State law requires that all business personal property be assessed annually for property tax purposes. Businesses will be required to self-certify that the business is allowed in the zone that applies to the property where the business activity will be conducted.Business personal property refers to all other types of property used in a business, such as machinery, equipment, tools, and furniture. A Property and Business Improvement District (PBID) is a tool available to property and business owners to improve a downtown or other commercial area. A sole proprietorship is the easiest to form and gives you, the owner, complete control. Real property refers to land and anything permanently attached to it. Under California's Civil Code, real property refers to land, and things affixed to land such as houses. (Civ. Understand how these legal protections apply to your business. 2. Patents for Innovators. Landowners or lawful occupants who want to control access to their property and prevent timber theft may post signs warning people to keep out.