Development Standards—Landscaping and Irrigation | Town Center
B. Application
vi. Groundcover pursuant to SDC 21.07.070G.;
Except for communication facilities regulated pursuant to SDC 21.06.060, all new development shall be subject to the landscaping provisions of this chapter.
vii. Applicants shall demonstrate to the director’s satisfaction that the selected plant materials and configuration will be able to completely screen 80 percent of the unwanted views within three years of planting and fully screen the unwanted view within six years. This requirement will account for the size of materials planted and their typical growth rate; and viii. No plants included in the King County noxious weed list.
C. Landscaping
The seven types of landscaping screens and stormwater treatment are described and applied as follows:
1. Type I Landscaping Screen.
a. Type I landscaping shall function as a full screen and visual barrier. This landscaping is typically found between residential and nonresidential areas and to screen unwanted views;
b. Type I landscaping shall minimally consist of:
i. A mix of primarily evergreen trees, shrubs, perennials, and groundcover generally interspersed throughout the landscape strip and spaced to form a continuous screen; ii. Between 70 and 90 percent evergreen trees (use of Leyland Cedars is discouraged); iii. Trees provided at the rate of one per 100 square feet or one per 10 linear feet, whichever is greater, of landscape strip; iv. Evergreen shrubs or perennials provided at the rate of one per 20 square feet of landscape strip;
2. Type II Landscaping Screen.
a. Type II landscaping is a “filtered screen” that functions as a visual separator. This landscaping is typically found between differing types of residential development, and to screen unwanted views from the pedestrian environment;
b. Type II landscaping shall minimally consist of:
i. A mix of evergreen and deciduous trees, shrubs, perennials, and groundcover generally interspersed
v. Perennials;
Effective | January 1, 2022
Title 21: Sammamish Development Code | 509
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