Re-posting info from the original post summary (for the benefit of those reading this outside of the forum to which it was posted):
Seattle Architecture Foundation is offering three architecture walking tours on June 28, August 30 and October 25.
Description and details: Once a neighborhood in decay, Columbia City has become a Seattle hotspot, with a lively business district, lovely homes and a new Light Rail station. The two-hour walking tour begins at 10:00am outside the entrance to the Columbia City Library at 4721 Rainier Ave S.
Register in advance for $15 at seattlearchitecture.org or call 206.667.9184 with your V/MC. Day-of-tour walk-ups may register for $17, if space is available