L-shaped staircase

01 /How the 90-degree turn is arranged

An L-shaped staircase with a 90-degree turn (also known as a quarter-turn stair) is a configuration of two flights placed at a right angle to one another. Seen from above, it forms the letter «L».

Such stairs are usually installed in a room corner to make the most effective use of space.

There are two main ways to connect the two flights:

Through an intermediate landing

A flat horizontal landing (usually square) is installed between the lower and upper flights. This is the classic, very comfortable, and safe option.

Using winder steps

Instead of a landing, the turn uses several wedge-shaped (tapering to one edge) steps. This option lets you make the stair even more compact, but walking on winders is less comfortable, since on the inner side of the turn the tread is too narrow to support the foot.

02 /Advantages

Space saving

It occupies far less length than a straight stair and fits room corners perfectly.

Use of space

There is enough space under the upper flight and the landing to host a closet, built-in wardrobe, guest bathroom, or a small workspace.

Safety and rest

A stair with a landing provides a chance to rest while climbing. Additionally, the landing stops a fall: if someone slips on the upper flight, they will not tumble all the way down.

03 /Disadvantages

Complex design and installation

Requires more precise calculations and greater craftsmanship in assembly (especially the winder variant), making it more expensive than a straight stair.

Trouble moving bulky items

Carrying a long sofa, a non-disassembled wardrobe, or a large mattress to the second floor is harder because they must be turned 90 degrees in a confined space.