How much does a rain garden cost?
Rain gardens cost about the same as other perennial flower gardens, and are less expensive than replanting annuals every year. The Calculator on this site will help you come up with an estimate, but the short story is that do-it-yourselfers can put in a garden for $3–5/square foot. Use a landscaper to plan and install, and you’re looking at $10–15/square foot or more. Plants are the single most expensive item.
