3 Ways to Build a Handrail - wikiHowHow to build a Handrail. Three Methods:Getting Ready to buildMounting a Handrail on a WallInstalling a Handrail Using BalustersCommunity Q&A. Stairways are centerpieces in the home, often serving both a practical and decorative purpose. building a handrail yourself is an inexpensive way to add a new look and feel to stairs in your home, whether indoors or outdoors. A customized rail provides an elevated aesthetic value as well as ensuring that the staircase is safe to use.