The design standards for rowhouse dwellings in the underlying zoning district apply to a Rowhouse Mixed-Use Overlay District. Conversion of a rowhouse to a use allowed by <cite data-path="|32|§12-1003">§ 12-1003 {“Use regulations”} of this subtitle</cite> requires design review. This conversion is subject to the following design and performance standards. The ground floor of the structure may be used for a non-residential use listed in <cite data-path="|32|§12-1003">§ 12-1003 {“Use regulations”} of this subtitle</cite>. The upper floors of the structure may be used for office uses related to that ground-floor business, as long as the upper floors are not open to the public. For all other non-residential uses, conditional-use approval by the Board of Municipal and Zoning Appeals is required for the use of the upper floors of a structure for the non-residential uses listed in <cite data-path="|32|§12-1003">§ 12-1003 {“Use regulations”} of this subtitle</cite>. The residential form of the building must be generally maintained. However, ground-floor windows and doors may be enlarged for improved visibility and access. The principal entrance must be a direct entry from the primary abutting street. No additional off-street parking is required. Outside storage or display is prohibited. All business, servicing, processing, and storage uses must be located within the structure. Signs are limited to wall, projecting, window, awning, and temporary a-frame signs only. Ord. 16-581 Ord. 17-015 Ord. 18-216