Sammamish, WA Building Setbacks & Zoning: Structure Height Limits (2026)

080, which applies uniformly across the Lake Sammamish shoreline residential, Lake Sammamish urban conservancy, and Pine and Beaver Lakes shoreline residential and urban conservancy designations. Single-family residences are capped at 35 feet in height in every one of those designations, and any "other structure" located outside the shoreline setback is likewise capped at 35 feet with no footprint maximum. 080. 080(2)(e) allows a new accessory structure, other than an ADU, to be located waterward of the shoreline setback only if its total footprint does not exceed 200 square feet, its maximum height is not more than 10 feet above existing average grade level, and it sits outside wetlands, streams, and other ecologically sensitive buffers.

These figures apply only within shoreline jurisdiction; the reviewed file does not contain the city's general, non-shoreline zoning height schedule that would apply to a typical inland Sammamish lot, which sits in Title 21A SMC.