IRWIN BUILD: Crafting your vision, Building our Legacy. Dynamic and results-oriented Design-Build general contracting firm rooted in Bucks County, Pennsylvania. Irwin Build operates as a subsidiary of Mark Irwin Associates Inc. We specialize in all aspects of residential & commercial remodeling and renovations. Our company stands to deliver unparalleled expertise with an established reputation for excellence. Established in 1987, Irwin Build stands as a prominent subsidiary of Mark Irwin Associates, a distinguished entity specializing in large loss commercial, residential and industrial insurance claim restoration. Founded with a vision of excellence, Mark Irwin Associates quickly became a trusted name in the industry, known for its expertise in handling complex restoration projects.