California Professional Codes regulate new homes sales as well as existing home sales. New home developers are required to disclose more information about the site rather than the history of specific home (because it doesn’t exist). If the home you are buying is yet to be built, builders normally have 1 year from the execution of the contract to build and deliver the home to you. 2-3 months before delivery of the home, you usually get to choose the finish material such as tiles, flooring, cabinet and countertop styles. Whereas in the case of existing home, what you see is what you get. Existing home sellers don’t modify their homes to fit a buyer’s taste.