The Service Employees International Union (SEIU) was founded in 1921 as a union of flat janitors. Over the years it has grown in size and scope, now comprising three divisions: healthcare, property services, and public services. During the early 1980s SEIU sought new office space and constructed a new building at 1313 L Street, Washington, D.C. The materials within the SEIU Administrative Services Department Records are primarily from Eileen McCormick, the SEIU supervisor of the new construction project, and detail the process of building this new space. Record formats include requisitions, correspondence, floor plans and blueprints, and photographs of construction and building artwork. Additionally included in the collection are some administrative records from Carole Pooling during her time as Special Assistant to the Secretary-Treasurer. These records primarily include requests from SEIU International leaders John Sweeney, Richard Cordtz, and Bob Welsh, as well as Canadian financial records (receipts and expenses).