Land Grading & Yard Drainage in Kentucky: Costs, Methods, When to Call a Pro
Standing water, eroding slopes, wet basements — fix it with proper grading. Real Kentucky pricing for lot grading, swales, French drains, and regrade work in 2026.
If water is sitting in your yard, running toward your foundation, or showing up in your basement, the answer almost always starts with grading — not a sump pump, not gutter extensions, not a French drain alone. Get the grade right first, then the rest of the drainage details actually work.
What "proper grade" means
- Around the house: the ground should drop 6 inches in the first 10 feet away from the foundation in every direction. That's code in Louisville Metro and most of Kentucky.
- Across the yard: a minimum 2% slope away from structures and toward a daylighted outlet, swale, or storm tie-in.
- No back-pitching of driveways, patios, or walkways toward the house. Ever.
If your lot doesn't do those things, water is going to find your basement no matter how many gutters you add.
Common Kentucky drainage problems we fix
- Wet basement walls in Louisville's Highlands, St. Matthews, and older Crescent Hill homes — usually negative grade against the foundation from 50 years of mulch piling up.
- Standing water in the back yard in Bullitt and Nelson County subdivisions — flat clay pads with no positive outlet.
- Eroding slopes on hillside lots in Prospect and Anchorage — water sheeting down a 3:1 slope without check dams or a swale.
- Driveway-foundation interface flooding — the apron poured back-pitched toward the garage.
What it costs to fix in Kentucky (2026)
- Regrade around foundation, 4 sides of a typical home: $2,500–$6,500
- Swale, 80–120 ft long: $1,500–$3,500
- French drain, 60 ft, daylighted: $2,000–$4,500
- French drain tied to sump or pop-up emitter: $2,500–$5,500
- Full lot regrade (1/3 acre): $6,000–$15,000
- Slope stabilization with riprap or terracing: $3,000–$12,000+
When DIY works and when it doesn't
A few yards of topsoil to regrade a flowerbed away from the foundation? Fine, do it. A 200-ft yard with three different slopes meeting at the patio? That needs a transit, an excavator, and someone who's done it 100 times. The mistake we see most often is homeowners spending $1,500 on bagged topsoil that gets washed away in the first storm because the underlying subgrade was never reshaped.
How we quote drainage work
Every drainage quote includes a site walk after a hard rain when possible, contour shots with a laser level, a sketch of the proposed grade and outlets, and a written scope with materials, depths, and warranty terms. Get a drainage estimate — we'll tell you honestly whether grading alone will fix it or whether you need grading plus drains.