Every county runs the same free decline-in-value review, but each has its own form, deadline, and way to file. We do the analysis and prepare everything; then we either submit it for you or hand you a copy-ready page to finish in about two minutes. Here's the requirement for each, and exactly what we handle.
The county asks for its 2026-2027 Prop 8 (Decline in Value) Request Form with your opinion of value and up to three comparable sales that closed on or before March 31, 2026.
We do the analysis. We pull your parcel, run the comparable-sales review, and hand you a copy-ready page (and an email) with your opinion of value and the three strongest comps.
You finish on the county's quick portal. Santa Clara takes this request through its own online portal. You sign in with your APN and the PIN from your mailed Notification of Assessed Value, complete a short verification, paste in the values we gave you, and submit. About two minutes.
The county asks for its Request for Value Review (Proposition 8) form with comparable sales supporting your opinion of value.
We handle it by filling the form, collecting your e-signature, and submitting it to the Assessor.
The county asks for its Informal Request for Decline in Market Value Reassessment with comparable sales.
We handle it by filling the form, collecting your e-signature, and submitting it to the Assessor.
The county asks for its Decline in Value Reassessment Application with comparable sales.
We handle it by filling the form, collecting your e-signature, and submitting it to the Assessor.
The county asks for its Informal Assessment Review Request with your opinion of value and comparable sales that closed near January 1, 2026.
We handle it by filling the form, collecting your one e-signature, and submitting it to the Office of the Assessor-Recorder. You do nothing else.
Timing. San Francisco's informal review runs January 2 through March 31 each year. The 2026 window has closed and reopens January 2, 2027. A formal appeal with the Assessment Appeals Board is still open through September 15 as a backstop.
Deadlines and forms come from each county assessor's published materials for the 2026-27 tax year. Links go to the county's own site so you can verify. More counties are on the way; request yours here.