Harry S Truman Building D Street Pavilion

The D Street Security Pavilion is the first realized phase of the Department of State’s multi-phase Perimeter Security Improvements Master Plan to enhance security at the Harry S Truman Building. The plan’s objectives are to secure the building, protect employees and visitors, and improve the streetscape for pedestrians and neighbors. The D Street Security Pavilion provides a permanent enclosed addition for screening employees and visitors while serving as a ceremonial entrance.

To best understand and comply with the security improvement goals of the Department of State, KCCT developed a program of requirements for a master plan in direct consultation with key stakeholders. Additional stakeholders and regulators on this project included the National Capital Planning Commission, the US Commission of Fine Arts, the Advisory Council on Historic Preservation, the National Park Service, the District Department of Transportation, and the Department of Energy and Environment.

The master plan incorporates extensive landscaping with stormwater management features, which employ sustainable design and landscaping principles that not only reduce energy costs and waste, but create a pedestrian-friendly green environment that encompasses the site. Green spaces will be created along the sidewalks and within the surrounding property, including a “pocket park,” for public use at the northeast portion of the site. Rainwater is collected in a cistern for repurposing in a variety of applications, while generating stormwater credits for an open market. Other sustainable features include LED lighting, energy-efficient HVAC systems, and low-e insulated architectural glass.

All site upgrades were designed to meet Department of State standards for a secure campus. The D Street Security Pavilion is the first of four planned entrance additions. Its main purpose is to provide permanent screening outside the main building facades, thereby minimizing the possibility of transporting harmful devices inside the building proper. 

A glass and stainless-steel storefront system encloses the interior, enriching visibility, natural light penetration, and a sense of openness required for security sight lines. 





Washington, DC




Department of State


Department of State


• Architecture
• Master Planning
• Sustainable Design
• Security
• Historic Preservation
• Construction Administration
• Interior Design
• Programming