D.C. Mun. Regs. tit. 11, r. 11-K230
The maximum permitted FAR in the SEFC-4 zone shall be 0.5.
FAR shall be the gross floor area of all buildings and structures located on land and any associated permanent structure located on, in, or over water, other than a floating home, divided by the total area of the lot.
The FAR on a lot used exclusively for recreational use, marina, yacht club, or boathouse buildings and structures shall not exceed 0.75.
The gross floor area of existing Building 173 shall not count toward any FAR computation. The second story of Building 173 may be used for general office purposes on an interim basis of not more than twenty (20) years from the date of the initial certificate of occupancy for this use; provided that any such office space is suitably designed for future occupancy by retail uses and to not adversely impact ground floor retail uses.
Two (2) or more lots, whether contiguous or non-contiguous, within the SEFC-4 zone may be combined for the purposes of allocating density as provided for and limited by Subtitle K § 230.7, in accordance with the procedures outlined in Subtitle K § 240.
A lot or lots in the SEFC-4 development area may receive and use density allocated from a lot or lots in the SEFC-4 open space area, subject to all other applicable area restrictions. If a single lot is included within both geographic areas, the portion of the lot in the SEFC-4 development area may use the unused density from the portion of the lot in the SEFC-4 open space area.
D.C. Mun. Regs. tit. 11, r. 11-K230