Sue
I’m sorry to hear that you’re dealing with this. As a fellow renter who got thrown out of a place that was going condo a few years back, I sympathize about unplanned moves.
There is a real estate attorney in my department (I work at a downtown law firm, but am not personally a lawyer) that I could check with, but as a partner I believe he charges about $400/hr.
The RCW doesn’t seem to have much in it about the situation: http://apps.leg.wa.gov/RCW/default.aspx?cite=61.24.143 which essentially says get a lawyer to see if you have any rights.
This actually has some helpful info (from WashingtonLawHelp.org), but I don’t know if any laws have been created that supercede this: http://tinyurl.com/26us9kt although I don’t think so. Most important takeaway from this is that federal law says you have to have 90 days notice, despite what scare tactics they may use to get you out sooner.