3510.1 For the purposes of applying general zoning requirements of this title:

(a) The WR-1, WR-7, and WR-8 zones shall be considered Residence zones and shall be subject to § 411; and

(b) The WR-2, WR-3, WR-4, WR-5, and WR-6 zones shall be considered Mixed Use or Commercial Zones and shall be subject to §§ 770.6-770.9 and 777.

3510.2 In the WR zone, the point chosen for measurement of height shall conform to the other provisions of this title, except that the point may be on either a public or private street.

3510.3 A penthouse constructed in accordance with the provisions of § 411 may be erected to a height in excess of that permitted, but shall not exceed the height, as measured from the surface of the roof upon which the penthouse sits, in the following table:

ZONE DISTRICT	MAXIMUM PENTHOUSE HEIGHT	MAXIMUM PENTHOUSE STORIES
WR-1, WR-6	Pursuant to §411.5	Pursuant to §411.5
WR-4, WR-5, WR-7	12 ft. except 15 ft. for penthouse mechanical space	1; second story permitted for penthouse mechanical space
WR-8	12 ft., except 18 ft. 6 in. for penthouse mechanical space	1; second story permitted for penthouse mechanical space
WR-3	20 ft.	1; second story permitted for penthouse mechanical space
WR-2	20 ft.	1 plus mezzanine; second story permitted for penthouse mechanical space

SOURCE: Final Rulemaking published at 62 DCR 12168 (September 4, 2015); as amended by Final Rulemaking published at 63 DCR 390 (January 8, 2016).