In architecture and interior design, an elevation is a 2D drawing that shows the vertical plane or flat side view of a building or structure. Elevations are one of the key types of architectural drawings, along with plans and sections, and are used to communicate the design and appearance of a building from different angles.

An elevation typically shows the exterior walls, windows, doors, and other features of a building, as seen from a particular direction. The most common types of elevations are:

1. Front Elevation: Shows the main entrance and front facade of the building, as seen from the street or primary approach.

2. Rear Elevation: Shows the back side of the building, including any rear entrances, terraces, or gardens.

3. Side Elevations: Show the left and right sides of the building, as seen from a perpendicular direction.

Elevations are drawn to scale, using standard architectural scales and conventions. They typically include dimensions, annotations, and graphic symbols to indicate materials, finishes, and other important details.

One of the main purposes of elevations is to provide a clear and accurate representation of the building's exterior design, including its proportions, symmetry, and visual hierarchy. Elevations are used by architects, designers, and clients to evaluate and refine the aesthetic and functional aspects of the building, and to ensure that it meets the desired style, character, and performance requirements.

Elevations are also used for construction and documentation purposes, providing detailed information for contractors, fabricators, and installers. They may include additional technical details, such as wall sections, window and door schedules, and material specifications, to ensure that the building is constructed according to the design intent.

In addition to exterior elevations, architects and designers may also create interior elevations, which show the vertical surfaces and features of a room or space, such as walls, windows, doors, and built-in furniture. Interior elevations are used to communicate the design and detailing of interior spaces, and to coordinate with other drawings and specifications.

With the advent of computer-aided design (CAD) and building information modeling (BIM) tools, elevations can now be generated automatically from 3D models, saving time and effort in the design and documentation process. However, the ability to create and interpret hand-drawn elevations remains an important skill for architects and designers, as it allows for greater flexibility, creativity, and communication in the design process.