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

Shoreline's residential setback minimums come from the 'Min. Front Yard Setback,' 'Min. Setback to Garage or Carport Entry,' 'Min. Rear Yard Setback' and 'Min. Side Yard Setback' rows of Table 20.50.020(1) in SMC § 20.50.020, which applies to the NR3, NR2, NR1 and TC-4 zones. Every one of those four zones carries the same 10-foot minimum front yard setback. Garages and carports face a stricter standard: a 20-foot setback from the front lot line, reduced to 10 feet where the garage or carport entry abuts an alley, again identical across all four zones, a rule meant to keep enough driveway apron for a parked car without blocking the sidewalk.

Rear and side setbacks scale down by zone density: NR3 and NR2 both require a 10-foot rear setback, while NR1 and TC-4 drop to 5 feet; all four zones share a 5-foot minimum side yard setback. Numbered footnotes attached to these rows allow site-specific flexibility: footnote (2) permits reduced internal setbacks for unit-lot, zero-lot-line and mixed single-family attached developments as long as the overall site still meets the table's setback totals; footnote (23) lets a retained or converted middle-housing structure keep its existing legally nonconforming setbacks; and footnote (25) lets a detached accessory dwelling unit's side or rear setback drop to zero feet if it abuts an alley.

Planning and Community Development checks setback compliance at building-permit review, and a structure built inside these minimums without an applicable exception is a Code Violation enforceable through the notice-and-order procedure of SMC § 20.30.760.