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Dormers may be added to any residential building provided that zoning requirements and the following requirements are met.
(a) If dormers are added to an attic space which is part of the apartment below it, the attic floor shall not be considered an additional floor in terms of building height if all of the following apply:
(1) The total and dormered area does not exceed two-thirds of the floor area of the same dwelling unit on the floor immediately below, when counting all areas with a headroom of five feet or higher;
(2) The dormer addition does not exceed the height of the existing building ridge line or the maximum building height permitted by Table 13-48-030, whichever is higher;
(3) The existing roof configuration has not been altered along the street lot line and the street- facing dormer wall is held back at least 24 inches from the face of the wall below;
(4) The number of living levels, as defined in Section 13-4-010, shall not exceed three levels in Type II-C, IV-A and IV-B buildings, or four floors in Type III-B buildings.
(b) Along interior lot lines, dormers may be built with their outer wall flush with the existing wall below, provided, however, such construction complies with the Zoning Ordinance.
(c) Dormers built on a building of ordinary construction (Type III-B or III-C) may be built of one hour metal stud or fire retardant treated wood in lieu of masonry, provided it meets the applicable construction requirements of Chapter 13-60 and does not exceed the height and area limitations of Chapter 13-48.
(Prior code § 78.1-26; Amend Coun. J. 10-2-95, p. 8040)