About Custom Stair Builders, Inc We realize that First Impressions can last a lifetime, that is why we take pride in manufacturing beautiful stairways that will add to the uniqueness and value of your home. Since 1988 we have steadily grown on the strength of our products. Specializing in the construction and design of custom built wood stairways and stair parts for commercial and residential, serving the east coast. We are located in Chambersburg, Pennsylvania. Franklin County and have built and installed stairways as far North as Greenwich, CT. and as far South as Washington, DC. Our goal is to provide excellent service with a superior product at competitive prices.