Building extensions are structures added to existing buildings to create more space or enhance functionality. They can be used for various purposes, such as adding extra rooms, expanding kitchens, or creating home offices. Extensions can be single or multi-story and are designed to blend with the original architecture. The process of constructing a building extension typically involves planning permission, design considerations, and construction work. Homeowners often consult with architects or builders to ensure the extension meets local regulations and complements the existing structure. Proper planning can lead to increased property value and improved living conditions.