Issaquah, WA Fence Regulations: Fence Permit Requirements (2026)

Section 105.2 of the Construction Administrative Code opens with a warning: exemptions from permit requirements are not authorization for any work done in violation of the code, the construction codes or any other law or ordinance of the City. Item 2 of the building list then states that permits are not required for fences not over 7 feet (1,829 mm) high, where they are located in accordance with all land use regulations and street standards. A fence taller than 7 feet falls outside the exemption and returns to the general rule in section 105.1 that construction of a structure requires an application to the Building Official.

The exemption has a geographic limit. Permit exemptions do not apply to areas of flood hazard or City land use critical areas as defined in the IMC Land Use Code unless the work is entirely within or on the exterior envelope of a legally established existing building. A yard fence is not inside a building envelope, so those mapped areas need a permit regardless of height.

The land use side is separate. In the Single-Family - Duplex zone, LUC 18.700.160(B)(2) allows a low fence no taller than four feet in the front yard, requires the prominent entry of the dwelling to remain visible from the street, and permits privacy fences in front of or near recessed portions of the street-facing facade as long as the entire front entry feature is not blocked. LUC 18.600.090 applies to commercial and multifamily developments and caps site walls adjacent to pedestrian areas at four feet unless terraced.

Retaining walls have their own line in section 105.2: walls not over 4 feet in height, measured from the top of the wall to the finish grade, are exempt unless supporting a surcharge.