1553.1An existing nonresidential use with a valid Certificate of Occupancy as of July 29, 1994, shall be considered a conforming use and may expand by up to ten percent (10%) of its gross floor area as a matter of right under the provisions of the R-1-B District; provided, that the following requirements are met:
(a) No additional land area or subdivision of lots is involved in the expansion; and(b) The ten percent (10%) expansion limit shall be a total limit on expansion based on the gross floor area of the building as of July 29, 1994.1553.2A proposed new nonresidential use or an expansion of an existing nonresidential use in excess of ten percent (10%) of gross floor area shall be permitted as a special exception, if approved by the Board of Zoning Adjustment after public hearing, in accordance with § 3104 and subject to the following requirements:
(a) The nonresidential use is capable of being established and operated without adversely affecting the use and enjoyment of neighboring and nearby properties due to traffic, noise, design, or other objectionable conditions; and(b) There shall be adequate, appropriately located, and screened off-street parking sufficient to provide for the needs of the maximum number of occupants, employees, congregants, and visitors who can use the facility at one time; provided:(1) The number of parking spaces provided shall be not less than the number required by chapter 21 of this title and shall be located and designed so that they have the least objectionable effects on contiguous or nearby property because of noise, traffic, or other objectionable conditions;(2) Parking spaces and driveways providing access to them shall not be located in a required side yard, or on the lot between the principal building and a street right-of-way, nor in public space abutting the lot;(3) If five (5) or more open parking spaces are provided, the parking spaces shall be screened from all contiguous residential property by a wood fence or a wall made of brick or stone 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 are at least forty-two inches (42 in.) in height when planted; and(4) Any lighting used to illuminate open parking spaces shall be so arranged that all direct rays of lighting are confined to the surface of the paved area devoted to parking; any lighting provided shall be the minimum necessary for reasonable visibility by drivers and for security purposes.1553.3Any expansion, renewal of time limits, or other changes to an existing use permitted by special exception in the R-1 District provisions shall continue to be governed by the R-1 provisions rather than those of this overlay district.
D.C. Mun. Regs. r. 11-1553
Final Rulemaking published at 41 DCR 5045, 5047 (July 29, 1994); as amended by Final Rulemaking published at 47 DCR 9741-43 (December 8, 2000), incorporating by reference the text of Proposed Rulemaking published at 47 DCR 8335, 8464-65 (October 20, 2000)