In architecture and building engineering, a floor plan is a drawing to scale, showing a view from above, of the relationships between rooms, spaces, traffic patterns, and other physical features at one level of a structure.A sample floor plan of a Caravanserai.An office plan.Church floor plan, St. Leonhard, Frankfurt, transformed from Romanesque to GothicRegistration floor plan of a condo (detail) In architecture and building engineering, a floor plan is a drawing to scale, showing a view from above, of the relationships between rooms, spaces, traffic patterns, and other physical features at one level of a structure.