Land Grading & Yard Drainage in Kentucky: Costs, Methods, When to Call a Pro
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.
Topics
- grading
- drainage
- kentucky
- french-drain
Frequently Asked Questions
How much does land grading cost in Kentucky?
Most residential regrading jobs in Kentucky run $1,800–$6,500 depending on yard size, cut/fill volume, and whether new soil or sod is included. Corrective grading around a wet foundation typically lands $2,500–$5,000. Acreage rough grading prices per hour of machine time, usually $185–$285/hr.
What's the code for grade slope away from a foundation?
Kentucky and Louisville Metro code calls for at least 6 inches of fall in the first 10 feet from the foundation — about a 5% slope. Most wet-basement calls we get trace back to a yard pitched the wrong way or a flat zone within 10 feet of the house.
French drain vs. swale — which do I need?
Swales handle surface water (sheet flow across a yard) and are cheaper at $8–$18 per linear foot. French drains handle subsurface water (saturated soil, seeping foundations) and run $25–$45 per linear foot installed. Many Jefferson County clay yards need both.
Can I regrade my own yard or do I need a contractor?
Small touch-up grading near a downspout is fine for a homeowner with a wheelbarrow and a level. Anything that changes how water leaves your lot, crosses a property line, or sits within 10 feet of the foundation should be done by a licensed grader — both for code compliance and to avoid creating a drainage problem for your neighbor.
How long does a yard drainage fix take?
Most residential drainage corrections — regrade, swale, or French drain on a single side of the house — are done in 1–3 working days. Whole-lot regrading with new sod runs 4–7 days. We try to schedule drainage work during dry windows so the new grade has time to set before the next storm.