Henry County, GA • Pricing Guide
How Much Does French Drain Installation Cost in McDonough GA?
Real Henry County pricing for french drain installation. Exterior runs $25 to $40 per linear foot; interior basement systems run $40 to $55 per linear foot. Every cost factor that affects your specific project, explained.
| Installation Type | Cost Per Linear Foot | Typical Project Total |
|---|---|---|
| Exterior French Drain | $25 to $40 per linear foot | $2,500 to $9,000 |
| Interior Basement Drain | $40 to $55 per linear foot | $4,000 to $11,000 |
| DIY Materials Only | $15 to $25 per linear foot | $1,500 to $5,000 |
Why Georgia Red Clay Affects Cost
French drain installation in Henry County costs more than in sandy-soil regions for two reasons. First, trenching through Cecil red clay requires more labor and equipment time than trenching through sandy or loamy soils. The dense clay resists digging and wears trenching equipment faster. Second, installations in Georgia clay require heavier-duty geotextile filter fabric to prevent clay fines from migrating into the drain stone and clogging the system over time. That fabric is a non-negotiable component that adds material cost.
Installations that skip proper fabric or use cheap non-woven fabric rated for sandy soils fail in Henry County conditions. The fabric failure means the drain stone fills with fine clay particles within one to two seasons, and the system stops working. Doing it correctly the first time costs more upfront but avoids a complete reinstall in year two or three.
Cost Factors for Your Specific Project
The most direct cost driver. A 100-foot drain at $30/ft = $3,000. A 200-foot drain = $6,000. Estimating trench length requires walking the property to trace where water enters and where it can safely exit.
Standard residential installation is 18 to 24 inches deep. In Henry County soils, reaching below the clay horizon sometimes requires 30 to 36 inches, which adds excavation time and labor cost. Depth is determined by where the outlet point is and how far below grade the clay horizon sits.
Tight residential lots in McDonough subdivisions where a mini excavator can't reach require hand-digging sections, which adds significant labor cost. Properties with clear machine access cost less to trench.
A simple daylight outlet on a slope is the least expensive. A catch basin tied to storm drainage costs more. A dry well requires excavation of an additional pit and clean stone backfill. Outlet choice is driven by what your property's topography makes possible.
Tree roots, hardscape, existing irrigation lines, and utility crossings all add cost. We locate utilities before digging, but working around existing landscape features in established McDonough neighborhoods takes more time than open-lot work.
A land disturbance permit (LDP) is required for grading over 120 sq ft. Permit fees through the SagesGov portal vary by project scope. Permit cost is separate from installation cost and is the homeowner's responsibility or can be handled by the contractor.
DIY vs. Professional Installation in Henry County
DIY french drain materials in Henry County run $15 to $25 per linear foot for pipe, stone, and fabric. The labor saving looks attractive. However, DIY installations in Georgia red clay have a much higher failure rate than professionally installed systems for two reasons.
First, most homeowners underestimate the required trench depth. Surface-level installations in Cecil clay fail because the pipe sits in saturated clay with nowhere for water to go. Second, most homeowners use inadequate filter fabric. The non-woven fabric specified for Georgia clay conditions is specific and more expensive than what most hardware stores sell. Using the wrong fabric leads to clay migration and drain failure within one to two seasons.
For most Henry County homeowners, the cost difference between DIY and professional installation is $10 to $20 per foot. On a 100-foot drain, that's $1,000 to $2,000. The risk of an incorrectly installed system failing and requiring full reinstall makes professional installation the better investment in Georgia clay conditions.
The best way to know what your specific project costs is a free on-site estimate. We walk the property, assess the drainage problem, measure the required trench length, and give you a straight quote with no pressure.