Many developers provide buyers with a one-year home warranty. This may be something you want to negotiate for if it is not offered. The standard warranty offers a buyer of a new home a 10-year warranty against certain physical defects, such as faulty roofing, heating, electrical services and plumbing. A one-time insurance premium averages about $2 per $1,000 of the home's selling price. The cost may be paid by the broker, seller or buyer, or it may be shared.