Witches’ stairs, an unusual architectural design, gained traction on TikTok in March a few years ago. Despite their mysterious name, these stairs don’t have roots in superstition. They are instead a smart, space-saving solution that is both functional and visually appealing when properly built.

What Are Witches’ Stairs?
Witches’ stairs, also called “alternate tread stairs,” are designed to save space while still providing access between floors. They are often found in attics, lofts, and tiny houses—places where every inch counts. While the name might evoke images of folklore, the real purpose of witches’ stairs is purely practical.

How Do Witches’ Stairs Work?
The layout of witches’ stairs is unique because it combines space efficiency with functionality. Unlike traditional stairs, each step is only half as wide, and the steps are staggered. This arrangement allows the staircase to fit in narrow spaces while still enabling people to ascend or descend safely. In addition to saving floor space, these smaller staircases can double as storage for books, trinkets, or other items.

Scott Schuttner, the author of Basic Stairbuilding, explains that alternate tread stairs provide more tread area for each step, effectively making them safer despite their unconventional design. Witches’ stairs are also up to building codes and safety standards across the U.S. While typical staircases are about 3 feet wide, residential witches’ stairs are usually 27 to 30 inches wide, meeting the necessary regulations while occupying less space.