Irwin & Leighton provides quality construction services to prominent organizations from the corporate, educational, healthcare, pharmaceutical, and retail sectors. Buildings are rated by LEED standards established by the U.S. Green Building Council which defines LEED as “the nationally accepted benchmark for the design, construction, and operation of high performance green buildings. Our corporate excellence program focuses on consistently achieving customer satisfaction that guides the firm’s control of quality, cost, and schedule for every project.