HI Steven,
I do not live in Seattle but I would recommend that you start with a directory such as
http://www.repair-home.com/Directory/Washington/Bellevue. I would call at least three different vendors for price quotes. Verify that they are licensed, in good standing (this can usually be checked through your state's licensing authority:
https://fortress.wa.gov/lni/bbip/ ), and request that they provide proof of insurance (you could be liable if something happens to them while their on your property) and references.
That's the best way to not be taken to the cleaners
