The invention discloses a single layer board house suitable for board house areas of the high building density, which mainly comprises a frame, an entrance outer wall, a top outer wall, a back partition wall, a side partition wall, a side gable, a large sloping roof, a small sloping roof, a door, side windows and side high windows, wherein the side high windows are arranged on the outer wall of the top of each of the houses, and the entrance door and side windows are arranged on the entrance outer wall. When the method for reducing or canceling the space between board houses is utilized for planning single layer board house settlement areas of the high building density, the back space of present double-side lighting single layer board houses is canceled, so that the land is intensively used, higher plot ratio is achieved compared with the present double-side lighting layout, the problem of neighborhood disturbances caused by the closeness of back windows on the backs of board houses is solved, ignored sanitary corners of settlement areas are cleaned, and the air ventilation environment of areas and interiors is improved; and the design of windows of the board houses is beneficial to indoor lighting and air ventilation, and the living environment of present single-side lighting board houses is improved while the present layout plot ration of single-side lighting is kept the same as before.