Technically speaking, Texas does not have a general contractor license. If you are performing "specialty" work such as electrical or HVAC contracting (among others) you will need a license but otherwise, there no issue. Cities and counties, though, do have the right to require licenses. There are several types of contracting licenses, for a general contractor you will probably need all of them. For instance in Texas, the license fee for plumbers is $155, an electrician is $50, etc.