I think the shape of the staircase is silly because it "misses" the entrance door. The staircase can spread out on the sides, but the toffelveranda should not end in mid-air. Before deciding how to rebuild the staircase, you should check its step measurements in depth and height. Twice the step height plus a step depth measured in cm should be 60-62. If it doesn't match, you should remove the old staircase before building a new one.