Remodeling a home is a big undertaking, but a well-planned home addition will pay for itself time and time again. Boost your home 's value and extend its square .Jump to Will the Addition Add Value to Your Home? - Because they 're among the most expensive home projects, additions sometimes return less .Browse these inspiring home addition ideas, pictures ands. Mid-Century Modern Prefab Addition. HGTVRemodels follows a creative couple as they build a prefab addition in their bare backyard, featuring modern design and extra officee..