Friday, September 16, 2016

Accessory Dwelling Units

We are very excited about the proposed policy changes currently under review by the City Council that would modify current development standards making it easier to construct Backyard Cottages and Accessory Dwelling Units here in Seattle. Even with the recent appeal from the Queen Anne Community Council, this new legislation is expected to pass by the end of the year. For those not familiar this housing typology, the following is a brief summary of most everything you need to know.


An Accessory Dwelling Unit (ADU) is a self-contained living unit located within a single family house and is often referred to as mother-in-law suite or granny flat. They are typically constructed within basements, attics and attached garages additions. And along with DADUs, they have a separate entrance and their own living space, a small kitchen, a bed and bathroom.

ADU in attic or basement

ADU addition

A Detached Accessory Dwelling Unit(DADU) is a separate living unit located on the same lot as a single family home and is often referred to as backyard cottage or carriage house. They are typically separate, free-standing structures or constructed within or on top of a detached garage.

DADU garage conversion and 2nd floor addition

FYI - in most cities throughout the country, other than Seattle, an ADU is defined as a 2nd separate living unit located within, attached to, or detached from a single family house. Seattle however, has decided to make the distinction between an attached (ADU) and a detached (DADU) accessory dwelling unit - so if you're doing research, keep this in mind.

Happy Investing!

Today's blog courtesy of David Taber, Neiman Taber Architects

No comments: