Zillow.com offers useful real estate info
How do I … get an accurate estimate of my house’s worth?
You could start by visiting your county assessor’s page and entering your parcel address, then use that as the assessed value. But what you’re more interested in is the market value of a house.
We strongly recommend Seattle-based Zillow.com as the next stop. That site’s Zestimate service does a very good job of establishing a market value, based on comparable properties in one’s neighborhood.
Check out the Zillow forums if you want to see what people are saying on Zillow (plug in “Spokane” as the search term).