Henderson Associates Architects (HAA) is a full-service architectural firm located in Edwardsville, IL, founded by William Henderson in 1976. For over a quarter of a century, HAA has provided innovative, functional and cost effective architectural services for a diverse range of clients and project types, regionally and nationally. HAA has always maintained a strong commitment to our client's needs which has been the foundation for the firm's success and longevity. the practice of providing cost effective and site sensitive design solutions has always been and will continue to be one of the firm's missions. While we are a business, we have an underlying passion for what we do and the service we provide. We humanize the process with personal commitment. We provide a better product and a better overall project experience by enjoying our work with our clients.