Floor-space

Second, to appropriate the wall-surface and a part of the floor-space of the western wing of the building to mineralogy and geology.

Source: wiktionary

When the court is used at quarter sessions and petty sessions several magistrates sit together, so that the floor-space of the bench ought to be considerable, sufficient perhaps for ten or twelve magistrates.

Source: wiktionary

It is safe to assume that it is wise to sacrifice floor-space of rooms for closets, for they secure not only comfort, but order and neatness in the appearance of the house.

Source: wiktionary

This division of the room makes it more difficult to furnish and less comfortable to live in, besides wasting all the floor-space between the chimney and the door.

Source: wiktionary