Kent ADU Zoning Rules & Permit Guide

ADU Regulations in Kent, Washington

Updated September 29, 2026

Located in King County south of Seattle, Kent's ADU regulations follow Washington's HB 1337 which limits local restrictions. The city's transit-oriented zones near Sound Transit stations qualify for parking exemptions.

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

Additional Local Requirements for Kent

• ADU by right in all residential zones
• Minimum 200 sq ft
• WA HB 1337 prohibits excessive restrictions
• No short-term rental use allowed

Frequently Asked Questions About ADUs in Kent

Can I build an ADU in Kent?

Kent follows Washington state law (HB 1337). Parking is waived within proximity to transit stops.

What is the maximum ADU size allowed in Kent?

ADUs in Kent 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 Kent planning department before designing your project.

What are the setback requirements for an ADU in Kent?

ADUs in Kent 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 Kent's own land use code — confirm them with the city before you design.