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.Exemption. Complete form BOE-266, Claim for Homeowners'. Property Tax Exemption. Claim for Homeowners' Property Tax Exemption, BOE-266, DOWNLOAD. It is a local option to establish two separate property tax rates: a lower tax rate for residential property owners. Welcome to the Alameda County Treasurer-Tax Collector's website. Our staff has worked hard to provide you with online services that provide useful information. Beginning March 1 property taxes must be paid at Oakland County. Beginning March 1 property taxes must be paid at Oakland County.