The Mixed-Use (MU) zones provide for mixed-use developments that permit a broad range of commercial, institutional, and multiple dwelling unit residential development at varying densities. The MU-4  zone is a mixed-use zone that is intended to be applied throughout the city consistent with the density designation of the Comprehensive Plan. A zone may be applied to more than 1 density designation.

The MU-4 zone is intended to:

  • Permit moderate-density mixed-use development;
  • Provide facilities for shopping and business needs, housing, and mixed uses for large segments of the District of Columbia outside of the central core; and
  • Be located in low- and moderate-density residential areas with access to main roadways or rapid transit stops, and include office employment centers, shopping centers, and moderate bulk mixed-use centers.
Development Standards
Floor Area Ratio (max.) Height (ft.) Penthouse Height (ft.)/Stories1 Lot Occupancy
Rear Yard (ft.) Side Yard (ft.) Green Area Ratio Zoning Regulation Reference
MU-4 2.5
50 12 except 15 for penthouse mechanical space 60 152 No side setback is required; however, if a side setback is provided it shall be at least 2 in. wide for each 1 ft. of height of building but no less than 5 ft.3 0.30 Subtitle G, Chapter 4
3.0 (IZ) N/A 1; Second story permitted for penthouse mechanical space 75 (IZ) 8 ft. for a single-family detached or semi-detached dwelling
1.54 (non-residential)

Use Permissions Courts Parking Inclusionary Zoning
Subtitle U, Chapter 5 Subtitle G § 202 Subtitle C, Chapter 7 Subtitle C, Chapter 10

Except as prohibited on the roof of a detached dwelling, semi-detached dwelling, rowhouse, or flat in Subtitle C § 1500.4.
2 See Subtitle G § 405.4 and 404.5 for measuring the rear yard.
Any portion of a building setback from the side lot line shall be considered a side setback and not a courtyard.
In the MU-4 and MU-5 zones, an existing building on a lot with an area 10,000 sq. ft. or less, may have a maximum density of 2.0 FAR for non-residential uses, provided the uses are located in the ground story and the story directly above the ground story. For new construction, any additional use is limited to 0.5 FAR.