D.C. Mun. Regs. tit. 10, r. 10-C2508
Signs are not typically a prominent visual element on historic residential buildings. In order to preserve the character and setting of historic residential buildings, signage on these buildings and in historic residential areas shall not be visually intrusive, overwhelming, or incompatible with the significant historic characteristics of the particular building, site, and context.
Commercial advertising on historic property in residential and special purpose zoning districts shall comply at a minimum with the pertinent limitations in the D.C. Building Code. The Board may impose further limitations in size or other characteristics if necessary to achieve compatibility with a historic landmark or district.
Signage for a historic apartment building or an apartment building in a portion of a historic district zoned for residential use shall be limited to the name and address of the building.
The preferred location for apartment building signage is at the building entrance, either on a canopy, marquee, or adjacent flat wall surface. A small ground-mounted building identification sign may be permitted for a historic apartment building, an apartment building within a historic district, or historic property within a special purpose zoning district.
A permanent sign on historic property relating to the sale, rental, lease, or management of the premises is limited to two square feet (2 sq. ft.) in size.
Illuminated signage is discouraged in portions of a historic district zoned for residential use. Illumination may be permitted if it is determined acceptable for the specific building and setting. Any permitted illumination shall consist of soft, steady white light only.
D.C. Mun. Regs. tit. 10, r. 10-C2508