WA SB5770

Creates a primary residence property tax exemption from the state levy equal to the greater of $100,000 assessed valuation or 60% of the county median residential assessed value, effective for taxes collected in 2028 and thereafter.

Exemption applies only to the state property tax levy, not local taxing district levies, and requires the residence to be occupied as a principal place of residence for at least 184 days per calendar year.

Claimants must file an application with the Department of Revenue by April 1st of the year prior to receiving the exemption, including social security numbers; the exemption continues until the property is sold, transferred, or no longer qualifies.

Establishes a primary residence property tax exemption administration account to distribute $5.00 per application to counties annually ($10.00 per estimated exemption for 2026-2027) to cover administrative costs.

Contingent effective date of January 1, 2026, requires voter approval of a constitutional amendment (Senate Joint Resolution 8203) at the next general election; if not ratified, the act is void.