Many parts of Seattle are now allowing backyard cottages in residentially zoned neighborhoods. Though the practice is not legal throughout the Puget Sound area, a host of other cities allow it. Backyard cottages allow people to live where they work and play, and have smaller carbon footprints then typical homes. Additionally, structures built on already-developed land increase urban density and generate tax income, making them appealing for many cities.
www.smartgrowth.org/news/article.asp?art=7811
Article courtesy of The Smart Growth Network