San Diego County lists its 2026 regular assessment appeal filing season as July 2 through November 30. The Clerk of the Board accepts applications; the Assessment Appeals Board hears disputes independently of the Assessor. The county also describes an informal Assessor review as a separate option. Read the county’s assessment appeal overview.
Official application routes
The county provides online, mail and in-person application routes through the Clerk of the Board. Its filing instructions distinguish those routes and describe how applications are checked for completeness. Read the application instructions.
Other notice types need a separate check
This guide covers the regular annual window. For supplemental or escape assessments, two county pages use different descriptions of the document that starts the deadline. The applicable trigger remains unresolved here; the Assessment Appeals Unit can clarify it using the actual document. Compare the dates page with the application instructions.
Find San Diego County’s current appeal instructions and contact details.
Sources checked October 9, 2026. FairPath provides document preparation services, not legal advice. You review your information and file and present any appeal yourself.