When you are buying an old house, doing a home inspection is very obvious. Many people prefer doing a home inspection before buying the house to have a better idea about the condition of the house before committing to purchase it. 
However, doing the home inspection does not seem to be an obvious idea for a brand-new house to many people. Well, you should get a home inspection of the newly constructed house. Because contrary to what most people believe, new homes are not perfect.
Many purchases also have the concept in mind that builders are responsible for doing all the future repairs, and even if the builder is not doing them, a new home warranty will handle those issues. But it does not work like that.