From the ecobuilding.org website:

Join us for the 2nd Annual Green Tour in Olympia, WA!

Come learn about the latest money-saving, eco-friendly ways to build, landscape, and design your community! Builders, architects, designers, craftsman with a deep green focus will showcase their sustainable design and construction projects on this free, public tour.

Plan your participation in the 2011 South Sound Green Tour
April 16 & 17, 2001 – Open 10 am – 4pm Daily

ALL-NEW 20 Inspiring Sites: Residential, Commercial and More
Real-Life Workshops, Going All Weekend
Green Tour EcoExpo – Register to Exhibit
Opening Ceremony at 10am, Saturday April 16.

Read more on Green Tour Sites