Snohomish County requires fences six feet or less to sit within any required landscaped-area width, or without a setback where none is required; taller site-obscuring fences must meet the building setback. All corner-lot fences must keep the 15-foot sight-clearance triangle clear above 42 inches.
Under SCC 30.28.040, fences and freestanding walls six feet or less shall be set back the width of any required landscaped area, or where none is required may sit in any front, side, or rear yard without a setback. Site-obscuring fences over six feet must meet the required building setback or the width of any required or approved landscaped area. An open wire-mesh or similar fence may exceed the height limits on the periphery of school and park playgrounds, public facilities, industrial and commercial uses, and government installations where security is required. All corner-lot fences must satisfy the vision-clearance rule of SCC 30.23.100.
Fences that violate setback, sight-triangle, or height standards are subject to PDS code enforcement, which can require correction or removal.
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