How Much Does a French Drain Cost in Middle Tennessee?

French drains are the most common drainage solution in Lebanon, Mt. Juliet, and the surrounding Wilson County area — and for good reason. Wilson County's clay soil doesn't drain well, the terrain has real grade changes, and most subdivision lots weren't designed with individual yard drainage in mind. A properly installed French drain solves those problems by intercepting water before it pools and directing it to a proper outlet.

Here's a realistic breakdown of what French drain installation costs in Middle Tennessee, what's included, and what factors drive the price up or down.

What Is a French Drain?

A French drain is a gravel-filled trench containing a perforated pipe. The gravel allows water to enter the trench from the surrounding soil and surface. The perforated pipe collects that water and carries it to a discharge point — typically a daylight outlet at a low point on the property, a storm drain, or a drainage easement. When properly designed and installed, a French drain intercepts water before it reaches problem areas: foundations, patios, low points in the yard, or basement walls.

French Drain Cost in Middle Tennessee: What to Expect

French drain installation in Lebanon, Mt. Juliet, and Wilson County typically runs:

• Basic residential French drain (50–75 linear feet, daylight outlet): $1,500–$2,500. This covers a straightforward trench along a fence line or yard perimeter with a pop-up emitter outlet. Common fix for a single wet area or one side of a house.

• Mid-complexity system (75–150 linear feet, with catch basin or downspout tie-ins): $2,500–$4,000. Longer runs, multiple inlet points, or a catch basin addition drive this range. Typical for a yard with multiple problem areas or where downspouts need to be tied into the drain line.

• Complex or full-perimeter system (150+ linear feet, multiple inlets, buried outlet to street or drainage easement): $4,000–$6,500+. Full-perimeter foundation drainage, multiple catch basins, or a long pipe run to reach a proper outlet. Common for properties with significant saturation problems or where the only outlet is distant.

What Drives French Drain Cost in Wilson County

*Trench length.* The per-linear-foot cost for a French drain (excavation, gravel, pipe, backfill) typically runs $20–$35/linear foot in Middle Tennessee. A 50-foot drain costs less than a 150-foot drain — straightforward.

*Depth required.* Most surface French drains are 12–18 inches deep. Drains that need to intercept deeper groundwater — near a foundation, for example — may go 24–36 inches, which increases excavation time and cost.

*Outlet conditions.* The discharge point is often the most variable cost. If there's a natural daylight point nearby (a low slope, a drainage swale, or a street gutter within 30 feet), outlet cost is minimal. If the nearest outlet is 100+ feet away or requires boring under a driveway, cost increases significantly.

*Catch basins.* Adding a surface catch basin (a grated inlet that captures runoff at a specific low point) adds $400–$800 per basin depending on size and connection. Often the most effective addition for a property with a specific ponding spot.

*Downspout tie-ins.* Connecting existing downspouts to the French drain line so roof runoff is captured and directed away adds $150–$400 per downspout depending on access.

*Site access.* Properties where the drain needs to go through a tight side yard, under landscaping, or in an area a trenching machine can't reach cost more due to hand-digging labor.

French Drain vs. Regrading: Which Do You Need?

This is the most common question we hear, and the answer depends on the root cause of the drainage problem.

*Regrading* addresses surface water flow — it reshapes the ground so water moves away from problem areas naturally. It's the right fix when the issue is that the ground slopes toward the house or toward a low point where water collects. Regrading doesn't help when the soil is simply saturated and water has nowhere to go.

*French drains* address both surface water and groundwater by capturing and redirecting it to an outlet. They're the right fix when water is pooling in areas that slope correctly but still saturate, or when the soil permeability (Wilson County clay) is the limiting factor.

Many properties in Lebanon and Mt. Juliet need both: regrading to correct the surface flow pattern, and a French drain to handle what the regrading can't redirect. We assess each site and recommend the most cost-effective combination for the specific conditions.

Does Wilson County Clay Soil Change the Cost?

Yes, slightly. Clay soil is denser and harder to trench than sandy soil, which adds some equipment time. More importantly, Wilson County clay requires that French drain trench walls be properly lined with filter fabric to prevent clay from migrating into the gravel and clogging the system over time. A French drain installed without filter fabric in clay soil will lose effectiveness within 5–10 years as clay infiltrates the gravel. Lebanon Scapes includes filter fabric on every French drain we install in Wilson County.

Getting a French Drain Quote in Lebanon or Mt. Juliet

Lebanon Scapes & Construction offers free on-site drainage assessments and quotes in Lebanon, Mt. Juliet, and across Wilson County. We walk the property, identify the cause of the problem, and give you a specific written quote. We don't give phone estimates for drainage — the site conditions matter too much.

Call or text 615-487-2965 or fill out our contact form at [LebanonScapes.com/contact](/contact). We respond same-day and can typically schedule within the week.