Wiktionary
floorspace
alt. The surface area of the floor in a building. n. The surface area of the floor in a building.
Usage examples of "floorspace".
Isaac’s laboratory had been a factory and a warehouse years ago, and its huge, dusty floorspace swamped the little benches and retorts and blackboards that perched in its corners.
The remaining floorspace of those three sub-levels housed leisure facilities not reliant on natural light, such as cinemas, night clubs, bars, shops and restaurants.
Holographic ads for everything from Slug-O-Cola to the latest in outerwear to the finest tooth sharpeners were festooned about the floorspace.