French Drain vs. Dry Well: Which Drainage Fix Do You Need?
How to choose the right drainage solution for wet lawns, standing water, and water intrusion in Fairfield County, CT.
Standing water and saturated lawns are common problems across Fairfield County — especially in towns like Easton, Weston, Fairfield, and Wilton where clay soils and sloped terrain create drainage challenges. Two of the most common solutions are French drains and dry wells, but they work differently and suit different problems.
French Drains — What They Are
A French drain is a perforated pipe buried in a gravel trench that collects and redirects water away from problem areas. Water enters the perforated pipe and flows by gravity to a discharge point — usually a daylight outlet at the property edge, a ditch, a storm drain, or a dry well.
Best for: Surface water pooling, soggy lawn areas, water collecting along a foundation or driveway, water migrating from a neighbor's property.
Cost range: $1,500–$6,000+ depending on length, depth, and discharge location.
Dry Wells — What They Are
A dry well is an underground chamber (precast concrete or perforated plastic) that collects water and allows it to slowly percolate into the surrounding soil. They're typically fed by downspouts, sump pumps, or French drains.
Best for: Downspout water management, sump pump discharge, end-point for a French drain system.
Cost range: $800–$3,500 depending on size and soil conditions.
Fairfield County Soil Considerations
Much of Fairfield County has clay-heavy soils that drain slowly. A dry well may not work well where soil percolation is poor — French drains that discharge to a lower elevation or storm system are often more effective. A site evaluation from a drainage contractor is valuable before deciding.