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Step #2: Make sure you meet the initial requirements General Engineering Contractors License (E100) – allows you to perform work such as water supply, drainage, inland waterway, irrigation, hydropower, sewer, flood control, etc but does not allow you to work on residential or commercial properties.Residential and Small Commercial Contractors License (R100) – allows you to do work on residential properties (single or multi-family home that has 4 units or less) and/or work on small commercial properties (anything that is 3 stories or less w/ less than 20k sq.General Building Contractors License (B100) – allows you to work on a building structure of any kind (remodeling, repairing, building, etc) but does not allow for plumbing, electrical, or mechanical work.Step #1: Determine what kind of classification you/your business falls into
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