You are required to obtain a business license. You must obtain a business license from Alameda County only if you are conducting any type of business, including leasing residential and commercial property.Completing the Business Property Statement (Form 571L). Appealing an Assessment. A Business License is an annual tax you pay each calendar year for doing business within the unincorporated area of the County of Alameda. Obtain all appropriate City of. Alameda Permits and approvals. Who must obtain a seller's permit? What does engaged in business mean? Should you have any questions regarding the completion of this form, please contact the Assessor's Office at (510) 272-3800.