To grade a yard for drainage, shape the ground so it falls away from the house on every side and then gives the water a clear path off the property. The work is cut and fill: take dirt from the high spots, pack it into the low ones, and finish with topsoil so the new slope holds.
Before you grade a yard for drainage, watch the water
Before moving any dirt, find out where the water actually goes. Walk the yard during a steady rain or right after one. Note where it pools, where it runs, and where it sits for days. Check where each downspout empties.
Most yard drainage problems show up in a few places: against the foundation, in a low patch in the middle of the lawn, along a fence line where the neighbour's yard is higher, or at the bottom of a driveway. Each one has a cause in the shape of the ground. A sketch of the yard with arrows for the water is the most useful plan you can make, and it is the first thing a grading contractor will want to see.
Slope the ground away from the house
The ground right next to the foundation should fall away from it, so rain off the roof and walls runs out into the yard instead of down along the basement or crawlspace wall. Over time, backfill around a house settles and the slope can reverse without anyone noticing.
Building codes set a minimum fall away from foundations, and the figure can vary by town. Your local building department can tell you what applies to your house. Build the slope with packed dirt, not loose mulch or topsoil alone, because loose material settles and the problem comes back. Downspouts should empty well past the regraded area.
Give the water somewhere to go
Sloping water away from the house is only half the job. It then needs a route off the property, to a street, a ditch or a natural low point. On most yards that route is a swale: a wide, shallow channel shaped into the lawn that carries water without looking like a ditch.
Where the yard is too flat for a swale to work, or the water has to pass under a drive or walk, a drain line may be needed. That is trench work, and the same crew can trench drainage lines as part of a grading job. Be careful not to send more water onto a neighbour than they already get. If in doubt, ask your town before changing where water leaves your lot.
Cut, fill and pack in layers
The dirt to build the new slope usually comes from the yard itself. High spots are cut down and that dirt fills the low ones. If there is not enough, clean fill is brought in. If there is too much, the extra is hauled away.
Fill goes down in thin layers, each one packed before the next goes on. Dumping a foot of loose dirt into a low spot and raking it smooth looks fine for a month and then sinks. Silty and clay soils common in central Illinois pack well when they are slightly damp, and badly when they are soaked, so timing matters.
Topsoil, seed and the first rains
Once the shape is right, the surface gets a layer of topsoil so grass can root. Fill dirt makes a solid base but grows poor turf. The guide on fill dirt vs topsoil explains why the two do different jobs.
Seed or sod as soon as the final grade is done. Bare soil on a new slope can wash in the first heavy rain, which is why many people grade in late summer and seed in early fall. Watch the yard through the first few storms. Small low spots can be topped up by hand before the grass fills in.
When to call in a machine
A wheelbarrow and a rake can fix a small low spot or rebuild a few feet of slope at the house. Anything bigger gets heavy fast. A whole yard re-grade means moving and packing a lot of dirt, and it is easy to make the slope worse with hand tools.
A skid steer or small dozer can cut, fill and smooth a yard in a fraction of the time and pack the fill properly as it goes. If you would rather hand the job over, grading and dirt work is what 3D does. Jon will look at the yard and quote it for free. The guide on yard grading cost explains what moves the price.
The Short Version
- Watch the yard in a rain before moving any dirt.
- Slope the ground away from the foundation and ask your building department for the local minimum.
- Give the water a route off the lot with a swale or a drain line.
- Pack fill in thin layers so the new grade does not sink.
- Finish with topsoil and seed quickly so the slope does not wash.
Quick Answers
How do I fix drainage in my yard?
Find where the water collects, reshape the ground so it falls away from the house, and give the water a path off the lot. Some yards also need a drain line where the ground is too flat to carry the water on its own.
Can I grade my yard myself?
Small fixes, yes, with a shovel, rake and some fill. A full re-grade involves moving and packing a lot of dirt, and a machine does it faster and packs it better.
What are the main drainage solutions for a yard?
Regrading the slope, shaping a swale, extending downspouts and, where needed, a buried drain line. Most wet yards are fixed by getting the grade right first.
What kind of dirt is used to regrade a yard?
Clean fill builds the shape and the slope. Topsoil goes on the surface so grass can grow.
See our grading & dirt work service or call (217) 710-0606.