Building restoration is a process of renovating, repairing, or rebuilding an existing structure. There are a variety of synonyms for this phrase, including building rehabilitation, conservation, and preservation. Each of these terms refers to the process of improving the condition of a building, whether it's a historic landmark or a modern office block. Building rehabilitation typically involves substantial repairs to the structure and systems of a building, such as electrical or heating systems, while building conservation focuses on preserving the historical or cultural significance of a structure. Preservation, on the other hand, generally involves maintaining and protecting the existing architecture, without necessarily improving its function or updating its technology.