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Riverside County · CaliforniaAppeal Your Riverside County Property Tax.
The Riverside County Assessor's office in Riverside values every property on California's January 1 lien date. When that assessed value overshoots the market, you have two tools: an informal Prop 8 decline in value review with the assessor, or a formal Assessment Appeals Board filing with the Clerk of the Board.
Riverside County Assessor
Source: California State Board of Equalization county directory.
Riverside County Prop 8 Filing Steps
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Check if your property qualifies
Run your address or APN through vulorean.com to see if your assessed value exceeds current market value as of January 1. Note: if your property received a Prop 8 reduction last year, the Assessor automatically reviews it again — you may not need to file. Check your value on the Riverside Property Info portal.
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Get your Vulorean valuation report
The report produces a market value opinion as of the January 1 lien date and includes comparable sales. Choose DIY (you file using the report) or Concierge (Vulorean handles everything from here).
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Submit your Decline-in-Value reassessment application with your report
Riverside County has a dedicated online Decline-in-Value Reassessment Application. Deadline: November 1. No fee.
DIY Complete the online application and attach your Vulorean report as supporting documentation.Concierge Your Vulorean rep handles the form completion and submission on your behalf.- Decline-in-Value Application (online): rivcoacr — Decline-in-Value Application
- Prop 8 info page: rivcoacr.org/decline-in-value-proposition-8
- Assessor phone: (951) 955-6200
- Assessor toll-free: (800) 746-1544
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Await assessor response
DIY Applications received before July 1 will have the updated assessed value posted online after July. Applications received after July 1 receive written notification. If approved, value is reviewed automatically each year.Concierge Your Vulorean rep monitors the response and keeps you informed. -
Formal appeal if denied
DIY File an Application for Changed Assessment (BOE-305-AH) with the Riverside County Clerk of the Board between July 2 and November 30. No filing fee. File in parallel with step 3 — if the Assessor has not completed your review before the Nov 30 appeal deadline, you will lose your right to appeal that year without a filed formal appeal.Concierge Your Vulorean rep handles the appeal filing on your behalf.- Assessment Appeals info: rivcoacr.org/AssessmentAppeals
- Clerk of the Board site: rivcocob.org
- Clerk of the Board phone: (951) 955-1060
Riverside County reminder: California's Prop 13 caps annual taxable value growth at 2%, so a successful appeal keeps paying dividends every year your market value sits below the Prop 13 base. Prop 8 is the complement. It lets you capture temporary market dips. Both paths run through the Riverside County Assessor in Riverside.
When You Probably Qualify for a Riverside County Reduction
- Your current assessed value is above recent sales of comparable homes in Riverside County
- You bought in Riverside County in the last 12 months below the county's assessed value
- Your Riverside Assessor parcel record has errors, wrong square footage, added features that don't exist, or incorrect grade
- Your home has unrepaired damage, structural issues, foundation settling, or major deferred maintenance
- Your neighborhood's market softened but the Riverside Assessor hasn't adjusted
Riverside County Appeal Package · $50 Flat
We pull your Riverside County Assessor record, build comparable sales, and produce a filing ready BOE-305-AH appeal in 48 hours. You keep 100% of the savings.
Start My Riverside County Appeal →Riverside County Property Tax FAQ
When does Riverside County mail assessment notices?
California counties, including Riverside, typically mail notices in June or July. Your window to file BOE-305-AH opens July 2 and closes either September 15 or November 30 depending on the county's Clerk of the Board schedule. Confirm with the Riverside Clerk's office.
Do I have to use an attorney?
No. The California Assessment Appeals Board is designed for pro se homeowners. Filing BOE-305-AH is a two page form and hearings are informal. Most Riverside County homeowners file and represent themselves.
Will my Riverside County taxes go up if I appeal?
No. California appeal outcomes at the Assessment Appeals Board are strictly reductions or no change. Prop 13 caps assessed value growth at 2% per year regardless.
Is Prop 8 the same as Prop 13?
No. Prop 13 is the base year rule that caps annual assessment growth. Prop 8 is the companion rule that lets the assessor (or you) temporarily drop your value below the Prop 13 base when the market falls. When the market recovers, your value can rise back up to the Prop 13 cap, but not above it.