According to statistics from the U.S. Census Bureau's 2018 Survey of Construction, the average time it takes to build a new construction house is roughly 7.7 months. This comprises approximately one month for building authorization and permits, followed by 6.7 months of actual construction, culminating in the final walk through. The number of days included in this estimate has not been adjusted for holidays or other special occasions. The first floor of your house will be built first, including the basement if needed. The second floor will be next, followed by the third floor and finally the fourth floor. Each floor requires different tools and techniques so they can be completed within the allotted time frame. When you order a house, you usually get a price quote based on the foundation size. A small foundation cost less to build than a large foundation. The price also depends on how many square feet there are on each floor. So if you have a big family or want more room, you'll need to pay more for more space. Most new houses are built with an interior finish out option. This means that the builder will either include the items you request in the custom design of the house or offer some basic options from which you can choose. An interior designer might be hired to help you select items such as furniture, rugs, and accessories since these things will have an impact on the overall look and feel of the house.