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.If you do not have this certificate, you must submit a petition to the RAP to get this certificate. Complete form BOE-266, Claim for Homeowners'. Property Tax Exemption. Exemption applications must be filed with your local assessor's office. See our Municipal Profiles for your local assessor's mailing address. Renew or Apply for Your Exemption For assistance, contact the District's Parcel Tax Help Desk at (510) 879‐8611 (Monday‐Friday, 8 am to 3 pm). All of the above exemptions require completion of an application to the local town office where the property is located. Though all property is assessed, not all of it is taxable.