Auburn, WA Building Setbacks & Zoning: Setback Rules (2026)

Auburn zoning districts are organized under ACC Title 18, which sets distinct setback standards for each residential (R-1 through R-20), multifamily, and mixed-use classification. In typical R-5, R-7, and R-10 single-family zones, the front yard setback is 20 feet, side yards are 5 feet each, and rear yards are 20 feet from the property line. Corner lots must meet front-yard standards on both street frontages, though the secondary street sometimes has a reduced setback of 10 feet. Higher-density R-16 and R-20 multifamily zones and downtown DUC zones have different setbacks tied to building height and adjacent uses. Allowed encroachments include eaves up to 24 inches, chimneys of limited width, and uncovered porches that meet specific size caps. Accessory structures under 200 square feet may have reduced rear setbacks in some zones. Fences, arbors, and rockeries generally can be placed at the property line subject to height limits. New construction near the Green River, White River, Mill Creek, or designated critical areas must observe larger buffers under ACC Title 16 critical areas ordinance, which can exceed standard setbacks. Applicants for variances to setback standards follow a quasi-judicial hearing process through the hearing examiner. Confirm zone-specific setbacks with Auburn Community Development at (253) 931-3090 before submitting permit drawings.