If you searched what a French drain costs and landed on a national pricing page, you probably read a number built around breaking up a basement floor. That number is useless here. Northeast Florida homes are slab-on-grade. There is no basement perimeter to jackhammer, no interior sump pit, no finished lower level to protect.
What we actually get called for is different: a side yard that stays soft for three days after a storm, a back corner that grows moss instead of grass, water sheeting toward the slab off a neighbor’s lot, and sod that keeps dying in the same low spot no matter how many pallets go down.
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This is what that work costs in Duval, St. Johns and Clay counties, priced the way it actually gets built here.
The basement problem. Most top-ranking French drain articles split their pricing into exterior and interior systems, and the interior numbers run roughly $40 to $100 per linear foot because of concrete demolition. If you are reading one of those articles in Jacksonville, about half of it does not apply to your house. Everything below is exterior only.
What drainage work costs in Northeast Florida
These are installed prices, meaning labor, materials, spoil haul-off and basic cleanup. They assume typical residential access and no surprises underground.
| System | Typical installed range | What you are paying for |
|---|---|---|
| French drain, open turf, good access | $25 to $60 per linear foot | Trench, filter fabric, washed stone, perforated pipe, backfill |
| French drain, tight access or under hardscape | $50 to $95 per linear foot | Hand digging, cutting and resetting pavers or concrete, restoration |
| Curtain drain along a property line | $35 to $70 per linear foot | Deeper trench, longer run, usually intercepting flow from off your lot |
| Catch basin, tied into a line | $350 to $900 each | Basin, grate, connection, setting it true to grade |
| Solid discharge pipe | $12 to $25 per linear foot | Non-perforated pipe carrying water to the outlet |
| Pop-up emitter | $150 to $350 each | The daylight outlet at the end of the run |
| Dry well | $1,200 to $3,500 | Buried chamber where there is nowhere to daylight |
| Regrading and swale shaping | $1.50 to $4.50 per square foot | Cut, fill, compaction, shaping positive fall |
| Whole back yard system | $6,000 to $15,000 | Multiple runs, basins, discharge and restoration together |
What a range does not show
Almost every national article prices the trench and stops. A finished job does not stop there, because a French drain that has nowhere to send water is just a buried puddle. The discharge line, the basin, the outlet and the sod restoration are all part of the work, so the all-in cost of a job is meaningfully higher than the trench-only figure suggests. That gap is the most common reason a real quote feels higher than the internet promised.
It is also why we would rather walk the yard than price it over the phone. Depth, access, where the water can actually go and what is already buried out there move the number more than the length of the run does.
Why sandy soil still floods
Homeowners are genuinely surprised by this one. Jacksonville sits on sand, sand drains, so why is the yard holding water?
Three reasons, and usually all three at once.
The water table is close.
Across much of Duval and eastern St. Johns County, the seasonal high water table sits within a couple of feet of the surface during the summer wet season. Sand only drains if there is somewhere below it for the water to go. When the ground is already saturated from below, the surface has nowhere to push water down to.
There is often a hardpan under the sand.
Northeast Florida flatwoods soils frequently carry a dark, cemented layer a foot or two down, where organic material and iron have bonded the sand grains together. Water moves briskly through the loose sand above it and then stops cold. You get a perched layer of water sitting on a hard shelf, which is why a yard can be soupy on top and bone dry three feet down.
The lot was graded for the builder, not for you.
Production grading gets water off the pad and toward the street. It does not account for the pool deck you added, the shed pad, the raised bed along the fence, or the fill the neighbor brought in. Any one of those can dam a flow path that used to work.
This is also why “just add more sod” never fixes it. Sod is not a drainage system, and replacing it in the same low spot every eighteen months costs more over five years than solving the grade once.
What actually drives your quote
- Length of run. The largest single factor, and the one you can estimate yourself by pacing the wet area.
- Depth. Deeper trenches cost more per foot, and depth is dictated by where the water sits and where the outlet is.
- Where the water goes. A yard that falls toward a swale, ditch or retention pond is the affordable version. A flat lot with no outlet needs a dry well or a pump, and the price moves accordingly.
- Access. If a mini excavator can reach the work, you pay for machine hours. If the only way in is a 36 inch gate, you pay for hand digging, and that can double the linear foot cost.
- What is already in the ground. Irrigation lines, invisible fence, low voltage lighting, roots and utilities all slow the dig. Irrigation almost always needs repair afterward, and that is a real line item.
- Restoration. Sod, pavers, mulch and plant replacement are part of the job, not an afterthought. A drain through a finished landscape costs more than the same drain through bare turf.
- HOA and community stormwater rules. Many Jacksonville and St. Johns County communities have rules about where water may be discharged, particularly near retention ponds and common areas. Worth confirming before design, because it can change the outlet and therefore the price.
On discharge. You cannot simply move your water problem onto the lot next door. Practically, that means the outlet has to go somewhere legitimate: the street, a swale, a stormwater structure, or a dry well on your own property. Where a good outlet does not exist, that constraint drives the design more than anything else. We work this out during the site visit, and anything that requires approval is worth confirming with your county or HOA directly.
When a French drain is the wrong answer
We would rather tell you this before you spend money than after.
- The water is only near the house and only after a hard rain. Check gutters and downspouts first. Downspouts dumping at the foundation cause an enormous share of “drainage problems,” and burying downspout lines out to a pop-up is a fraction of the price of a French drain.
- The problem is one shallow low spot. Regrading that area is often cheaper and more durable than piping it.
- Water is pooling on a deck or hard surface, not in the yard. That is a surface pitch and board spacing issue rather than a subsurface one. We covered that separately in why water pools on decks after rain.
- The yard sits in a genuine flood zone. Drainage work manages rainfall on your lot. It does not solve base flood elevation, and anything you build there has its own requirements. See building in a Jacksonville flood zone.
- There is a grade change worth holding. Sometimes the right fix is structural rather than buried. Our post on retaining wall installation in Clay County covers where that makes sense, and we routinely integrate drains, swales and basins into wall projects.
Drainage options compared
| Option | Best for | Weakness |
|---|---|---|
| Regrading and swale | Broad shallow low areas with somewhere to fall | Needs room and a destination |
| French drain | Saturated ground, perched water, long wet strips | Needs an outlet, can silt over time |
| Catch basins and pipe | Defined puddles and hard surface runoff | Only collects where you place them |
| Curtain drain | Water arriving from uphill or off-site | Longer runs, higher total |
| Dry well | Lots with no legal outlet | Limited volume, poor choice in a high water table |
| Downspout burial | Roof water at the foundation | Does nothing for yard-wide saturation |
How long it lasts, and what shortens it
A properly built French drain, meaning washed stone rather than fines, real filter fabric, and consistent fall, should give you 20 to 30 years. The ones that fail early almost always share the same three shortcuts: no fabric or the wrong fabric, dirty stone with sand mixed through it, and a flat run with no slope. Sand is the enemy here. Northeast Florida soil will migrate into a poorly wrapped drain and choke it in a handful of years.
Keeping basins clear of leaves and checking the outlet after storm season covers most of the maintenance.
Frequently asked questions
How much does a 200 foot French drain cost?
Are French drains worth the money?
What are the alternatives to a French drain?
What are the downsides of a French drain?
Where should a French drain not go?
How deep is a French drain usually buried?
My French drain is full of dirt. How do I clear it?
What is the lifespan of a French drain?
Get a real number for your yard
Drainage pricing does not survive being guessed at over the phone. The outlet, the depth, the access and whatever is already buried out there decide the number, and all four need eyes on them.
We will walk the lot after a rain if that helps, tell you honestly whether you need a full system or a downspout fix, and put real figures against it. Drainage work ties into our hardscaping services and our landscaping and yard grading, so if the fix touches a patio, wall or sod, it gets handled as one project rather than three.
Written By:
Coastal Outdoor Construction
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