Lake Oswego defines Secondary Dwelling Unit (also known as Accessory Dwelling Units) as one additional dwelling unit located on a lot already containing a primary dwelling. An SDU may be in a detached structure or may be located within or attached to the primary dwelling.
This guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.
1 attached or detached ADU per residential property
Design requirements on window type and location, may require privacy fencing, no entrance within 10 feet of property line.
SDC Fees-around $20,0000
Size-800 SF
At Dweller, we are responsible for all of these tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.
Click here to learn more about the Lake Oswego permits for Accessory Dwelling Units (ADUs).