New backyard cottage laws approved by Seattle City Council - Curbed Seattle
https://seattle.curbed.com/2019/7/1/20677616/backyard-cottage-mother-in-law-apartment-zoningSeattle Says Yes to the Best Rules in America for Backyard Cottages
https://www.sightline.org/2019/07/01/seattle-approves-best-backyard-cottages-rules-united-states/