21A.48.050: DESIGN STANDARDS AND GUIDELINES:
Landscape plans shall be prepared based on the following design standards and guidelines. The standards and guidelines apply to all new development and redevelopment of a residential, commercial, institutional, or manufacturing use and all associated landscaped areas as identified by this chapter. The standards and guidelines also apply when a landscaping plan is required to be submitted by this chapter. Design standards are numerically measurable design requirements that can be definitively evaluated for compliance. Design guidelines are not precisely measurable, but compliance can be determined through the evaluation process of landscape plan review. The evaluation and approval of landscape plans shall be based on compliance with both the design standards and guidelines.
   A.   Design Standards At Time Of Planting:
      1.   Deciduous Trees: All deciduous trees shall have a minimum trunk size of two inches (2") in caliper, unless otherwise specified.
      2.   Evergreen Trees: All evergreen trees shall have a minimum size of five feet (5') in height, unless otherwise specified.
      3.   Ornamental Trees: All ornamental trees shall have a minimum trunk size of one and one-half inches (1-1/2") in caliper, unless otherwise specified.
      4.   Shrubs: All shrubs shall have a minimum height or spread of eighteen inches (18") depending on the plant's natural growth habit, unless otherwise specified. Plants in five (5) gallon containers will generally comply with this standard.
      5.   Drought Tolerant Species: Site conditions in Salt Lake City are generally arid, and the selection of plant species suited to dry conditions is appropriate. To promote water conservation, not less than eighty percent (80%) of the trees and eighty percent (80%) of the shrubs used on a site shall be drought tolerant species that can withstand dry conditions once established. The city has compiled a list titled "Water Conserving Plants For Salt Lake City", that may be locally available.
      6.   Street Trees: Trees located within the public right of way are subject to the following provisions:
         a.   The pruning or removal of trees is prohibited without the approval of the urban forester or designee.
         b.   Cutting, Removal, Or Damage Prohibited: Trees shall not be cut, removed, pushed over, killed, or otherwise damaged without the approval of the urban forester or designee.
         c.   The root zone of all street trees shall be protected when impacted by any construction work on the abutting property or any work within the right of way when a street tree is present. Root zone protection is subject to approval from the urban forester or designee.
         d.   All street trees shall be provided with an irrigation system that has the capability of providing adequate and efficient water to each street tree as determined by the urban forester or designee.
      7.   Limitations on Turf:
         a.   For single family and two-family uses turf shall not exceed thirty five percent (35%), of the area to be covered with vegetation. For yards and areas required to include vegetation where the thirty five percent (35%) calculation would result in a number less than two hundred fifty (250) square feet, the property may have a maximum of two hundred fifty (250) square feet of turf. Active recreation areas are exempt from this provision.
         b.   For multi-family uses turf shall not exceed twenty percent (20%) of the area to be covered with vegetation. Active recreation areas are exempt from this provision.
         c.   For commercial, industrial, and institutional uses, turf shall not exceed twenty percent (20%) of the area to be covered with vegetation. Active recreation areas are exempt from this provision.
         d.   Areas planted with turf shall not be less than eight feet wide at the narrowest point. This applies to any required yard, landscaped yard, landscape buffer, park strip, and parking lot landscaping.
         e.   Turf shall not be installed on any slope greater than twenty five percent (25%) or where the rise of the slope is more than one vertical foot for every four horizontal feet.
      8.   Mulch: At least three to four inches (3"-4") of mulch, permeable to air and water, shall be used in planting beds and in landscaped areas that are not covered with vegetation or other allowed inorganic surfaces to control weeds and improve the appearance of the landscaping. Fiber barriers and plastic sheeting that are not porous to air and water are prohibited.
      9.   Automatic Irrigation Controller Required. Irrigation systems are required to use an irrigation controller that includes a Watersense label that can automatically adjust the frequency and/or duration of irrigation in response to changing weather conditions and be equipped with an automatic rain delay or rain shut-off capabilities.
   B.   Design Guidelines:
      1.   Scale And Nature Of Landscaping Material: The scale and nature of landscaping materials shall be appropriate to the size of the structures. Large scale buildings, for example, should generally be complemented by larger scale plants.
      2.   Selection Of Plants: Plants shall be selected for form, texture, color, pattern of growth and adaptability to local conditions.
      3.   Evergreens: Evergreens should be incorporated into the landscape treatment of a site, particularly in those areas where screening and buffer is required.
      4.   Softening Of Walls And Fences: Plants shall be placed intermittently against long expanses of building walls, fences, and other barriers to create a softening effect.
      5.   Detention/Retention Basins And Ponds: Detention/retention basins and ponds shall be landscaped. Such landscaping may include shade and ornamental trees, evergreens, shrubbery, hedges, ground cover and/or other plant materials.
      6.   Irrigation Systems: All irrigation systems shall comply with the following requirements:
         a.   All irrigation shall be appropriate for the designated plant material and achieves the highest water efficiency.
         b.   Drip irrigation or bubblers shall be used except in turf areas. Drip irrigation systems shall be equipped with a pressure regulator, filter, flush-end assembly, and any other appropriate components.
         c.   Each irrigation valve shall irrigate landscaping with similar site, slope and soil conditions, and plant materials with similar watering needs. Turf and planting beds shall be irrigated on separate irrigation valves. In addition, drip emitters and sprinklers shall be placed on separate irrigation valves.
      7.   Energy Conservation: Plant placement shall be designed to reduce the energy consumption needs of the development.
         a.   Deciduous trees should be placed on the south and west sides of buildings to provide shade from the summer sun.
         b.   Evergreens and other plant materials should be concentrated on the north side of buildings to dissipate the effect of winter winds.
      8.   Berming: Earthen berms and existing topographic features should be, whenever determined practical by the zoning administrator, incorporated into the landscape treatment of a site, particularly when combined with plant material to facilitate screening. (Ord. 14-23, 2023: Ord. 45-07 § 2, 2007: Ord. 88-95 § 1 (Exh. A), 1995: Ord. 26-95 § 2(24-5), 1995)