The purposes of the Capitol Interest Mixed-Use zones (MU-23, MU-24, and MU-26) are to:

  • Promote and protect the public health, safety, and general welfare of the U.S. Capitol precinct and the area adjacent to this jurisdiction, in a manner consistent with the goals and mandates of the United States Congress in Title V of the Legislative Branch Appropriation Act, 1976 (Master Plan for Future Development of the Capitol Grounds and Related areas), approved July 25, 1975 (Pub. L. No. 94-59, 89 Stat. 288), and in accordance with the plan submitted to the Congress pursuant to the Act;
  • Respect the importance of and provide sufficient controls for the area adjacent to the U.S. Capitol;
  • Provide particular controls adjacent to properties having a well-recognized general public interest; and
  • Restrict some of the permitted uses to reduce the possibility of harming the site, building, or district to be protected.

The Capitol Hill Commercial Mixed-Use zones include the MU-25 and MU-26 zones and are intended to:

  • Encourage the adaptive use and reuse of existing buildings, many of which are located in the Capitol Hill Historic District, particularly with respect to the portions of the buildings that exceed the commercial floor area ratio permitted in the underlying zone districts;
  • Concentrate non-residential uses in commercial zone districts in certain areas of Capitol Hill, thereby enhancing and protecting the residential character of the areas surrounding the commercial zone districts and relieving pressure to use properties zoned residential for commercial uses; and
  • Provide appropriate incentives for new infill construction that is compatible with the Capitol Hill Historic District and its predominance of low-scale row house structures

The MU-26 zone is intended to permit moderate-density mixed-use development.

Development Standards
Floor Area Ratio (max.)1 Height (ft.) Penthouse Height (ft.)/Stories Lot Occupancy
Rear Setback (ft.)2, 3, 4 Side Setback (ft.) Green Area Ratio Zoning Regulation Reference
MU-26 1.8 40
(3 Stories)
(1 story)
75 15 ft. If a side yard is provided, it shall be at least 2 in. wide for each 1 ft. of height of building, but no less than 5 ft. 0.30 Subtitle G, Chapter 7
2.16 (IZ) 8 ft. for attached or semi-detached dwelling.
2.5 (non-residential)

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

1 In the MU-25 and MU-26 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.
2 In the MU-24 through MU-26 zones, a horizontal plane may be established at 25 ft. above the mean finished grade at the middle of the rear of the structure for the purpose of measuring rear yards.
Where a lot abuts an alley for that portion of the structure below a horizontal plane described in Subtitle G § 705.4 from the center line of the alley to the rear wall of the portion; and for that portion of the structure above the horizontal plane described in Subtitle G § 705.4, from the rear lot line to the rear wall of that portion immediately above the plane;
Where a lot does not abut an alley, the rear yard shall be measured from the rear lot line to the rear wall of the building or other structure.