All buildings or structures erected on or after May 12, 1958 shall be provided with parking spaces to the extent specified in § 2101, except as permitted by §§ 2102 through 2108 and for structures erected on Kingman and Heritage Islands for which the construction of parking spaces shall be prohibited except for handicap spaces.
No application for a building permit for a building or structure to be erected on or after May 12, 1958 shall be approved unless there is included with the plans for the building or structure a parking plan showing the location, dimensions, and grades of all parking spaces and approaches thereto in accordance with the provisions of this chapter.
No certificate of occupancy shall be issued for the use of a building or structure erected on or after May 12, 1958, unless the required parking spaces have been provided in accordance with the parking plan provided for in the approved building permit.
Except for historic resources as defined in § 2120.2, when the use of a building or structure is changed to another use that requires more parking spaces than required for the use existing immediately prior to the change or, if the building or structure is vacant, the use that existed immediately prior to the vacancy, parking spaces shall be provided for the additional requirement in the amount necessary to conform to § 2101.
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Except as provided in § 2120.3, when the intensity of use of a building or structure existing before May 12, 1958 is increased by an addition of employees, dwelling units, gross floor area, seating capacity, or other unit of measurement specified in § 2101, parking spaces shall be provided for the addition, subject to §§ 2100.7 through 2100.9.
Parking spaces shall not be required for the addition unless the addition increases the intensity of use of the building or structure by more than twenty-five percent (25%) of the aggregate.
Parking spaces for the addition need not exceed the amount of parking spaces that would be required for the entire structure as proposed if constructed new.
The determination of the increase of intensity of use shall be based on the total increase in intensity of use the structure undergoes on or after May 12, 1958, whether the total increase occurs at one time or in successive stages.
In the case of a building or structure for which the Zoning Regulations now require more parking spaces than were required when the building or structure was built, the following shall be required:
D.C. Mun. Regs. tit. 11, r. 11-2100