These requirements are contained within the District of Columbia Office of Zoning (DCOZ) Off-Street Parking Requirements (Chapter 21).
- 2117.11: Landscaping with trees and shrubs shall be provided for all open parking spaces provided on a lot where there are more than ten (10) open parking spaces provided collectively as accessory to any building or structure. The landscaping shall cover a minimum of five percent (5%) of the total area devoted to parking, including aisles and driveways. The landscaping shall be maintained in a healthy, growing condition.
- 2117.12: The open parking spaces shall be screened from all contiguous residential property located in an R-1, R-2, R-3, R-4, R-5-A, or SP District by a solid brick or stone wall at least twelve inches (12 in.) thick and forty-two inches (42 in.) high or by evergreen hedges or evergreen growing trees that are thickly planted and maintained and that are at least forty-two inches (42 in.) in height when planted.