Methods, machine-readable media, and devices for floor plan space detection are described herein. For example, one or more embodiments include receiving an image of a floor plan, enhancing the image of the floor plan through processing, detecting a location of a door associated with a space in the image of the floor plan through a histogram of gradient of pattern feature, setting a seed in the space based on the location of the door associated with the space, spreading the seed in the space until the seed reaches a boundary of the space, and associating the seed that has been spread with the space.