My project involves redevelopment of an existing commercial site. Do I need a permit?

Most commercial redevelopment projects require a permit from the District and some level of stormwater management. If the project results in a site with 1 acre or more of impervious surface, then full rate control, water quality treatment and volume control requirements apply. If the project results in a site with less than 1 acre of impervious surface, then rate control and water quality treatment requirements may be waived if volume control requirements are incorporated to the maximum extent possible.

These requirements apply to the redevelopment area only, unless more than 50% of the site is redeveloped. If more than 50% of the site is redeveloped, then the above stormwater management requirements apply to the entire site.