Why do construction projects take so long in general?
This is a pretty loaded question. Is there a certain type of project you're referring to? Every construction project that's not a rinky dink backyard contractor project has what's called a critical path schedule where it's all scheduled out ahead of time. There are a million things that affect the length of a project. For example, concrete takes 28 days to cure. So once you pour footings, you can't just throw steel on it right away.