2055 L St NW 1
2055 L St NW 2

2055 L Street, NW

Vertical expansion and renovation of a seven-story, existing cast-in-place concrete office building originally constructed in 1964. The single-story addition is framed with steel and incorporates the existing penthouse into the new office level. The added level brings the main roofline of the building to a similar height of the adjacent buildings.

Elevators were extended and stairs added to serve the new level. A large amount of mechanical equipment was relocated to a new, screened, high-roof equipment area. The new curtain wall enclosing the addition is designed to blend with the existing façade below. The added level features an outdoor terrace and trellis.

Project Details

CLIENT

Monument Realty, Nelson Architects

Location

WASHINGTON, DC

Square Footage

300,000

Year Completed

2013