Do I need a business license?

[Laura C.]

Dear fellow SoCal investors, 

For those of you who Wholesale and/or Fix and Flip in the Inland Empire (Riverside, San Bernardino, Ontario, Fontana, Rialto, etc.) do you have a business license? If so, is it through each individual city or a county? 

I have 2 entities that focus on real estate investments, but have yet to find a solid answer on whether I need a business license in this area. I would love to hear your input on the topic. 

Thanks!