Home › States › California › Orange County
Orange County · CaliforniaAppeal Your Orange County Property Tax.
The Orange County Assessor's office in Santa Ana 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.
Orange County Assessor
Source: California State Board of Equalization county directory.
Orange County Prop 8 Filing Steps
-
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. You can also request a copy of your Property Value Notice from the Assessor at (714) 834-2727 or check the Property Value Notices page.
-
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).
-
Submit your informal assessment review request with your report
Orange County has a dedicated online "Request for Informal Assessment Review" — filing window is January 1 – April 30. Important: this is earlier than most California counties. No fee required.
DIY Complete the online form and attach your Vulorean report as supporting documentation. Submit by April 30.Concierge Your Vulorean rep handles the form completion and submission on your behalf.- Informal review form: ocassessor.gov — Request Informal Assessment Review
- Decline in Value info: ocassessor.gov — Declines in Market Value
- Assessor phone: (714) 834-2727
- Assessor office: PO Box 628, Santa Ana, CA 92702
-
Await assessor response
DIY If approved, you will receive a Value Notice in July reflecting the reduced taxable value, which is then used to calculate your annual tax bill. Reviewed annually — no need to re-file.Concierge Your Vulorean rep monitors the response and keeps you informed. -
Formal appeal if denied
DIY File an Assessment Appeal Application (BOE-305-AH) with the Orange County Clerk of the Board between July 2 and November 30. No filing fee. Original signature required — online initiation does not substitute for mailed or in-person submission. File in parallel with step 3 if the April 30 informal deadline has passed.Concierge Your Vulorean rep handles the appeal filing on your behalf.- Assessment Appeals info: cob.ocgov.com — Should I File an Assessment Appeal
- Clerk of the Board phone: (714) 834-2331
- Clerk of the Board office: 400 W. Civic Center Drive, Room 110, Santa Ana, CA 92701
Orange 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 Orange County Assessor in Santa Ana.
When You Probably Qualify for a Orange County Reduction
- Your current assessed value is above recent sales of comparable homes in Orange County
- You bought in Orange County in the last 12 months below the county's assessed value
- Your Orange 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 Orange Assessor hasn't adjusted
Orange County Appeal Package · $50 Flat
We pull your Orange 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 Orange County Appeal →Orange County Property Tax FAQ
When does Orange County mail assessment notices?
California counties, including Orange, 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 Orange 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 Orange County homeowners file and represent themselves.
Will my Orange 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.