Lakewood ADU Requirements and Zoning Laws — Washington

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ADU Regulations in Lakewood, Washington

Updated September 29, 2026

In Pierce County south of Tacoma, Lakewood follows Washington's HB 1337 statewide ADU rules. The city's location near Joint Base Lewis-McChord creates strong rental demand for accessory units.

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

Regulation	Requirement
Maximum Size	1,000 sq ft
Property Setbacks	5 ft rear, 5 ft side
Extra Parking Required	Not required (near transit)
Owner Occupancy	Not required

Additional Local Requirements for Lakewood

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

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Frequently Asked Questions About ADUs in Lakewood

Can I build an ADU in Lakewood?

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 Lakewood?

ADUs in Lakewood 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 Lakewood planning department before designing your project.

What are the setback requirements for an ADU in Lakewood?

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

Disclaimer: This guide summarises publicly available city zoning rules and is for general information only — it is not legal or architectural advice. Codes change; always confirm current requirements with the Lakewood planning department before you design or build.

Lakewood ADU Zoning Rules & Permit Guide