Make sure the contractor offers a warranty for both materials and workmanship and make sure it is in writing.
Committed to high-quality work
Ethical in their business dealings
Established, proven and reliable
Willing to stand behind their work
Committed to their industry
Insured and committed to safety
Trained and experienced
Be wary of contractors with very low bids. They may have to cut corners to make a profit. Remember, price is only one of the criteria for selecting a contractor.