French Drain Installation Cost in Shreveport, LA

How much does french drain installation cost in Shreveport, LA? Most residential jobs run $25–$60 per linear foot installed, which puts a typical 100-foot run at $2,500–$6,000. A french drain is a gravel-filled trench holding a perforated pipe that collects groundwater and carries it away from your foundation — and in Shreveport’s heavy clay soil, it is one of the most effective defenses against the water problems that crack slabs, flood crawl spaces, and shift piers. This guide covers what french drains cost here, what drives the price up or down, how they compare to other drainage options, and how to keep one working for decades. A french drain protects your foundation by intercepting groundwater before it reaches the soil under your home. In Shreveport, expect $25–$60 per linear foot installed, with most residential jobs totaling $2,500–$8,000 depending on length, depth, and soil conditions.

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What a French Drain Is and How It Works

Despite the name, a french drain has nothing to do with France — it is named after Henry French, a 19th-century farmer who wrote about the technique. The design is simple and has barely changed: a trench dug on a slight downhill slope, lined with filter fabric, filled with gravel, and holding a perforated pipe at the bottom. Groundwater seeps through the gravel, enters the pipe through its holes, and flows downhill to a discharge point away from the house.

The slope is what makes it work. Water does not need much encouragement — a grade of about one percent, roughly an eighth of an inch of drop per foot, keeps it moving toward the outlet. The gravel does two jobs: it creates a fast path for water to reach the pipe, and it keeps soil from clogging the pipe’s holes. The filter fabric wraps the whole assembly like a burrito, letting water in while keeping silt out.

Exterior vs. interior french drains

An exterior french drain runs around the outside of the foundation at footing level, catching water before it reaches the foundation wall. This is the most common type for Shreveport homes and the one this cost guide focuses on. An interior french drain runs under the slab around the inside perimeter, collecting water that has already made it under the house and directing it to a sump pump. Interior systems cost less to install (no exterior excavation) but they manage water rather than preventing it from reaching the foundation.

Why Shreveport Foundations Need French Drains

Shreveport gets around 50 inches of rain in a typical year, and it tends to arrive in heavy bursts — spring thunderstorms and tropical systems that dump inches in hours. Our soil is heavy clay that absorbs water slowly and swells when wet, pressing against foundation walls and seeping into crawl spaces. When the clay dries in summer, it shrinks and pulls away, leaving gaps. This constant swelling and shrinking is what cracks slabs, shifts piers, and opens the gaps where water enters.

A french drain breaks this cycle by giving groundwater a faster path away from the house than through the clay against your foundation. It does not change the soil, but it keeps the soil around your foundation from staying saturated. For homes with a history of standing water, soggy soil days after rain, or water in the crawl space, a french drain is often the single most effective fix. Our guide to foundation drainage systems walks through the full set of options, and the USGS water resources pages at usgs.gov have useful background on how groundwater moves through soils like ours.

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French Drain Installation Cost in Shreveport, LA

Here are the numbers, with the caveats up front: every yard is different, and the only real price is the one on a written quote for your specific property. But these ranges reflect what Shreveport homeowners typically see for professional installation.

Two things that commonly surprise homeowners: cutting and replacing concrete — a driveway or patio in the drain’s path can add $500–$2,000 — and the discharge solution. If your lot is flat with nowhere for water to drain by gravity, you will need a sump pump and possibly a dry well, which adds $800–$2,500 to the project.

What Drives the Price Up or Down

Two neighbors can get quotes thousands apart for what sounds like the same drain. Here is what actually moves the number.

• Length of the run. This is the base of the whole estimate. More feet of trench means more digging, more gravel, more pipe, and more labor. A 60-foot run on one side of the house costs roughly half what a 120-foot run costs.
• Depth of the trench. An exterior drain at footing level — typically two to three feet deep — costs more than a shallow yard drain. Deeper means more excavation, more gravel, and more soil to haul away.
• Soil conditions. Digging in dry summer clay is like cutting concrete; digging after a wet spring means fighting heavy, sticky soil. Rocky soil or high water tables slow the work and raise the price.
• Access. A wide-open side yard is fast. A narrow passage between houses, a fence that cannot come down, mature landscaping, or a steep slope all slow the crew and add labor hours.
• Obstacles in the path. Concrete driveways, patios, sidewalks, and buried utilities that must be worked around add cutting, removal, and replacement costs. Each obstacle is a line item.
• Where the water goes. Draining to daylight — a downhill outlet at the curb or a ditch — is cheapest. Flat lots with nowhere to drain need a sump pump ($800–$1,500) and possibly a dry well or storm tie-in.
• What gets restored afterward. Sod replacement, regrading, and hauling excess soil cost money. Ask whether restoration is included or if you will be left with a trench line to fix yourself.

A legitimate quote lists the linear footage, depth, pipe and gravel specifications, the discharge plan, and what restoration is included. If a quote is just a single number with no breakdown, ask for the details — or get another quote. The cheapest bid is not always the best; the most detailed bid usually is.

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French Drain vs. Other Drainage Options

A french drain is the right answer for subsurface water — water moving through the soil toward your foundation. But not every water problem is subsurface. Here is how it compares:

In practice, these fixes stack. Regrading plus downspout extensions solves a surprising number of Shreveport water problems for under $1,500. When that is not enough — when water is coming through the soil, not over it — a french drain is the next step. Our drainage correction and water management services cover the full range, from grading to full perimeter systems. And if you are seeing the structural symptoms — cracks, sticking doors, uneven floors — read our signs of foundation settling guide so you know what the water may already have done.

Maintenance: Keeping Your French Drain Working for Decades

A properly built french drain is low-maintenance, not no-maintenance. A little attention each year keeps it flowing for 30–50 years.

• Keep the discharge point clear. Walk the outlet after heavy storms. Leaves, mulch, and sediment collect at daylight outlets and can block the flow. A blocked outlet backs water up into the entire system.
• Watch what goes into the trench line. Do not pile soil, mulch, or debris over the drain path, and do not drive vehicles across a shallow yard drain. Compaction crushes the gravel voids that make the drain work.
• Use cleanouts if you have them. Many systems include vertical cleanout pipes at corners or intervals. Running a garden hose through the cleanout once a year flushes silt before it builds up.
• Keep deep roots away. Do not plant trees or large shrubs within about ten feet of the drain line. Roots seek water, they will find the pipe, and they will clog it. This is the most common cause of premature drain failure.
• Check the sump pump twice a year. If your system discharges through a pump, pour a bucket of water in the basin each spring and fall to make sure the pump activates and the discharge is clear.
• Notice changes in performance. If an area that used to drain well starts holding water, something changed — sediment buildup, a crushed section, or a blocked outlet. Catch it early and the fix is small.

The EPA’s stormwater guidance at epa.gov is a solid reference for how residential drainage fits into the bigger picture of managing runoff on your property. For the foundation side of the equation, our foundation repair services address what happens when water has already done its damage.

Frequently Asked Questions

How much does a french drain cost per foot in Shreveport?

Most residential exterior french drains in the Shreveport area run $25–$60 per linear foot installed. The low end covers straightforward runs with easy access and gravity discharge; the high end covers deep footings, difficult access, concrete cutting, or sump pump discharge. A 100-foot run typically totals $2,500–$6,000.

How long does french drain installation take?

A single-side residential drain typically takes one to two days. A full perimeter system with a sump pump takes two to four days. Weather matters — a crew can trench faster in dry conditions than in mud. Restoration (sod, grading) may add a day.

Do I need a french drain, or will better grading fix my problem?

It depends on where your water is. If rain runs across the yard surface and pools against the house, regrading and downspout extensions (often under $1,500) may solve it. If the soil stays soggy days after rain, water seeps through foundation walls, or the crawl space is damp, the water is subsurface and a french drain is the right fix. A free inspection can tell you which you have.

Where does the water go after it enters the french drain?

To a discharge point downhill from the house — ideally daylight, meaning the pipe simply exits at the surface at a curb, ditch, or low point of the yard. If the lot is flat, a sump pump lifts the water to a discharge point. The discharge plan is part of every legitimate quote; make sure yours specifies it.

Can a french drain be installed any time of year?

Yes, with one caveat. Drier months make trenching faster and cleaner — dry clay cuts like brick, but wet clay is heavy and messy. That said, drains are installed year-round in Shreveport. If your problem is urgent (water in the house), do not wait for ideal weather.

How long do french drains last?

A properly built french drain — correct slope, washed gravel, filter fabric, solid discharge — routinely lasts 30–50 years. The most common premature failures are root intrusion (planted too close), a blocked outlet (never checked), or silt clogging from omitting the filter fabric. All are preventable.

Will a french drain fix my wet crawl space?

It fixes the water source, which is usually the main battle. An exterior french drain intercepts groundwater before it reaches the foundation, which dries out the crawl space in most cases. If the crawl space has standing water or the soil is saturated, pairing the drain with a vapor barrier and proper ventilation (or encapsulation) gives the best result.

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Get a Free Drainage Inspection in Shreveport

Water problems do not fix themselves, and they rarely stay the same size — they grow. A free inspection from Pelican Foundation Repair tells you where your water is coming from, whether a french drain is the right fix, and what it will cost for your specific yard. We serve Shreveport and surrounding communities — see our full service areas across Caddo and Bossier parishes.

Pelican Foundation Repair
6118 Fairfield Ave, Shreveport, LA 71106, USA
(318) 585-2003