Internal Revenue Service Building New Facade

The advent of WWII interrupted the construction of the IRS Building on Pennsylvania Avenue.  Started in the 1930s, the two façades, at 11th and 12th Streets, remained unfinished for more than 50 years until KCCT was commissioned to complete the project. We designed a 20,000 SF addition, new façades, a new entrance and plaza. We matched the stone coursing, granite water table, rusticated stone, smooth limestone ashlar, entablature, and fenestration. And we modified the attic to allow the new roofs to match the existing, all while honoring the Federal Triangle Master Plan. Plus, KCCT delivered the project $1 million under budget.



Washington, DC


20,000 SF


GSA/National Capital Region




• Architecture
• Historic Preservation
• Construction Administration