Now you know why your property tax assessment is so high, but did you know what it takes to qualify for a senior tax exemption? Here it is right off the King County website:
RCW 84.36.381 "grants property tax exemptions if your total annual income is $30,000 or less and if you are 61 years of age or older, or you are retired because of physical disability, or if you are a widow or widower at least 57 years of age whose spouse had an exemption at the time of his or her death."
That pretty well narrows it down! Not many of us are going to qualify for senior exemption, but if you do, it is well worth the effort to apply. Just go to: http://www.kingcounty.gov/property.aspx
If you want to dispute your assessment, you may be running out of time, as you have a limited time to appeal. Check out the above website and go to "disputes."
I hope this helps.