Free plan

In architecture, a free plan refers to the spatial flexibility made possible by structural systems in which interior walls are not required to be load-bearing. Because interior partitions have no structural purpose, they can be placed where ever they are needed to define individual spaces or rooms. The weight of the building is typically supported by a grid of columns.

The free plan was important for modern architecture with noted modernist architect Le Corbusier first proposing it in his 1914 Dom-Ino House prototype. He would later include it as the third of his "Five Points of a New Architecture". Free plans may be open plan.