23.60A.506

A. Maximum height. The maximum height in the UM Environment is 35 feet, except as modified in subsections 23.60A.506.B through 23.60A.506.D. B. Height exceptions for water-dependent uses. The following height exceptions apply to water-dependent uses in the UM Environment: 1. Cranes, mobile conveyers, light standards, and similar equipment necessary for the function of water-dependent uses or the servicing of vessels may extend above the maximum height limit; and 2. Other structures required for uses that are accessory to a water-dependent or water-related use, including but not limited to accessory office, accessory warehouse, and accessory manufacturing facilities may be authorized up to 55 feet in the Ballard/Interbay Northend Manufacturing and Industrial Center by the Director if: a. The accessory structure requires additional height because of its intended use; or b. Granting additional height for the accessory structure would result in a significant amount of additional usable area for the principal water-dependent use, water-related use, and/or additional area for ecological restoration and enhancement; and c. No more than 20 percent of the lot area is covered by portions of the structure that exceed the maximum height limit established in subsection 23.60A.506.B; d. Eighty percent of the lot is preserved by covenant for water-dependent and/or water-related uses if uses that are not water-dependent or water-related occupy the structure; e. The views of the shorelines from a substantial number of residences on areas within and adjoining the Shoreline District would not be obstructed by the increased height; and f. Permits issued pursuant to this subsection 23.60A.506.B shall identify the specific uses and gross floor areas of each use on the site. C. Rooftop features 1. Radio and television receiving antennas, flagpoles, smokestacks, chimneys and religious symbols for religious institutions are exempt from height controls of this Chapter 23.60A , provided: a. The feature is no closer to any adjoining lot line than 50 percent of its height above existing grade; or b. If attached to the roof, the feature is no closer to any adjoining lot line than 50 percent of its height above the roof portion where attached; and c. The width of the feature does not obstruct the view of the shoreline from a substantial number of residences on areas within or adjoining the Shoreline District. 2. Clerestories, communication and accessory communication devices, firewalls, green roofs, greenhouses, monitors, open railings, parapets, planters, skylights and solar collectors may extend up to 4 feet above the maximum height limit where allowed in the underlying zone, except where the width of such features obstructs the view of the shoreline from a substantial number of residences within or adjoining the Shoreline District, in which case the Director may require a lower height. 3. Stair and elevator penthouses and mechanical equipment may extend 10 feet above the maximum height if: a. The combined total coverage of all features does not exceed 20 percent of the roof area, or 25 percent of the roof area if the total includes screened mechanical equipment; b. Allowed in the underlying zone or special district; and c. The width of such features does not obstruct the view of the shoreline from a substantial number of residences on areas within or adjoining the Shoreline District, in which case the Director may require a lower height. 4. Structures may extend 18 inches above the maximum height limit if the roof insulation exceeds the energy code requirements in effect when the structure is constructed. D. Bridges. Bridges may exceed the maximum height limit. (Ord. 124750 , § 54, 2015; Ord. 124105 , § 3, 2013.)