Amends GS 143-214.7(b3) (pertaining to stormwater runoff rules) to specify that stormwater runoff rules and programs cannot require owners of private property that includes small scale residential development to install new or increased stormwater controls for preexisting development or for redevelopment activities that do not remove or decrease existing stormwater controls. (Currently, statute does not include small scale residential development.) Defines small scale residential development to mean single-family homes, townhomes, and multiunit residential with four or fewer units.