Conversion of a non-residential building or other structure existing prior to May 12, 1958, to an apartment house and not meeting one (1) or more of the requirements of § 330.7, shall be permitted as a special exception in an R-4 Zone District if approved by the Board of Zoning Adjustment under § 3104, subject to the provisions of this section, except that no special exception relief shall be available from the requirements of § 330.7(a).
Any addition shall not have a substantially adverse effect on the use or enjoyment of any abutting or adjacent dwelling or property, in particular:
In demonstrating compliance with § 337.2, the applicant shall use graphical representations such as plans, photographs, or elevation and section drawings sufficient to represent the relationship of the conversion and any associated addition to adjacent buildings and views from public ways.
The Board of Zoning Adjustment may require special treatment in the way of design, screening, exterior or interior lighting, building materials, or other features for the protection of adjacent or nearby properties, or to maintain the general character of a block.
D.C. Mun. Regs. tit. 11, r. 11-337