D.C. Mun. Regs. tit. 11, r. 11-C1309
An antenna tower or monopole, either alone or in conjunction with a studio or in conjunction with the erection, alteration, or use of buildings for transmission or reception equipment, shall be permitted in the PDR-4 zones as a matter of right; provided that the antenna tower or monopole complies with the conditions set forth in this section.
An antenna tower or monopole shall be set back a minimum horizontal distance equal to its total height as measured from the ground, from any residentially developed or zoned property.
Except as provided in Subtitle C § 1309.2, each part of an antenna tower or monopole shall be set back from each lot line a minimum distance equal to the greater of twenty feet (20 ft.); or a distance of at least one-third (1/3) of the total mounted height.
The height of an antenna tower or monopole shall not exceed the maximum height permitted for structures plus thirty feet (30 ft.) as a matter of right. Any antenna tower or monopole in excess of this height may be permitted if approved by the Board of Zoning Adjustment subject to the conditions of Subtitle C § 1312, subject to Subtitle C § 1309.5.
Any antenna tower or monopole with a height in excess of that permitted by the act of June 1, 1910 (36 Stat. 452), as amended, shall not be permitted, unless the height is approved by the Mayor or his or her designee.
A written statement shall be provided agreeing to design the proposed antenna tower or monopole for at least three (3) antenna arrays and to make the array space available on a commercial basis for collocation by any telecommunications service provider whenever unused by the initial telecommunications service provider(s) or the owner.
No signs of any kind, including advertisements, may be placed on an antenna tower or monopole, its equipment cabinet or its equipment shelter, unless necessary for the safety of the public.
D.C. Mun. Regs. tit. 11, r. 11-C1309