D.C. Mun. Regs. tit. 11, r. 11-2115
Except as otherwise provided in this section, a required automobile parking space shall be a minimum of nine feet (9 ft.) in width and nineteen feet (19 ft.) in length, exclusive of access drives, aisles, ramps, columns, office or work areas and shall be striped according to the requirements of § 2117.3. Parking shall also be in compliance with the requirements of the District of Columbia Architectural Barriers Act of 1980, effective July 1, 1980 (D.C. Law 3-76; 12 DCMR art. 15).
Any accessory parking area or accessory garage containing twenty-five (25) or more required parking spaces may designate up to forty percent (40%) of the parking spaces for compact cars.
A compact car parking space shall be a minimum of eight feet (8 ft.) in width and sixteen feet (16 ft.) in length exclusive of access drives, aisles, ramps, columns, and office and work areas and shall be striped according to the requirements of § 2117.3.
Parking spaces shall be visibly marked as "compact car" or "small car" parking spaces and shall be placed in groups of at least five (5) contiguous spaces with access from the same aisle.
Except as provided in §§ 2115.6 and 2115.7, all parking spaces shall have a minimum vertical clearance of six feet, six inches (6 ft., 6 in.).
Where one hundred (100) or more parking spaces are provided, whether the spaces are required or not and whether the spaces are a principal use or an accessory use, at least five percent (5%) of the parking spaces shall have a minimum vertical clearance of seven feet, two inches (7 ft., 2 in.).
All entrances, exits, access aisles, ramps, and driveways providing access to parking spaces shall also have the minimum vertical clearances as prescribed in §§ 2115.5 and 2115.6, respectively.
All parking spaces requiring the seven foot, two inch (7 ft., 2 in.), vertical clearance shall be clearly marked for "Van Parking Only."
In a commercial building or structure located in a C-3-C, C-4, C-5 (PAD), SP, W, or CR District, where at least seventy-five (75) parking spaces are required according to the schedule of parking requirements under § 2101.1 and where parking spaces are provided within a parking garage, parking may be provided as set forth in §§ 2115.10 through 2115.18.
A minimum of two hundred eighty-five square feet (285 ft.2) of parking area shall be provided for each required parking space.
Parking space dimensional, size, design, and striping requirements stipulated under §§ 2115.1 through 2115.4, 2117.3, 2117.5, and 2117.6 may be waived; provided, that the parking is managed during a specified twelve (12) hour peak period to be determined by the D.C. Department of Transportation by employed attendants who park the vehicles using the parking facility.
A permanent sign shall be posted at each entrance in full view of the public that states: "Attendant assisted parking is required by the District of Columbia Zoning Regulations." The sign shall also state the hours during which attendant parking is required. The sign shall have a white background, with black lettering that is no less than two inches (2 in.) in height.
All parking areas and spaces provided under § 2115.9 shall be designed and operated so that sufficient access and maneuvering space is available to permit the parking and removal of any vehicle without moving any other vehicle onto public space.
Where aisles are provided, the aisles shall meet the design requirements stipulated in §§ 2117.5 and 2117.6.
All other requirements for parking, including but not limited to minimum height clearances and landscaping requirements, shall remain applicable.
In the event parking by attendants as required in § 2115.11 is discontinued, parking shall then be provided as otherwise required in these regulations. The applicant for a parking facility under this subsection shall submit a parking plan on a medium acceptable to the Zoning Administrator that demonstrates how parking shall be provided in the event the attendant parking is discontinued.
No individual area shall be considered a part of the required parking area where the minimum lesser dimension is less than seven feet (7 ft.) or where the minimum greater dimension is less than fourteen feet (14 ft.) in rectangular area, exclusive of column obstructions.
For the purpose of § 2115.9, a commercial building or structure shall include any building or structure where eighty percent (80%) or more of the gross floor area is devoted to a use other than a dwelling, flat, multiple dwelling, rooming or boarding house, community-based residential facility, or hospital.
D.C. Mun. Regs. tit. 11, r. 11-2115