Only consider hiring contractors with a reasonably high level of insurance. Working on interior doors requires a contractor to bring a lot of tools and equipment through your home. If he or she damages anything along the way, you don't want to be stuck paying for the repairs. Hiring a contractor with insurance will help protect you if something gets broken and needs to be repaired.

Find out if the contractor has any references for you to check. Most contractors seeking work in someone's home will have references on hand for you to check. Contractors realize that you don't want to let just anyone in your home. As a result, most of them will be very comfortable providing you with references.

Get an estimate before work begins. The contractor should be able to give you a reasonably accurate estimate of what the job will cost you. This is because installing interior doors is not the type of project usually becomes complicated. More straightforward work is more likely to be handled quickly and on budget.