Town Center | Development Standards—Design Requirements
d) The incorporation of landscaping into biofiltration swale designs is encouraged if the biofiltration swale is located and/or designed as a positive landscaping feature with approved design and plant materials. Where appropriate, shade tolerant plants should be used. e) The sloped edges of unfenced bioswales shall be no greater than two and one-half percent. Where slopes are greater than two and one-half percent, the swale shall be fenced or vegetated to avoid safety hazards.
If the director determines that subsection 1.a. or b. of this section is not feasible, and if the site is not on a pedestrian-oriented street, provide for one of the following options: iii. Install substantial landscaping: At least 30 feet by 30 feet or 900 square feet of ground surface area with trees, shrubs, and groundcover in a decorative manner that provides four-season interest. The space shall include a special architectural element, such as a trellis, to add identity or demarcation of the area. Such an architectural element may have a sign incorporated into it (as long as such sign does not identify an individual business or businesses); or iv. Other treatments will be considered, provided they meet the intent of the standards and guidelines as determined by the director.
11. Site planning – Street corners
a. Street Corner Treatments. All development proposals located at street corner sites in the TC-A-1, A-2, and A-3 zones shall include at least one of the design treatments described below (in order of preference, subsection 1.a. of this section being the highest): i. Locate a building on the street corner (preferably with a corner entry); or ii. Provide pedestrian-oriented space at the corner leading directly to a building entry or entries.
Note: Ensure that “sight triangles” are maintained for visibility from vehicles. See SDC 21.07.050T.
B. Article II. Site Design Elements
1. Site design elements – Pedestrian amenities
a. Durable Pedestrian Furniture. Pedestrian furniture provided in public spaces shall be made of durable, vandal- and weather-resistant materials that do not
472 | Title 21: Sammamish Development Code
Effective | January 1, 2022
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