No accessory building or structure shall be built on any lot on which there is not a principal building or structure.
A.
Accessory structures or uses shall not be located in the required front yard or within the front half of the side yard of any residential zone and may be erected anywhere within the required rear yard, except as provided herein:
(1)
In the R-1 and R-2 Zone Districts, patios may be located in any required rear or side yard. Decks must meet the yard requirement of the principal building to which they are attached. All other accessory structures or uses shall be set back minimally five feet from a side or rear property line. Accessory structures, other than patios and decks, which are greater than 150 square feet in area but no more than 325 square feet in area, shall be set back minimally 10 feet from side and rear property lines, and accessory structures which are greater than 325 square feet in area shall be set back minimally 15 feet from side and rear property lines.
(2)
Accessory structures not attached to the principal structure, such as sheds and detached garages, shall be set back minimally 10 feet from the principal building.
(3)
Light posts, mailboxes, fences, signs and retaining walls shall be permitted within the required front yard of any residential use. Off-street parking is also permitted in a front yard, restricted to the driveway area.
B.
No accessory structure or use in a residential zone shall exceed a height of 15 feet and 1 1/2 stories, except as provided in § 240-99, and as further provided for in the R-3, R-4 and R-5 Zones where parking decks shall not exceed 20 feet in height above grade.
C.
Accessory structures or uses in the R-1 and R-2 Zones shall not occupy an area greater than 10% of the area of the rear yard.
D.
Accessory parking structures or uses in the R-3, R-4 and R-5 Zones shall not occupy an area greater than 60% of the site. All other accessory features shall not occupy an area greater than 15% of the site.
E.
When an accessory structure or use is attached to the principal building, it shall comply in all respects with the requirements of this chapter applicable to the principal building or use.
F.
In the case of a through lot, no accessory structure or use shall encroach upon that 1/4 of the lot depth nearest each street upon which the lot has frontage.
G.
No accessory structure shall be used for human habitation.
H.
Accessory commercial uses in the R-4 and R-5 Zones shall be limited to laundry and dry-cleaning facilities, valet services and convenience store facilities which are designed for the exclusive use of the residents therein. Medical and dental offices shall be permitted but are limited to the lobby floor of the building. Parking to accommodate this office use shall be as prescribed by ordinance and shall be identified on site for said use.