AppealSealAppealSeal Knowledge
Knowledge
Step-by-step property tax appeal guides organized by topic and jurisdiction.
California
AppealSeal vs. Ownwell: DIY vs. Full-Service Property Tax Appeals
A neutral comparison of DIY property tax appeal tools (AppealSeal) versus full-service representation (Ownwell) — pricing, process, and when each makes sense.
How California Property Tax Appeals Really Work
Learn how California’s property tax appeal process works. Understand the roles of the Assessor’s Office, the independent Assessment Appeals Board, and how to file Form BOE-305-AH to challenge your property’s assessed value.
DIY California Property-Tax Appeal: Decline-in-Value (Prop 8)
A step-by-step guide for homeowners when the market value on January 1 is below the assessor’s value.
Can I appeal property taxes with just one comparable sale?
There is only one comparable sale for my property tax appeal year, can I still appeal?
How to Appeal Your Property Tax Value in Los Angeles County
A specific guide to the appeal of the assessed property value for Los Angeles county
Property Tax Comparison Templates
Standard templates and examples for property tax analysis and comparisons
California Counties
Los Angeles County Property Tax Appeal
How to file a 2026 Los Angeles County property tax appeal, including the deadline, AAB-100 form, $46 filing fee, and submission options.
Orange County Property Tax Appeal
How to file a 2026 Orange County property tax appeal, including the deadline, online application portal, mailing steps, and unresolved fee status.
San Diego County Property Tax Appeal
How to file a 2026 San Diego County property tax appeal, including the deadline, application PDF, mail and in-person submission, and fee caveat.
San Mateo County Property Tax Appeal
How to file a 2026 San Mateo County property tax appeal, including the deadline, Clerk of the Board filing path, and unresolved form, fee, and submission details.
Santa Clara County Property Tax Appeal
How to file a 2026 Santa Clara County property tax appeal, including the deadline, Assessment Appeal Application, filing fees, and online file-and-manage path.