What is the term for an addition to property that increases its value or adapts it for a different use?

The correct term for an addition to property that increases its value or adapts it for a different use is "Improvement." This term specifically refers to any structural or non-structural changes made to enhance the property’s value, functionality, or capacity. Improvements often involve upgrading or adding features such as new rooms, advanced plumbing systems, or energy-efficient installations, thereby not only enhancing the property’s market value but potentially extending its useful life.

The other terms, while related to property changes, imply different scopes or purposes. Renovation generally refers to restoring or updating existing structures rather than the addition of new features explicitly aimed at increasing value. Enhancement can suggest a broader range of modifications, but it does not distinctly denote increased value or change in use. Restoration focuses on returning a property to a previous condition rather than making adaptations for different uses or increasing overall value. Therefore, "Improvement" is the most appropriate term in this context.