You need to evaluate the warranty language itself. Warranties offered by builders in this area vary widely. Some cover the home for a year after closing. Others cover some parts of the home, typically structural elements, for 10 years. Some cover concrete flatwork (e.g., basement floors and driveways) if there is differential movement of a 1/4-inch or more. Some explicitly exclude any coverage of flatwork. I wouldn’t make a buying decision solely on the basis of the warranty, but you need to know what the warranty covers before you sign.