Choosing a house plan design is a big decision because it will shape how you live in your home. Modern house designs need to include so many different areas, such as multi-use spaces, open-plan living, smaller house ideas, multi-story houses, and maybe even underground solutions. So regardless of whether you’re going for something worthy of being on Grand Designs or just to buy off the plan, there’s a lot to think about. To help you get started on your home project, I’ve compiled 30 small house design ideas.