This seems like it should be easy but it's not, you actually have to file a formal appeal with the county tax assessor's office, if the difference is completely obvious, they will have the appraiser sent out to re-evaluate your taxes.
The problem ~ The taxed assessed values are not actually determined Year to Year, but rather increase according to a predetermined schedule. Go to the county office and tell them you would like to contest the taxable amount of your home, they should be able to point you in the right direction.
Jason H. Gomes
Prudential NW Properties
cell: 503.608.8785
DesK: 503.350.7378 - Fri Jun 5 2009, 11:33