The drain field is where most of the money in a septic system sits and where most Marion County systems eventually fail. Sometimes the fix is small: a crushed line where a truck drove over it, a distribution box that has tipped and sends everything to one trench, roots from a live oak in the laterals. Sometimes the field has spent its life in groundwater and every trench is saturated. The crew diagnoses which before quoting, because the two answers are a thousand dollars apart from ten.

Replacement fields in Marion County are permit jobs. The onsite sewage program requires a site evaluation, and on small lots inside the springs protection areas the replacement usually has to be a system that reduces nitrogen, not a copy of the 1985 field. The crew handles the permit paperwork with the homeowner and builds what the permit says.

What a drain field repair job involves

Probe the field, open the distribution box and check the tank outlet to find where the failure is
Repair what can be repaired: lines, the box, the outlet filter, root cutting, a single trench
Where the field is done, a site evaluation and repair permit through the onsite sewage program
Build the replacement: conventional, mounded or nitrogen-reducing, as the permit requires
Final inspection with the permit office, then backfill, grade and seed

What's included

Diagnosis of the failure before any quote
Repairs to lines, boxes and single trenches where the field is worth saving
Permit application and site evaluation coordination for replacements
Replacement field built to the permit and inspected
Backfill and rough grading

Not in the price

Sod, landscaping and irrigation repairs after the dig
Tree removal where roots have taken the field
Electrical work for pump systems, done by an electrician

Drain fields in Marion County soil

Two soils, two failures. On the deep sands west of I-75 the field fails from the bottom up when the biomat seals the trench; the fix is often a new set of trenches beside the old ones on the same lot. In the flatwoods south and east of Ocala the field fails because groundwater rises into it every summer; the fix is a mounded or raised field that keeps the required separation from the water table, which costs more because of the fill and the pump; the separation is set by the state rule and confirmed at the site evaluation.

Inside the springs areas the permit office can require a nitrogen-reducing system on a replacement, and those run well above a conventional field. It is worth asking about that on the first call, because it changes the budget before anyone digs.

Drain Field Repair pricing in Ocala

Small repairs, a distribution box, a crushed line or an outlet filter, run about $300 to $1,200 in 2026. Field restoration by jetting or an aeration treatment, where the field is only partly sealed, about $1,000 to $2,500. A conventional replacement field in Marion County runs roughly $5,000 to $12,000 with the permit, a mounded field with a pump $9,000 to $18,000, and a nitrogen-reducing system more again. The firm number comes from the crew on the phone after the field has been probed and the permit office has said what it will accept.

Every replacement quote lists the permit fee, the site evaluation and the fill as separate lines so the homeowner can see what is county cost and what is labor.

Full price list and what moves the price →

Drain Field Repair questions, answered

How long does a drain field replacement take in Ocala?

Two to four weeks from the first visit, most of it waiting on the permit and the site evaluation. The dig and build are usually one to three days, and the final inspection a few days after.

Will the yard be destroyed?

The trench area and the truck path, yes, and they are rough-graded back. Sod and sprinklers are not in the price, and the crew will tell you before the dig which sprinkler heads to mark.

Can I keep using the house while the field is being replaced?

With care. Water use is kept low for a day or two, and the crew will say whether the tank needs pumping to bridge the gap.

Drain Field Repair and Replacement in Ocala, FL