How to Grade a Yard Away From the Foundation, Step by Step

The cheapest drainage system in the world is gravity, and grading is how you point it in the right direction. If the ground around your house slopes away from the foundation, rain leaves on its own. If it slopes toward the house, or sits flat, water lingers beside the slab and soaks into clay that already moves with the weather.

This guide shows you how to grade a yard away from the foundation: how to measure what you have, how much slope you need, what you can do with a shovel and a rake, and when the job is bigger than a weekend. It is written for clay-soil lots in and around Pflugerville, where small slope mistakes cause big puddles.

Why grading comes first

Pipes, basins, and emitters are all useful, but they only collect water that reaches them. Grading decides where water goes before any hardware gets involved. A well-graded lot may need no drains at all. A poorly graded lot with expensive drains still floods, because water never reaches them.

Grading also matters for your foundation. Slabs on expansive clay respond to moisture changes in the soil around them. Water that sits near the edge of the slab changes the soil moisture there, while soil farther away stays different. Keeping surface water moving off the lot reduces those swings. We explain the soil side in how Blackland Prairie clay affects yard drainage.

What slope do you need?

The model International Residential Code asks for the ground around a house to fall at least 6 inches within the first 10 feet. That is a 5 percent slope. Where lot lines, walls, or other barriers make 10 feet of space impossible, the code allows a 5 percent slope measured to a drain or swale that carries water away. Swales themselves should generally have a minimum slope of about 2 percent, and paved surfaces within 10 feet of the house should fall about 2 percent away from it.

Local codes can differ from the model code, and your subdivision may have a drainage plan on file. Ask your city or your HOA what applies to your lot instead of assuming. This post is general guidance and not a code review.

A few rules of thumb:

First 10 feet: about 6 inches of fall, or 0.6 inches per foot.
Beyond that: a gentler slope of at least 1 to 2 percent is usually enough to keep water moving across grass.
Siding and brick: keep soil at least a few inches below the siding or weep holes. Soil piled against the wall can trap moisture and invite termites.

Tools you will need

You do not need a surveyor. Gather:

A 4-foot or longer level, or a 6 to 8-foot straight board and a small level
A tape measure
Wooden stakes and string
A line level, or a laser level if you have one
A shovel, a garden rake, and a wheelbarrow
Marking paint or flags

Before you dig any deeper than a few inches, call 811. Texas requires notice at least two business days before digging, not counting weekends and holidays, and the request is free. See call 811 before digging in Texas.

Step 1: Map where water goes today

Pick a rainy day and watch. Make a rough sketch of the lot and draw arrows for every direction water moves. Mark:

Where roof water lands
Where puddles form
Where water leaves the lot
Any swales, drains, or low corners

If you cannot wait for rain, use a garden hose at a low flow in a few spots and watch the paths.

Step 2: Measure the slope near the foundation

Choose several spots along each wall. At each one:

Drive a stake into the soil right next to the foundation, and a second stake 10 feet straight out from it.
Tie a string between the stakes at the same height as the soil at the first stake. Use a line level to make the string level.
Measure from the string down to the soil at the second stake.

That measurement is your fall. If the second stake has 6 inches or more of drop, you are in good shape. If it is 2 inches, you need more. If the soil is higher at the far end, the slope runs toward the house.

Record results for each wall. Corners and areas under downspouts deserve extra stakes.

Step 3: Find the problem areas

Typical trouble spots include:

A bed of soil or mulch piled against the wall. Flower beds often rise against the brick. Water trapped behind landscape edging has nowhere to go.
Settled backfill. When builders backfilled around the slab, the soil sank over time and created a trench.
A patio or walkway that tilts toward the house. Hard surfaces need their own fix.
A flat strip along one side of the house where side-yard fences block flow.
A swale that has silted in.

Mark each with paint or a flag.

Step 4: Plan the new slope

Decide where the water should go. Options include:

Out to the street or curb. The simplest for many suburban lots, if the front yard slopes that way.
Into a shared swale between lots, if one exists and your city or HOA allows its use.
Into a catch basin or drain at a low point on your lot, with a pipe to an approved outlet.
Toward the back of the lot, if there is a rear drainage easement or open space.

Always send water to a place that is allowed. Texas Water Code section 11.086 says you may not divert or impound surface water in a way that damages a neighbor’s property. Our guide on Texas Water Code 11.086 explained covers the basics. If your grading plan changes where water leaves your lot, talk with a lawyer if you are unsure.

Step 5: Choose the right fill

This part matters in clay. Do not fill low spots with the same sticky clay if you can avoid it.

Use clean fill dirt or a sandy clay loam near the house. It is easier to shape and less likely to crack as much.
Avoid pure sand against the foundation. It lets water flow straight to the slab.
Skip topsoil as your main fill. Topsoil holds water. Use it only as a thin top layer for grass.
Compact in layers. Add 3 to 4 inches at a time and tamp each layer. Loose fill settles later and recreates the dip.

Step 6: Build the slope

Work from the house outward.

Pull back mulch, stones, and edging from the area along the wall.
Remove grass in the strip you are regrading, or cut it into sod pieces and set them aside.
Add fill in thin lifts, tamping as you go, until the grade drops about 6 inches over the first 10 feet.
Check your slope with the board and level as you work.
Shape the surface so water flows without pooling. A slightly crowned shape (a gentle ridge) is better than a dished one.
Lay sod back down or seed, and keep it moist so it knits quickly.

Make the change gradual. A sudden hump near the wall can send water sideways into a neighbor’s yard.

Step 7: Fix the low spots

Fill dips with compacted soil, a little at a time. Over a few months, they may sink again, so expect to top them up. If a dip keeps returning, there may be a pipe, a void, or a buried stump below, and the fix may be bigger than topdressing.

For a bowl in the middle of a yard that cannot be graded out, a catch basin with a buried pipe to an outlet is often the answer. See our page on catch basins and channel drains.

Step 8: Check your hard surfaces

Grading is not only soil. Patios, sidewalks, and driveways that tilt toward the house send water straight to the slab. A sunken slab may be raised back to the right pitch using polyurethane foam or older mudjacking, without tearing it out. We compare methods in foam leveling vs mudjacking, and our page on concrete slab leveling explains what is involved.

Step 9: Deal with roof water

A perfectly graded yard still floods if downspouts empty into one spot. Extend or bury downspout lines so water lands on the new slope, not at the base of the wall. Our underground downspout drains page describes the buried option.

Common mistakes

Piling soil too high against the house. Keep soil below siding or weep holes.
Forgetting about trees. Roots are important, and piling soil against a trunk can harm it. Taper fill away from the trunk and ask an arborist if a large tree is involved.
Creating a dam. A new berm that blocks old water flow can flood the next yard.
Skipping compaction. Loose fill settles.
Covering the slab edge. Some slabs have a visible edge that should stay exposed for termite inspection. Do not bury it.
Working in saturated clay. Wet clay turns into mud that compacts poorly. Wait for drier ground.

When grading is not enough

Some lots cannot be regraded to meet the target slope. A house that sits low on its lot, a lot that borders a higher neighbor, or a tight side yard with only a few feet between the house and a fence can all block it.

In that case, you can combine grading with:

A swale along the side yard
A French drain to intercept water coming from above, read French drain installation
A catch basin with a pipe to an outlet
A retaining wall with a drain behind it

Larger regrades also need heavier equipment. Our yard drainage and regrading page describes projects like those.

How long does a regrade last?

Clay moves, so slopes drift. Expect to check the grade every year or two, especially after drought summers when the soil cracks and again after wet spring seasons. Keep an eye on the soil level beside the slab, and top up as needed.

Foundation signs such as diagonal cracks above doors, sticking doors, or gaps at the corners of the house are not a grading problem alone. A structural engineer or foundation repair company should evaluate those. We do not perform structural foundation repair.

Local notes

In Pflugerville, many lots have a shared rear swale or a drainage easement. Do not fill or plant in one without checking your plat and your city or HOA rules. Pflugerville sees about 35 inches of rain in an average year, often in intense bursts, so your slope has to work during a storm, not only in a drizzle.

In Round Rock, older neighborhoods sometimes have mature trees and uneven lots, and newer ones may have tighter setbacks. In both cases, measure first.

Ready to get it right?

If your measurements show less than 6 inches of fall, or if you cannot find a place for the water to go, you do not have to guess. Request a free estimate and send us your sketch and measurements, and we will tell you what grading, drains, or both would take.