If you are strictly looking for a , MAJ Stair is the top recommendation. It is a dedicated freeware extension for drawing various stair types quickly.

Master the Art of 3D Stairs: How to Find and Use an Instant Stair Plugin for SketchUp

Instant Stair is a productivity plugin designed to automate the creation of stairs. Instead of manually drawing rise and run lines, extruding treads, and calculating angles, this plugin allows you to draw a simple line or curve and instantly convert it into a detailed staircase.

Before we dive into the download links, let’s talk about why this keyword is so popular. Modeling a staircase in native SketchUp requires: