In buying a home, property taxes are certainly something to consider because they do add to the overly monthly P.I.T.I. One nice thing is that property taxes are a great write-off come April 15th.
There is no overall blanket statement that can be said that taxes are higher in one county over another because of the variables involved, the cities in each county, etc. If you're looking to purchase in the Tri-County areas then taxes will be all over the map for various reasons.
Unfortunately there's not one general statement that can answer your question "Are they very different" other then . . . it all depends.
Carla Muss-Jacobs, Principal Broker/Owner
EBA Portland, LLC
Exclusive Buyer Agency since 1999
Tom Inglesby, Borker