Land Use & Zoning

A Washington property is zoned for residential use. The owner wants to add an Accessory Dwelling Unit (ADU). Under a 2023 Washington State law (SB 5235), cities and counties:

AMay prohibit ADUs in all single-family zones
BMust allow ADUs in all areas zoned for single-family residential✓ Correct
CMay require owner-occupancy as a condition of ADU approval
DMay limit ADU size to 400 square feet

Explanation

Washington's 2023 ADU legislation (SB 5235/RCW 36.70A) requires cities and counties to allow ADUs in all areas zoned for single-family residential development and prohibits many restrictive conditions that previously limited ADU construction.

Related Washington Land Use & Zoning Questions

Practice More Washington Real Estate Questions

1,500+ questions covering all exam topics. Start free — no signup required.

Take the Free Washington Quiz →