After a storm, watch the first few feet around your house. Does water move away, or does it run toward the foundation, a window well, or a basement entrance? A small change in surface elevation can decide where a large amount of roof and yard runoff collects.

This guide covers seven grading mistakes homeowners can spot and the questions to ask before paying for a drain. These are general examples, not descriptions of unnamed customer projects.

Why does the slope beside a house matter?

Surface water follows the available low path. If the low point is beside the foundation, the soil there can stay wet and water can find openings in the wall, window well, or floor-wall joint. The U.S. Department of Energy recommends grading the land so water moves away from the foundation and using a swale or drain where space is limited. Its guidance describes a fall of about six inches over the first ten feet as a benchmark for new-home site drainage, but an existing yard must be assessed with its actual doors, property lines, and discharge route. See DOE grading guidance.

Seven lawn-grading mistakes to check

1. The surface slopes toward the wall

Look for puddles, soil washout, or a wet band along the house after rain. Do not judge the grade from the grass alone: use a level or a measured string line. The repair may involve rebuilding the slope, but the water still needs somewhere safe to go.

2. Mulch or a raised bed blocks the water path

Repeatedly adding mulch can form a small berm that holds water beside siding, brick, or a window well. Check whether landscaping covers wall details meant to stay exposed. Remove excess material where appropriate and confirm that the finished grade carries water away rather than simply looking tidy.

3. New fill is placed without a stable base

Loose fill can settle and recreate a low spot. A grading plan should identify the soil used, how it will be placed and compacted, and the final slope after restoration. A thin topsoil layer for planting is different from a stable base that holds the grade.

4. The contractor checks the slope before, but not after, the work

Drainage is judged by the finished elevation. Ask for the slope and outlet to be checked after backfill, compaction, stone, or landscaping is complete—and again if settling becomes visible. A buried trench with reverse fall can undermine an otherwise good-looking yard.

5. A patio, walk, or deck approach traps water

Hardscape may direct runoff across a basement entry or hold it against the foundation. Where there is not enough room to regrade, a properly placed channel drain, catch basin, or swale may intercept that flow. The chosen collection point and discharge must be shown on the plan.

6. Downspouts empty onto the newly graded area

Even a good surface slope can be overwhelmed when roof runoff is released beside the wall. Trace where each downspout ends. If buried, the roof-water pipe should have an identified outlet; it should not simply disappear into the ground or be assumed to be a perforated yard drain.

7. The design moves water onto someone else

A fix is not complete if it merely transfers runoff to a neighbor, sidewalk, or another vulnerable part of the home. Local rules and site conditions govern acceptable discharge. Confirm the destination before excavation.

When is regrading enough—and when is a drain needed?

Regrading may be enough when the issue is surface runoff and there is room for a stable slope and safe outlet. A yard drainage system may be needed for a concentrated low point or water moving through the soil. A shallow grading tile or exterior French drain intercepts a different water path than a drain located at footing elevation; do not use the names interchangeably.

If the basement is already wet, identify where the water enters. The right plan might include grading, downspout routing, a targeted exterior drain, waterproofing, or—where justified—an interior collection system. It is not sound to prescribe a sump pump or a full perimeter drain from a lawn photo alone.

Frequently asked questions

How can I tell if my yard slopes the wrong way?

Photograph runoff during rain, note puddles beside the wall, and measure elevations from the foundation outward with a level or string line. A professional can check the whole route, including the outlet.

Will adding more dirt beside the house fix the problem?

Not by itself. Extra soil can cover cladding or window-well details, settle later, or push water toward another opening. The material, compaction, finished slope, and discharge need to work together.

Can grading alone stop basement water?

It can reduce a surface-water problem when that is the actual source. It cannot be assumed to stop every basement leak, especially when water also enters through a wall defect, a window well, or below the slab. Inspect the water path before promising a result.

Should I install a French drain before fixing the grade?

Often the surface route should be addressed first or designed together with the drain. A pipe cannot compensate for every reverse slope or downspout dumping water against the foundation.

How much does lawn regrading cost?

It depends on area, access, soil volume, compaction, landscaping and hardscape restoration, and whether a drain or discharge line is necessary. Request an itemized scope rather than relying on a generic online price range.

Plan around the actual water path

DMV Waterproofing is engineer-founded and uses in-house crews across DC, Maryland, and Northern Virginia. If your yard directs water toward the foundation, request an inspection and bring photos taken during rain. We can review grading, downspouts, collection points, and the final discharge before recommending work.