Example of a building renovation design, where the original structure is a single-story building, and the owner wants to convert it into a two-story building and expand the building sideways.
Choice: A, Elevate an existing single-story building to two stories and add stairs on the side of the structure.
Choice: B, Elevate an existing single-story building to two stories and add a staircase at the front entrance.
Choice: C, Raise the existing single-story building to two stories, expand the building on the side, and construct an internal staircase under the building.
