French Drain Installation in Greenwood, LA: Cost & Process

French Drain Installation in Greenwood, LA: Cost & Process

French drain installation in Greenwood, LA typically costs $1,500 to $6,000 depending on length, depth, and soil conditions. Greenwood’s larger lots and heavy Caddo Parish clay make French drains one of the most effective fixes for soggy yards and water pooling against foundations.

How much does French drain installation cost in Greenwood? Most residential French drains in the Greenwood area run $25 to $50 per linear foot installed, so a typical 60- to 100-foot drain along a foundation or across a low yard lands between $1,500 and $6,000. The installation takes one to three days: trench, gravel bed, perforated pipe, filter fabric, backfill, and a discharge point that actually moves water away from the house.

Greenwood homeowners know the pattern well: a Gulf-fed storm rolls through, the yard turns into a shallow lake, and the water sits there for days because the clay underneath will not let it drain. That standing water is not just a lawn problem — it saturates the soil against your foundation, feeds the shrink-swell cycle that cracks slabs, and keeps crawl spaces damp for weeks. This guide walks through what French drains cost in Greenwood, how the installation process works step by step, how to size and design one for a larger lot, and how to keep it flowing for years.

Why Greenwood Yards Need French Drains

Greenwood sits just west of Shreveport along the I-20 corridor on the same expansive clay that underlies most of Caddo Parish. You can confirm the mapped soil under your property with the USDA Web Soil Survey, but the practical reality is simple: clay absorbs water slowly and releases it even more slowly. After a heavy spring storm, water that would drain through sandy soil in hours sits on Greenwood clay for days.

Greenwood lots make this worse in a specific way. Lots here run larger than in-town Shreveport — often a half acre or more — which means more roof area, more driveway, and more yard all shedding water toward the same low spots. Newer subdivisions built on previously undeveloped clay ground add another wrinkle: the grading that looked fine on move-in day settles over the first few years, and low spots develop right where the builder promised positive drainage. Out toward the Texas line and around the older parts of town near Greenwood High School, mature trees complicate things further — their roots drink unevenly, drying the soil on one side of a house while the other side stays soggy.

The result is the classic Greenwood drainage complaint: a yard that holds water for days after every storm, mulch beds that wash out, and — the expensive part — saturated soil pressing against the foundation. That constant moisture feeds the clay’s shrink-swell cycle, and the shrink-swell cycle is what cracks slabs and shifts piers. A French drain does not fix a cracked foundation, but it removes the water that caused the crack, which is why drainage work shows up in so many lasting foundation repairs.

What French Drain Installation Costs in Greenwood, LA

French drain pricing in Greenwood runs $25 to $50 per linear foot installed for a standard residential drain, which puts most projects in this range:

• Short foundation drain (40–60 feet): $1,500 to $3,000 — a run along one problem side of the house, intercepting roof and surface runoff.
• Typical full-side or L-shaped drain (60–100 feet): $2,500 to $5,000 — the most common Greenwood residential job.
• Long yard drain or multi-run system (100–200+ feet): $4,000 to $8,000 — for larger lots with multiple low spots or water crossing the whole yard.
• Deep drain (3+ feet) or drain through difficult access: adds 20 to 40 percent — hand-digging near utilities, mature trees, or tight side yards costs more.

Several factors push a quote up or down within those ranges. Depth matters: a shallow 18-inch curtain drain is far cheaper than a 4-foot foundation drain. Access matters: a trencher can cross an open back yard in an afternoon, but hand-digging between a house and a fence line is slow work. Discharge matters too — if the lot has no natural downhill outlet, the system may need a sump basin with a pump, which adds $800 to $1,500. And soil matters: Greenwood clay is brutal to dig by hand, which is one more reason quotes here run higher than the national averages you see online.

Anyone quoting a firm price without walking your lot is guessing. The slope of the yard, the location of utilities, and where the water can legally and practically discharge all change the design — and the design changes the price. A free on-site inspection with a real drainage plan beats a phone estimate every time.

The Installation Process, Step by Step

A properly installed French drain is a simple system built carefully. Here is what the process looks like on a typical Greenwood residential job:

• Step 1 — Plan the route and the outlet: the crew maps where water collects and where it can go. Every drain needs a discharge point lower than its start — a ditch, a swale, a dry well, or a sump basin. No outlet, no drain. This step decides whether the system works.
• Step 2 — Call 811 and mark utilities: before any digging, underground utilities get located and marked. In Greenwood’s newer subdivisions the utility corridors are usually well mapped; on older or rural lots this step matters even more.
• Step 3 — Dig the trench: typically 12 to 18 inches wide and 18 to 36 inches deep for a yard drain, deeper for a foundation drain. The trench bottom is graded to a steady slope — about a 1 percent fall, or an inch of drop every 8 feet — so water flows instead of sitting.
• Step 4 — Line with filter fabric: a permeable landscape fabric lines the trench. This is the step cheap installations skip, and it is the reason cheap drains clog within a few years — without fabric, clay silt migrates into the gravel and chokes the system.
• Step 5 — Gravel bed and perforated pipe: washed gravel goes in first, then rigid perforated PVC pipe (holes facing down, so water rises into the pipe from below), then more gravel over the top. Corrugated flexible pipe is cheaper but crushes and clogs more easily in clay — rigid pipe is worth the upgrade.
• Step 6 — Wrap and backfill: the fabric wraps over the gravel like a burrito, then soil goes back on top, graded to keep surface water flowing toward the drain rather than past it.
• Step 7 — Build the discharge: the pipe daylights at the outlet — ideally onto a splash pad or into a swale well away from the house and the neighbor’s lot — or into a sump basin with a pump where gravity will not cooperate.

Most residential jobs finish in one to three days. The yard looks rough for a week or two while the trench settles, then sod or seed goes down and it disappears. Ask your contractor what pipe and fabric they use — the materials are where good drains and bad drains diverge.

Sizing and Design: Getting a Greenwood Drain Right

Two drains of the same length can perform completely differently depending on design. A few principles matter most on Greenwood lots:

• Intercept water before it reaches the house. A drain 10 to 15 feet uphill of the foundation catches sheet flow from the yard before it saturates the soil against the slab. A drain tight against the footing handles water already at the house. Many Greenwood jobs need the first kind more than the second.
• Mind the roof. A 2,000-square-foot roof sheds over 1,200 gallons in a single inch of rain. If your downspouts dump at the foundation, tying them into solid pipe that runs to the discharge point — or into the French drain system — removes the single biggest water source most homes have.
• Respect the clay. In sandy soil, water moves sideways into a drain quickly. In Greenwood clay it moves slowly, so drains here work best placed where water already collects, with enough gravel to give it somewhere to go. Deeper is not automatically better — a drain below the water table just becomes a well.
• Plan the outlet first. Walk the lowest edge of your lot during a hard rain and watch where water wants to go. That is your discharge point. If there is no downhill path off the lot, plan for a sump basin and pump from the start rather than discovering the problem mid-trench.
• Do not drain onto the neighbor. Caddo Parish takes a dim view of redirecting your water problem onto someone else’s lot, and it is a fast way to start a dispute. Keep discharge on your own property or in an approved drainage easement.

For a deeper look at the full range of water problems around a foundation — grading, gutters, sump systems, and when each one is the right fix — see our guide to how to fix poor drainage around your foundation.

Keeping Your French Drain Flowing: Maintenance That Matters

A well-built French drain is low maintenance, not no maintenance. In clay country, silt is the enemy — fine particles work their way in over the years, and a drain that flowed freely in year one can slow to a trickle by year eight if it was built without filter fabric or never gets checked.

The maintenance list is short but worth doing:

• Walk the discharge point twice a year. After spring storms and again in fall, check that the outlet flows freely and is not buried under mulch, silt, or a well-meaning landscaping project.
• Keep surface grading intact. The soil over the trench settles in the first year; top it up so water still flows toward the drain instead of ponding over it.
• Clean gutters and downspout tie-ins. If your downspouts feed the system, a clogged gutter starves the drain of its design flow and dumps water at the foundation instead.
• Watch for new wet spots. A soggy patch appearing uphill of a previously dry drain can mean silt buildup — a professional flush with a pressure jetter usually restores flow.
• Service the sump pump yearly if your system has one: test the float switch, clear the basin, and confirm the discharge line is open before spring storm season.

With filter fabric, rigid pipe, and basic attention, a French drain in Greenwood clay should serve 20 to 30 years. Without fabric — the shortcut that defines most failed drains — expect half that. When you are comparing quotes, the fabric and pipe spec is the line item that tells you which contractor is building for decades and which is building for the invoice.

French Drain Installation for Greenwood Homes

Drainage is the unglamorous half of foundation work, and in Greenwood it is often the more important half. A pier system installed without addressing the water that moved the soil is a repair waiting to be redone — which is why drainage correction shows up alongside structural work in so many lasting repairs.

Pelican Foundation Repair serves Greenwood and the surrounding Caddo Parish communities with drainage correction services — French drains, grading, downspout systems, and sump installations designed for this clay. If you want the cost picture for the metro generally, our French drain installation cost guide for Shreveport covers the same pricing logic lot by lot. Inspections are free, Monday through Saturday, 8:00 AM to 6:00 PM, and qualifying structural work carries our 20-year warranty. Start at Pelican Foundation Repair and get a drainage plan drawn for your actual lot, not a phone guess.

Frequently Asked Questions

How much does French drain installation cost in Greenwood, LA?

Most residential French drains in Greenwood cost $25 to $50 per linear foot installed, putting typical 60- to 100-foot projects between $1,500 and $6,000. Depth, access, soil conditions, and whether a sump pump is needed all move the final price.

How long does it take to install a French drain?

Most residential installations take one to three days. A short straightforward run can finish in a day; longer multi-run systems or hand-dug trenches in tight access take closer to three.

Will a French drain fix my soggy yard in Greenwood clay?

Usually yes, if the drain is placed where water collects and has a working discharge point. Clay drains slowly, so the system needs proper gravel volume and filter fabric to keep silt out — design matters more here than in sandy soil.

Do I need a permit for a French drain in Greenwood?

Simple yard drains typically do not need permits, but rules vary between Greenwood, Caddo Parish, and HOA covenants in newer subdivisions. Check with the parish permit office and your HOA before digging, and always call 811 for utility locates.

Can I install a French drain myself?

A handy homeowner can dig a short shallow drain, but Greenwood clay is brutal to dig by hand, proper slope and filter fabric are easy to get wrong, and a drain with no real outlet just moves the puddle. Professional installation usually pays for itself in a system that actually works.

How long does a French drain last?

A properly built drain with filter fabric and rigid perforated pipe should last 20 to 30 years in clay soil. Drains built without fabric often clog with silt in under a decade.

Where should the French drain discharge?

To the lowest practical point on your own lot — a ditch, swale, or dry well — well away from the house and never onto a neighbor’s property. Where gravity will not cooperate, a sump basin with a pump lifts the water to the discharge point.

Will a French drain help my foundation problems?

It removes the water driving them. Saturated clay is what moves foundations in Greenwood, so drainage correction is frequently part of a lasting foundation repair — but existing structural damage still needs its own repair on top of the drain.

Pelican Foundation Repair
6118 Fairfield Ave, Shreveport, LA 71106, USA
318-585-2003
https://foundationrepairshreveport.com/