Serving San Diego, Greater LA, SF Bay, & Seattle
Watch our free ADU webinar
All ADU Regulations

Kenmore, Washington

Kenmore is a perfect place to build an ADU. Here are Kenmore's up-to-date ADU rules.
Updated Jul 21, 2023


Kenmore is a charming city nestled in the northernmost short of Lake Washington, 12 miles northeast of downtown Seattle. The suburban commuter town is famously known for the Kenmore Air Harbor, one of the largest seaplane-only passenger facility of its kind in the United States. The community is in proximity to the great outdoors with easy access to the city, offering a unique blend of recreational activities, amenities, and scenery across the town.


Accessory Dwelling Unit (ADU) projects must meet all of Kenmore’s Zoning Code requirements, specifically Chapter 18.73.100. A property's zone is available on Kenmore Zoning Map or within the City's document center.

Number of units

Only one accessory dwelling unit, either attached or detached, is allowed.

Building size

For an attached ADU, the maximum size of an attached ADU is 1,000 square feet.
For a detached ADU, the size of a detached ADU depends on the lot size. For lots greater than 6,000 square feet, the maximum floor area of a detached ADU is 10% of the lot area, up to a maximum of 1,500 square feet. For lots less than 6,000 square feet, the maximum size is 600 square feet.


In R-4 and R-6 residential zones, an ADU is permitted in a rear setback, provided that the ADU is no closer than ten feet to the rear lot line.


No additional off-street parking spaces are required for an ADU.


An owner of the property must occupy either the primary residence or the Accessory Dwelling Unit for six consecutive months after the ADU has been built.
Cottage is here to help you navigate the ADU process. Reach out to us and we’ll help you build a custom ADU to fit your unique property characteristics and local regulations!

Want to learn more about ADU regulations in your area?

Book a free consultation and estimate with a Cottage ADU Expert to find out what’s possible on your property!