The invention provides a residential building in which the room storey height resources are reserved in advance and enlarged in the odd even storey staggered architectural space mode, wherein the horizontal projections of the architectural spaces of two up-and-down adjacent houses arranged on the odd storey and the even storey respectively are mismatched; for houses on the odd storey and houses on the even storey, the architectural space of at least one bedroom is staggered up and down; in the same unit, the houses on the odd storey are in vertical align with the architectural spaces staggered on the odd storey and the even storey, and the houses on the even storey are in vertical align with the architectural spaces staggered on the odd storey and the even storey; the storey height of the architectural spaces staggered on the odd storey and the even storey is larger than the storey height of sitting rooms not staggered on the odd storey and the even storey, and smaller than twice height of sitting rooms not staggered on the odd storey and the even storey, and the staggered storey staggered plate structure is adopted; by the reservation of storey height and the addition of horizontal clapboards, the storey height resources of a room are enlarged; and walls around the architectural spaces on the odd storey and the even storey are main walls. In the invention, under the condition of not increasing floor spaces, the use space is enlarged, and resources are effectively saved.