Sammamish, WA Fence Regulations: Material Restrictions (2026)

Sammamish restricts dangerous fence materials in residential areas through its fence design standards. Under the code provisions for fences (referenced in the City's development code at SMC 21.06.020, with the fence definition and standards in SMC 21.06.010.E), barbed-wire and razor-wire fences are not allowed in the R-4 through R-18 zones except as specifically required for necessary security related to a non-residential use. Electric fences are limited as well: an electric fence sold as a complete and assembled unit may be installed by an owner only if the controlling elements of the installation are certified by an A.N.S.I.-approved testing agency. The general fence definition in Handout No. 220 lists acceptable materials such as stone, brick, concrete block, wood, metal, mesh, rails, and composites, while excluding hedges and vegetation. These are city-specific rules; they reflect Sammamish's choice to keep hazardous and aggressive fencing out of residential neighborhoods. Owners with agricultural, utility, or other non-residential security needs should confirm with the Permit Center whether their situation qualifies for an exception before installing barbed wire or an electric fence.