Once you have decided to build your dream house and you look for a contractor to build it for you, you must ask the contractor a few questions before hiring him.

Ask him how long he has been in the business. An experienced contractor will give better results than an inexperienced one.

Find out if he has a state or county license or not. Check the license personally for its validity.
Who will get the permit for construction? Many states require construction permit and the contractor gets it mostly. If your contractor refuses to get it for you, then you must find some other contractor.

Has he constructed homes like yours? The contractor might be in business for long but may not have constructed houses like you are making thus he will be of little use to you.

Does the contractor have some references? If he gives you the reference, go and visit the houses as it will give you a clear vision of his capabilities. Also, talk to the customers to know whether they are satisfied or not.