Solving Drainage Issues in a Low Side Yard with Basement Windows

A side yard that is virtually level, hosts two AC units, and has ground-level basement windows presents a classic drainage challenge. After storms, water pools deeply enough to threaten the AC units and seep toward the windows, and the ground stays wet for days.

Why Site Assessment Is Critical

Effective drainage solutions depend entirely on the specific topography, soil type, and existing infrastructure. Without a clear view of the site—ideally photos or an on-site visit during rain—it's impossible to prescribe the exact fix.

Potential Solutions

• Surface drain system: A series of catch basins connected to solid pipe can capture and convey water away from the problem area.
• Regrading: Creating a positive slope (minimum 2%) away from the foundation toward a suitable outlet (street, storm drain, or lower yard area).
• French drain: A perforated pipe surrounded by gravel and filter fabric, installed along the problematic perimeter, can intercept subsurface water.
• Window well improvements: Ensure window wells have proper drainage at the bottom and are sealed at the foundation.

Next Steps

If possible, provide photos of the yard during or after a rain event. A local landscape contractor or drainage specialist can then design a system tailored to your constraints. In some poorly designed subdivisions, a sump pump may be the only reliable solution, but surface drainage modifications should be explored first.