You'll need a contractor's license issued by your state. To see how to get this, visit http://www.contractors-license.org/
You need to attend school to gain the skills for general contractor's to get your license to make sure you are trained correctly.
You do not need a contractor license but you may need a permit depending on what your converting it into.
To become a licensed contractor for the state of Oregon you must first have a 2 year degree. Secondly you must pass a state test that is required to get your license.
You will need a college degree to become a certified contractor. You will also need a license from the state of California. California has an excellent website dedicated to the licensing process for contractors. There are many different locations where you can test and also many different focuses that you can test for. Check out the website here: http://www.cslb.ca.gov/
Normally a general contractor just needs a state license. Depending on what he does he may need additional licenses.
Whether a contractor can work under another's business license depends on the type of business license. If someone has a corporation then they can have a lot of businesses under their license.
Yes
The qualifications you need to be a building contractor are
Do i need a general contractor license for commercial jobs.
yes, unfotunatly i found out the hard way
Each State in USA have their own standards for plumbing jobs. Most States need the plumbers to hold general license, master license or contractor's license pertaining to that State.
GA law does require a license for a handyman