Please note that due to Proposition 19, there is a new form available for Base Year Value Transfers for Homeowners Age 55 Years or Older. For more information about the Homeowners' Exemption, please call (510) 272-3770. Address.To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located. This application E-Form allows you to state the reason why relief should be granted. You may upload documentation to prove your claim. Download PDF BOE-266 REV. Complete form BOE-266, Claim for Homeowners'. Property Tax Exemption. Total of 69 forms are available for Alameda County for 2024. The exemption discount will be applied 2 billing cycles after receipt of the application.