About Checkers Welcome to Checkers web site. We are one stop architectural and engineering Computer Aided Draughting services company based in Warrington, UK. We offer a CAD draughting and tracing service to the building services industry, and cover multi-discipline contracts for building service works, including civil, architectural, electrical and instrumentation, mechanical and HVAC. On the site we tell you more about our CAD services, who we work for, our personnel and why you should consider Checkers when you have CAD draughting needs. Please enjoy your visit.