Burien ADU Zoning Rules & Permit Guide

ADU Regulations in Burien, Washington

Updated September 29, 2026

Just south of Seattle in King County, Burien permits ADUs under Washington's HB 1337. The city's transit-oriented zones near Sound Transit provide parking exemptions for accessory units.

Below is a summary of the key zoning rules applicable to Accessory Dwelling Units in Burien as of 2026. Regulations are governed by Washington's HB 1337 (2023) which limits local ADU restrictions statewide.

Additional Local Requirements for Burien

• ADU by right in residential zones
• Minimum 200 sq ft
• WA HB 1337 limits local restrictions

Frequently Asked Questions About ADUs in Burien

Can I build an ADU in Burien?

This Washington city follows HB 1337 which limits local ADU restrictions. Parking may be waived near transit.

What is the maximum ADU size allowed in Burien?

ADUs in Burien can be up to 1,000 square feet, subject to the property's zoning and lot coverage limits. Always confirm the exact allowed size with the Burien planning department before designing your project.

What are the setback requirements for an ADU in Burien?

ADUs in Burien generally require setbacks of 5 ft rear, 5 ft side. Washington's HB 1337 (2023) limits how restrictive local ADU rules can be, but the exact setback figures come from Burien's own land use code — confirm them with the city before you design.