How Much Does Drain Field Repair Cost in Florida?
National cost guides put most drain field repairs at about $1,000 to $15,000. The same guides put a full drain field replacement at about $2,000 to $20,000. A 2026 Florida cost guide prices South Florida repairs at $3,000 to $5,500. It puts full replacements there at $12,000 to $25,000.
These are market numbers, not our price list. The range is wide because a repair can mean one broken line or a whole new field. If you are weighing drain field repair, the price turns on what failed and what the soil allows.
What does each kind of drain field job cost?
| Job or fee | Published range | Source |
|---|---|---|
| Distribution box repair or replacement | $500 to $1,500 | A 2026 Florida cost guide |
| Single line repair | $1,500 to $3,500 | A 2026 Florida cost guide |
| Drain field jetting or rejuvenation | $1,000 to $3,000 | A 2026 Florida cost guide |
| Replacing leach lines | $20 to $45 per linear foot | National cost guides |
| Partial drain field replacement | $3,500 to $8,000 | A 2026 Florida cost guide |
| Full drain field replacement | $3,000 to $15,000 | A national cost guide |
| Full drain field replacement | $5,000 to $22,000 | A Florida septic cost page |
| Mound or low-pressure dosed replacement | $15,000 to $25,000 | A 2026 Florida cost guide |
| Repair application and evaluation | $50 | The state’s fee rule |
| Repair permit, standard system | $210 | Broward County health department |
| Repair permit, filled or mound system | $260 | Broward County health department |
The rows overlap, so do not add them up. A full replacement price already covers the new lines. A 2019 University of Florida extension fact sheet put repairs or a new tank at $3,000 to $10,000.
Why does a repair cost so much less than a replacement?
The top rows in the table are repairs that keep the existing field. A crushed line or roots in the distribution box can stop a field that is otherwise sound. Florida’s repair rule covers root problems by name. If clearing the roots and replacing damaged parts restores the field, an inspection can close out the permit.
The rule also allows repairs that add no new field, such as high-pressure jetting of the drain lines. These need extra detail on the permit application. The rule bars them when the field’s bottom sits within 6 inches of the wet-season water table. Then the old field comes out, and a new one goes in.
If the trouble starts in the tank, the fix is septic tank repair instead. Our guide to the signs a septic system needs repair covers what to watch for.
How does the size of the field change the price?
A bigger field means more trench to dig and more material to fill it. National guides put labor at about 60 percent of a new drain field’s cost.
Florida’s rule says a repaired field generally may not be smaller than the old one. Systems installed before 1983 get a sizing table based on bedrooms and soil. A replacement field for a three-bedroom home on sandy soil needs at least 225 square feet of trench.
A system permitted in 1983 or later can grow more. If it failed from too much water, new field is added to the old one. The total must be 50 percent larger than the original, or meet current sizing if that is larger.
Size can also add a pump. A repaired field over 1,000 square feet must be dosed, and so must one the tank cannot feed by gravity. One national guide says pressure-dosed systems cost more because of the pump and its electrical work.
Why do the soil and the water table matter so much here?
Florida measures each drain field against the water table in the wettest season. A new system needs at least 24 inches between that water table and the field’s bottom. Repairs that cannot meet 24 inches get a set minimum. For a system permitted in 1983 or later, the floor is 12 inches. Older systems can go to 6 inches.
The National Weather Service dates South Florida’s wet season from May 15 to October 15. Those months bring 60 to 70 percent of the year’s rain and largely set the year’s groundwater.
Federal soil surveys show much of Lake Worth Beach on deep, fast-draining sand. In low flatwoods sands, the water table can sit within 18 inches of the surface for 1 to 4 months.
Where the water sits high, a new field may need to be built up on fill. National guides price mound fields at about $10,000 to $20,000. A 2026 Florida cost guide says most South Florida replacements use mound or low-pressure designs. It puts those at 50 to 100 percent more than conventional fields.
Do chamber drain fields cost more than gravel ones?
Two national guides price new chamber septic systems at $4,000 to $12,000. The same guides put conventional gravel systems at $3,000 to $8,500. Those are prices for whole new systems, so the gap is rough.
The state lists approved chamber products and credits each model with a set number of square feet. Its rule bars approving any alternative material that would make a field smaller than a gravel one. So a chamber field in Florida is no smaller than a gravel design for the same home.
Gravel must meet the state transportation department’s aggregate spec, at least 12 inches deep. In a repair, gravel and soil dug out of the old field may not be reused. So a gravel repair needs new rock. Undamaged drain field units and pipes may go back in on the same site.
How much do permits add to the cost?
Florida law requires a permit before a septic system is repaired. In Palm Beach, Broward, Martin and St. Lucie Counties, the county health department office issues it. It applies the state’s septic rules, Chapter 62-6 of the Florida Administrative Code.
The state’s fee rule, updated in June 2026, sets $50 for the repair application and evaluation. The first inspection costs $75, plus a $5 surcharge on repair permits. The Florida Department of Environmental Protection says the county health department sets the total fee, county fees included.
Broward County charges $210 for a standard repair permit and $260 for a filled or mound one. Its health department staff charge $140 for the site evaluation, or an approved evaluator can do it. The permit stays valid for 90 days, and the rule allows one 90-day extension.
Will the septic tank need replacing too?
Not always. Florida’s repair rule lets the old tank stay if the health department finds it sound and built of approved materials. It also has to be within two tank sizes of today’s minimum.
A kept tank still gets pumped, and it needs a solids deflection device on the outlet if it lacks one. A national guide prices pumping at $300 to $700 and says a new drain field job requires it.
National guides price a tank and drain field together at about $4,500 to $20,000. A Florida septic cost page puts a tank replacement alone at $3,500 to $13,000. When both parts fail, the job looks more like septic system installation.
How do you get a real number for your drain field?
Every figure above comes from published cost guides or public fee sheets. Your number depends on what failed and on the water table under your field. Jojo Septic handles drain field repair across Palm Beach, Broward, Martin and St. Lucie Counties.
See our drain field repair page for what the job covers. We look at the job and put the quote in writing. Call or text (561) 239-5838.