The upstairs is not directly visible from the bottom of the stairs, which can provide more privacy for the upper floor. A fall can be arrested at the landing. Though the landings consume total floor space, there is no requirement for a large single dimension, allowing more flexible floor plan designs. For larger stairs, particularly in exterior applications, a landing can provide a place to rest the legs.

Where there is insufficient space for the full run length of normal stairs, alternating tread staircases may be used. Alternating tread stairs allow for safe forward-facing descent of very steep stairs. The treads are designed such that they alternate between treads for each foot, one step is wide on the left side, and the next step is wide on the right side. There is insufficient space on the narrow portion of the step for the other foot to stand, hence the person must always use the correct foot on the correct step. The slope of alternating tread stairs can be as high as 65 degrees as opposed to standard stairs which are almost always less than 45 degrees. The advantage of alternating tread stairs is that people can descend face forward. The only other alternative in such short spaces would be a ladder which requires backward-facing descent. Alternating tread stairs may not be safe for small children, the elderly or the physically challenged. Building codes typically classify them as ladders and will only allow them where ladders are allowed, usually basement or attic utility or storage areas not frequently accessed.

When you want a staircase in your house, you have to decide which style you want. You can choose winder stairs or spiral stairs. You have to decide if you want stair carpeting or a wooden stairs.