
A: Solicit at least three bids for the work you need; do not automatically accept the lowest. Make sure all bids are based on the same set of specifications. Discuss the bids in detail with each contractor, and make sure you understand the reasons for any variations in price. Sometimes a higher price may be worth it, if the materials to be used are of higher quality or the work is more extensive.
Beware of any bid substantially lower than the others. It probably indicates that the contractor has made a mistake or is not including all the work quoted by his or her competitors. You may be headed for a dispute with your contractor if you accept an abnormally low bid.
Don't forget the old adage, "If the offer sounds too good to be true, it probably is!"