Exterior Signs (Sign Code Guides, Signs: Portable and Temporary #33) The types and amount of signage allowed for your business depends on the zoning, lot size, building size and if there is more than one business at the site. http://www.portlandonline.com/bds/index.cfm?c=45053&a=206630 Home Occupations Businesses operated out of your home may require a permit from the City of Portland. Restrictions applyregarding type of businesses allowed, onsite employees, customer traffic, etc. Food Establishments (Commercial Food Establishments #32) Businesses that prepare, package, serve, store, or otherwise provide food or beverages for public consumption are food establishments and have specific requirements. Vending Carts (Vending Carts on Private Property #31) Vending carts on private property may require a building permit. Change of Occupancy #30 Expanding, remodeling or changing your small business location may require site upgrades and/or a change of occupancy, which is a change from the building/site?s original use. Exterior Signs (Sign Code Guides, Signs: Portable and Temporary #33) The types and amount of signage allowed for your business depends on the zoning, lot size, building size and if there is more than one business at the site.