S4U Stair can handle more than just straight runs. To create a staircase with a landing and a turn:
allows you to "crack" any flat face into a professional staircase in seconds. How it works: s4u stair crack top
The extension provides several modes to create different stair structures from selected faces: S4U Stair can handle more than just straight runs
If you need to add a handrail, check the option in the parameters menu and set the offset distance. The plugin will automatically create a railing along the open side of the stair. s4u stair crack top