An accessory use or structure shall be permitted in association with a principal residential structure provided that the following requirements are met:
(a) Maximum building footprint, building height, eave height, finished accessory structure attic floor area maximums, and functional dormer allowance shall be as follows:
Lot Size: | Maximum Building Footprint | Maximum Building Height | Maximum Eave Height | Maximum Finished Accessory Structure Attic Floor Area to Base Floorplate Ratio | Functional Dormer Special Permit Requirement |
Less than 6,000 square feet | 624 square feet | 18’ | 9’ | 50% | Special permit required |
6,000 to 13,999 square feet | 624 square feet | 18’ | 9’ | 50% | Special permit required |
14,400 square feet or greater | 720 square feet | 20’ | 10’ | 50% | Special permit not required |
24,000 square feet or greater | 936 square feet or 35% of the primary structure floorplate | 25’ | 14’ | 75% | Special permit not required |
(b) The width of the accessory use or structure may not exceed:
(1) Sixty percent (60%) of the lot width in the instance of detached garages.
(2) Forty percent (40%) of the lot width in the instance of other accessory structures or uses.
(3) No accessory structures combined may exceed sixty percent (60%) of the lot width.
(c) Special permits for functional dormers shall be based upon the following considerations:
(1) The extent to which proposed dormers would face onto adjacent property; windowed dormers that face inward or onto an alley are preferred over windowed dormers facing onto adjacent property.
(2) The setback of the proposed accessory structure; setbacks in excess of district requirements provide a greater distance between adjacent properties and uses and, in instances where windowed dormers face onto adjacent property, are desirable.
(3) The design and massing of dormers facing onto adjacent property.
(d) Dormers shall be designed based upon the following design requirements:
(1) Dormers may not occupy more than fifty percent (50%) of the eave length on either side of a gabled structure and must be recessed a minimum of two feet behind the first floor exterior walls.
A. Special permits may be sought for dormer exterior walls that are even with the first floor exterior wall, based upon architectural appropriateness.
(2) Any dormer with an individual width in excess of thirty percent (30%) of the eave length must face the interior of the lot.
(3) Dormer ridge height shall be at least one foot below primary ridge height.
(4) The design of the structure shall take into account the balance of any dormers between sides of the structure.
(e) In the R-12 zoning district, maximum building footprint of the accessory use or structure shall be the lesser of 312 square feet per dwelling unit or thirty-five percent (35%) of the building footprint of the principal use or structure.
(f) It shall not be used as a dwelling unit, and may not contain more than two of the following elements: a bedroom; a kitchen; or a bathroom.
(g) Accessory structure and use placement and design shall be based upon the following criteria:
(1) Accessory structures and uses shall be permitted only in the rear yard and shall be at least three feet from all property and right-of-way lines, provided that ample yard space is left open for the entrance and use of fire protection equipment.
(2) Accessory structures and uses with outward facing dormers shall be set back at least ten feet from property lines.
(3) Detached garages shall not be located less than ten feet from a principal structure.
(4) Detached garages accessible from an alley must demonstrate adequate turn-in radius to allow for vehicular ingress and egress.
(5) For corner lots in residential districts, accessory uses and structures shall be located a minimum of five feet farther back from the side street than the principal structure is allowed.
(6) A garage must be able to functionally accommodate vehicles, with operational garage bay doors and adequate depth for standard sized vehicles.
(Ord. 29-16. Passed 11-15-16; Ord. 11-21. Passed - -21.)