Facade or façade is generally one side of the exterior of a building, especially the front, but also sometimes the sides and rear. The word comes from the French language, literally meaning "frontage" or "face".
In architecture, the façade of a building is often the most important from a design standpoint, as it sets the tone for the rest of the building. Many facades are historic, and local zoning regulations or other laws greatly restrict or even forbid their alteration.
The façade of a modern building is one of the most expensive and important elements of building construction.