Accessory Dwelling Units are encouraged within the City of Leavenworth, especially for local workforce housing and extended/elderly housing. An accessory dwelling unit (ADU) is a second dwelling on the same parcel of land as a single-family dwelling. ADUs can be within, attached or detached from a single-family dwelling. All ADUs require a building permit.
To encourage ADUs, the City has partnered with Syndicate Smith to develop these pre-approved ADU construction plans. Each of the plans is designed to be less than 900 square feet (SF) which permits the use of the existing water/sewer connections, when possible. Larger ADU development, up to 1200 SF is permitted but there are not pre-approved construction plans available.
These designs are part of the City of Leavenworth’s pre-approved Plans for Accessory Dwelling Units. If you are interested in licensing a plan, please visit the City’s ADU webpage first to read through the information and understand the requirements.
455 SF, One Bedroom
665 SF, Two Bedroom
665 SF, One Bedroom ADA
891 SF, Two Bedroom, Two Story, Single Car Garage