Building features refer to the various elements and characteristics that define a structure's design and functionality. These can include architectural styles, materials used in construction, and the layout of spaces within the building. Common features might consist of windows, doors, roofs, and walls, which all contribute to the overall aesthetic and practical use of the building. Additionally, building features can encompass energy-efficient systems, such as heating, ventilation, and air conditioning (HVAC), as well as sustainable materials that promote environmental responsibility. Accessibility features, like ramps and elevators, ensure that buildings are usable for everyone, including individuals with disabilities.