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D.C. Municipal Regulations (Last Updated: September 13, 2017) |
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Title 11. ZONING REGULATIONS OF 2016 |
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SubTilte 11-B. DEFINITIONS, RULES OF MEASUREMENT, AND USE CATEGORIES |
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Chapter 11-B3. GENERAL RULES OF MEASUREMENT |
Section 11-B307. RULES OF MEASUREMENT FOR BUILDING HEIGHT: NON-RESIDENTIAL ZONES
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307.1In other than R, RF, RA, RC-1, CG-1 and D-1 zones, the building height shall be the vertical distance measured from the level of the curb, opposite the middle of the front of the building to the highest point of the roof or parapet or a point designated by a specific zone district.
307.2Unless otherwise restricted or permitted in this title, in those zones in which the height of the building is limited to forty feet (40 ft.), the height of the building may be measured from the finished grade level at the middle of the front of the building to the ceiling of the top story.
307.3In those zones in which the height of the building is limited to sixty feet (60 ft.), in the case of a building located upon a terrace, the height of the building may be measured from the top of the terrace to the highest point of the roof or parapet, but the allowance for terrace height shall not exceed five feet (5 ft.).
307.4Except as provided in Subtitle B § 307.6, where a building is removed from all lot lines by a distance equal to its proposed height above grade, the height of building shall be measured from the natural grade at the middle of the front of the building to the highest point of the roof or parapet.
307.5Except as provided in Subtitle B § 307.7, if a building fronts on more than one (1) street, any front may be used to determine the maximum height of the building; but the basis for the height of the building shall be determined by the width of the street selected as the front of the building.
307.6Except as provided in Subtitle B § 307.4, in those zones in which the height of building is permitted to be ninety feet (90 ft.) or greater, the height of buildings shall be measured from the finished grade level at the middle of the front of the building to the highest point of the roof excluding parapets not exceeding four feet (4 ft.) in height.
307.7When the curb grade has been artificially changed by a bridge, viaduct, embankment, ramp, abutment, excavation, tunnel, or other type of artificial elevation or depression, the height of a building shall be measured using the first of the following four (4) methods that is applicable to the site:
(a)An elevation or means of determination established for a specific zone elsewhere in this title;
(b)An elevation for the site that was determined prior to the effective date of this section by the Zoning Administrator, or the Redevelopment Land Agency, its predecessors or successors;
(c)A street frontage of the building not affected by the artificial elevation; or
(d)A level determined by the Zoning Administrator to represent the logical continuation of the surrounding street grid where height is not affected by the discontinuation of the natural elevation.