Fixing Negative Grading and Drainage Around a Home: Slopes, Swales, and Planting Solutions

Fixing Negative Grading and Drainage Around a Home: Slopes, Swales, and Planting Solutions

Land sloping toward the house in all directions, with road and driveway higher, causes puddling and basement moisture.

Grading Standards

• Minimum slope: 12″ drop per 100 ft away from foundation.
• Get free estimates from grading contractors (contractor directory) to benchmark DIY cost.

Key Actions

1. Reduce shade: Thin or remove trees on south/west sides to allow grass growth and reduce erosion.
2. Build up foundation: Raise soil to leave only 4–6″ of basement foundation exposed. Compact well.
3. Downspout extensions: Minimum 4 ft, directing water away from house.
4. Driveway diverter: Small berm or channel to redirect driveway runoff to side yard.
5. Drainage ditch/tile: If city won’t raise curb, install subsurface drain to rear of property.

Planting Plan

• Sunny areas: Kentucky bluegrass sod/seed.
• Shade areas: Shade-tolerant groundcovers (vinca, hostas, ferns) with edging to prevent invasion.

Resources

• Grading & Edging Guide
• Lawn Care Grading Article

Proper grading is the foundation of a healthy landscape.