D.C. Mun. Regs. r. 11-361
An art gallery shall be permitted as a special exception in an R-5 District if approved by the Board of Zoning Adjustment under § 3104, subject to the provisions of this section.
The art gallery shall be located and operated so that it is not likely to become objectionable to adjoining and nearby property because of objectionable noise, pedestrian and vehicular traffic, hours of operation, or other objectionable conditions.
The Board shall consider, and regulate, if necessary, the anticipated frequency, number of attendees, and other characteristics of show openings or other group gatherings.
Adequate off-street parking, but not less than that required by chapter 21 of this title, shall be provided to accommodate occupants, employees, and visitors likely to come to the gallery by automobile.
The proposed use shall not adversely affect the present character or future development of the surrounding area.
The Board may require special treatment in the way of design, screening of buildings and parking, signs, exterior and interior lighting, or other requirements it deems necessary to protect adjacent and nearby properties.
D.C. Mun. Regs. r. 11-361