A-One Group Ltd. is a full service union masonry contractor specializing in commercial, industrial and institutional construction; serving Northern Illinois and surrounding counties in Indiana and Wisconsin. Our firm's objective is to complete all projects entrusted to us with the highest class of safety and competency. By employing highly skilled union craft workers in combination with the most up to date masonry equipment we are able to provide our clients with competitive pricing and assure timely completion of any masonry project.