A house is the most expensive thing to build. The cost of a house varies depending on what type of house you are building and where you are building it. A smaller, simpler home is usually cheaper to build than a larger, more complex one. A single-story home is also cheaper than a two-story home. A few factors that can make your house cheaper to build are the size of your lot, the location, and whether or not you plan on using an architect or designer for your project.