Any accessory structure or building shall have a maximum height of one habitable story or 20 feet, unless it meets the minimum setbacks for a principal building, in which case the maximum height for a principal building shall apply.

The maximum height requirements shall not apply to cranes or similar mechanical devices.

A minimum building height of 20 feet shall apply for any new principal building in the CBD District.

The maximum structure height specified for each district shall not apply to antenna and communications towers that meet the requirements of this title, water towers, clock or bell towers, steeples and religious symbols attached to places of worship, utility lines and poles and towers, elevator shafts, rooftop stairways, wind turbines that comply with this title, skylights, chimneys, heating/ventilation/air-conditional equipment, industrial mechanical equipment areas that are not occupied by humans, or other appurtenances usually required to be and customarily placed above the roof level and not intended for human occupancy. See also definition of "height" in § 1315.02.

Solar energy collection devices may exceed the maximum building height by six feet, provided the devices do not extend more than one foot above the top of the peak of a pitched residential roof.

Accessory structures and uses shall meet the minimum yard setbacks provided for in § 1305.01, unless otherwise provided for in this title, including the following subsections.

The minimum side and rear yard setback (other than along a street right-of-way) for a permitted detached one story structure with a maximum height of 16 feet that is accessory to a dwelling shall be three feet, except in the following cases:

The minimum side and rear yard setback for an accessory storage shed that is not accessory to a dwelling shall be 10 feet, except it shall be three feet for a lot line abutting a principal business use. These reduced setbacks shall only apply for storage sheds of less than 12 feet in height that are used to store types of materials, substances and equipment that would be typically found on a residential property, such as lawn mowers.

Vehicle parking shall not routinely occur on grass portions of a residential lot.

Vehicle parking shall not occur in a way that obstructs traffic on streets or alleys or that extends over a public sidewalk. Any parking space in front of a vehicle garage shall have a 20-foot length.

Where parking is required to be provided for residents (including in a garage), it shall be reserved for use of those residents and shall not be rented to nonresidents.

In the OI, RHD, or CBD Districts, where more than 70% of the lots on the same side of a block are already developed with buildings, and where the Zoning Officer determines that more than 70% of such buildings have a front yard setback of 30 feet or less along such side of the block, then if a new principal building is proposed, then at least a portion of the front building wall of a new principal building shall have a front yard building setback that is not more than five feet larger and not less than five feet smaller than the average front yard setback of the existing buildings that have a setback of less than 30 feet. The maximum front yard setback may be met with an attached front porch or a building wall. A maximum building setback shall not apply where the area between the building and the curb is occupied by an outdoor cafe or pedestrian plaza.

This Subsection (b) shall apply when Subsection (a) does not apply. In the OI, RHD and CBD Districts, any new principal building shall have a maximum front building setback along a street of 25 feet. This maximum building setback shall not apply in areas occupied by an outdoor cafe or pedestrian plaza. The intent is to have new parking to the side and rear of the building. This subsection shall not prevent the construction of an access driveway in the front. On a corner lot, this provision shall only apply to one of the two abutting public streets.

Where a subject lot has two abutting lots on the same side of the street along the same block, and both of these lots have an existing front yard building setback that is smaller than the setback that would be required on the subject lot, then the subject lot may have a minimum front yard setback that is equal to the average of those two abutting lots.

Articles 1303 and 1304 list where solar energy collection devices are allowed and the maximum percentage of lot area that can be covered.

See § 1305.02(e) which allows solar energy collection devices to exceed the maximum height. Solar screens, awnings, or solar panels that extend over building windows and that do not include any signage may intrude into a building setback area by up to 15 feet.

Solar energy collection devices that are not located on a building roof shall not: 1) be located in a minimum front yard and 2) have a total height above the ground of more than 15 feet, unless they meet minimum setbacks for a principal building.

When an applicant owns two or more adjacent lots and at least one of those lots is proposed to utilize solar energy collection devices, the applicant is requested to consider establishing a solar access easement or a similar legal mechanism to make sure that structures or vegetation on one lot does not unreasonably obstruct solar access for the solar energy collection devices on the adjacent lot.

Where solar energy collection devices are being placed on a building roof, it is requested that they be set back a minimum of three feet from the side and bottom edges of the roof to allow for safer access by and less risk of electrical shock to emergency responders.