Before hiring a contractor for the building of your sunroom, you should check and be sure of the unit whether they are fully insured or bonded, so that you are protected in more than one ways. Firstly, in case the work is not done properly then you have some way to get it fixed. Also if the person is injured while working or causes any damage to your home then you will not be held liable for those.

You should also ask if the company plans to use any sub-contractors for the construction of your sunroom. In that case you might also ask whether those sub contractors are licensed and insured or not. In order to be fully certain that you are working with a fully reputable professional in the field and there are no standing complaints against them with the local business guild.

When you are fully satisfied that the legalities are all in place then you can move on to getting information about some specific detail of the company. You may be asking to see a physical example of the sunroom that you wish to build. If the company cannot provide a model or a design from their office then you might as well ask if any of their customers can show you the design build already by them, as a reference.