Planning 2016-11-10 Item 4 - TMC Chapter 18.52 Landscaping Code Update: Attachment B - Current TMC 18.52

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18.52.035 Interior Parking Lot Landscaping Requirements Landscaping within parking areas shall be provided as shown below. 1. Requirements for each distinctly separate parking area within the LDR zone for uses other than dwelling units, and in the MDR and HDR zones: a. For areas with up to 20 parking stalls per parking area, no interior landscaping is required. b. For areas with 21 - 40 parking stalls per parking area, 7 square feet of interior landscape area is required for each parking stall. c. For areas with more than 40 parking stalls per parking area, 12 square feet of interior landscape area is required for each parking stall (see Multi - Family Design Guidelines, Site Planning Section, No. 31, for the normal 15 square feet to be provided). d. All parking areas shall have a perimeter landscape strip a minimum of 2 feet wide with an average width of 5 feet. 2. Requirements for parking lots within the 0, MUO, RCC, and NCC zones: a. For lots with up to 20 parking stalls, no interior landscaping is required. b. For lots with 21 - 40 parking stalls, a minimum of 10 square feet of interior landscape area is required for each parking stall over 20. c. For lots with more than 40 parking stalls, a minimum of 200 square feet of interior landscape area plus 15 square feet for each parking stall over 40 is required. For areas placed behind buildings or otherwise screened from streets, parks and City trails the interior landscape requirement is reduced to a minimum of 200 square feet plus 10 square feet for each parking stall over 40. 3. Requirements for parking lots within the RC, RCM, C /Ll, TSO and TVS zones: a. For areas adjacent to public or private streets, a minimum of 15 square feet of landscaping is required for each parking stall. b. For areas placed behind buildings or otherwise screened from streets, parks and City trails a minimum of 10 square feet of interior landscape area is required for each parking stall. 4. Planting Standards: a. Interior landscape islands shall be distributed to break up expanses of paving. Landscaped areas shall be placed at the ends of each interior row in the parking area, with no stall more than 10 stalls or 100 feet from a landscape area. b. The minimum size for interior parking lot planting islands is 100 square feet. c. Planting islands shall be a minimum of 6 feet in any direction and generally the length of the adjacent parking space. TITLE 18 —ZONING d. Raised curbs or curb stops shall be used around the landscape islands to prevent plant material from being struck by automobiles. e. A minimum of 1 evergreen or deciduous tree is required per landscape island, with the remaining area to contain a combination of shrubs, living groundcover and mulch. (Ord. 2442 §2,2014, Ord. 2251 §63,2009, Ord. 2235 §14,2009, Ord. 1872 §14 (part), 1999) 18.52.040 General Landscape and Screening Requirements A. Appropriate plant materials. New plant materials shall include native species or non - native species that have adapted to the climatic conditions of the Puget Sound Region and are suited to the planting site, taking into account final plant size, stresses such as heat or freezing, space for planting, overhead lines or underground utilities present, and shade or sun exposure. Drought resistant species are encouraged, except where site conditions within the required landscape areas assure adequate moisture for growth. Grass may be used as a groundcover where existing or amended soil conditions assure adequate moisture for growth. Landscape perimeter trees should be selected for compatibility with existing plant material or street trees. B. Site preparation. Site preparation and planting of vegetation shall be in accordance with best management prac- tices for ensuring the vegetation's long -term health and survival and shall include incorporation and tilling in of organic material to a depth of 18 inches and mulching. C. Coverage standards. All landscaped areas in the MDR and HDR zones (including shrub beds) shall achieve 90% live ground coverage in three years, and all areas not occupied by a building (including surface parking areas) shall achieve 40% horizontal tree coverage in ten years. D. Visibility. The landscaping shall not obstruct view from or into the driveway, sidewalk or street. Landscape design shall allow for surveillance from streets and buildings and avoid creating areas that might harbor criminal activity. No shrubs shall be planted or allowed to grow over two feet in height within thirty feet of intersecting curblines or pavement edges (see TMC 11.20.090). No tree may be planted within two feet of a sidewalk or pavement edge. E. Outside storage areas. Outdoor storage shall be screened from abutting public and private streets and from adjacent properties. Such screens shall be a minimum of eight feet high and not less than 60% of the height of the material stored. Said screens shall be specified on the plot plan and approved by the Community Development Director. Except in the MDR and HDR zones, where outdoor storage shall be fully screened from all public roadways and adjacent parcels with a sight obscuring structure equal in height to the stored objects and with a solid screen of exterior landscaping. Produced by the City of Tukwila, City Clerk's Office Page 18—T