEP now permits in Northwest Florida and Marion County: the first group began January 2, 2025 and Marion County began July 1, 2025. The remaining counties are listed there as to be determined, pending the legislature.

So "perc test near me" has no single answer in Florida. See "Who to call" below.

Check it yourself, step by step: Marion County example

In Marion County (Ocala area), DEP rather than the county health department now handles permits.

Step 1. Read the soil on the USDA Web Soil Survey. Go to websoilsurvey.nrcs.usda.gov. The site is run by the Natural Resources Conservation Service and lets you define an Area of Interest and use the Soil Data Explorer to judge soil suitability for a use. Zoom to the parcel, draw the area of interest, and open the soil map tab for the soil series names. Report names change, so look in the Soil Data Explorer for the septic and water table reports. Treat them as a first look.

Step 2. Find the depth to the water table. In the Soil Data Explorer, look for the water features data for each soil series. A depth of a few inches to a couple of feet in the wet season is a warning. Soil maps are general. Use them to decide whether an evaluation is worth paying for, because they cannot replace one.

Step 3. Open DEP's septic program page. The page at floridadep.gov/water/onsite-sewage covers the program. DEP's permitting FAQ explains the application: the DEP form (DEP4015), a site plan, a floor plan, and submission through DEP's online portal or by mail.

Step 4. Contact DEP. The program office is in Tallahassee: Onsite Sewage Program, 2600 Blair Stone Road, MS 3596, Tallahassee, FL 32399-2400, phone 850-245-4070, email OSTDS_Feedback@FloridaDEP.gov. We found no Marion-specific office or number on DEP's pages. Ask them who handles Marion parcels and how a site evaluation is scheduled.

Step 5. Search permits on nearby parcels. Marion County's property appraiser site gives you the parcels around your lot. Septic permit records may sit with DEP now, and we could not confirm that the county's building permit search shows them, so ask DEP how to request records for nearby parcels.

Step 6. Check wetlands and flood zone. Run the wetlands check and the flood zone check before you pay for an evaluation.

What a failed lot costs you in resale terms

Most vacant land buyers want to build or place a home. A lot with no sewer and a failed septic site finds either no buyer, or a buyer who wants a discount to cover an engineered system.

Published cost guides put a conventional system at about $3,000 to $10,000 and a mound system at about $10,000 to $30,000 (mound vs. conventional costs). On a cheap rural lot, a gap of $7,000 to $20,000 can wipe out most of the lot's value to a buyer who plans to build. Get a written quote for the real lot before you use a figure like this in an offer.

Check zoning too, since county minimum lot sizes and allowed uses can add to the septic limits. See zoning designations.

Full price, discount or pass

• Sewer in the street, or a recent septic permit nearby on similar soil: full price, once the county confirms sewer availability or the neighbor's permit.
• Soil survey shows a shallow water table, no neighbor permits: discount. Make the purchase contingent on a site evaluation or price for the engineered-system risk.
• Written evaluation says the lot fails, or the lot is under half an acre with no exception and no sewer: pass unless the price reflects a lot that cannot be built.
• Wet ground in a mapped wetland: pass.

Perc test near me: who to call in your county

• Marion County and the Panhandle counties: DEP's Onsite Sewage Program, per the DEP permitting FAQ.
• Other Florida counties: the county health department, where DEP says applications go and the health department can do the site evaluation for a fee. The handover continues, so confirm on DEP's page before you call.
• Private evaluator or engineer: ask a licensed septic contractor or a local engineer who does site evaluations in that county.
• Title company or attorney: for easements and any recorded septic restrictions on the parcel.

Next step

The full checklist is in The Complete Land Due Diligence Checklist.