Ask the contractor if he or she has a portfolio that you can look at. This portfolio will give you the best idea of what the contractor is capable of. Sunrooms come in many shapes and sizes. Therefore, it is important to know that you're dealing with a contractor that can actually make your design a reality.

Ensure your contractor is licensed. Adding a sunroom onto your currently existing home will require your contractor to be licensed throughout the state. Most state websites or local government offices will be able to tell you what licenses are necessary for this type of work.

Get an estimate from your contractor before work starts. Any reputable contractor will be able to give you a reasonable estimate for the work you need. It is important that you are willing to treat this estimate as something that can change with time.

Draw up a contract that will outline the exact requirements of the job. This is a great tool to protect yourself if any problems arise, but this is not the primary role of the contract. Very simply, the contract will lay out the exact expectations that you have for your contractor.