Dan
There are a lot of WAC's that address these tax exemptions so you will have to look through them all to get the exact details! I called our local Auditors Office and they transferred me to the Appraisers Office. The girl didn't know exactly which WAC relates to this exemption, so she gave me several for you to check out. She did say that you had to 61 or older, a full time resident of Washington and your joint income must be $30,000 or less. She said that you are allowed to deduct your residence, and up to one acre of land with this exemption!

These are the WAC's to check out and see if you qualify;

WAC- Title 458-16; 458-16A; and 458-19

Hope this helps you find what you are looking for.

Cowlitzfisherman