2101 L Street, NW

Transformation of an existing 10-story office building, originally built in 1975, into a Class “A” structure.  The modernization of the base building  included: the replacement of the former facade with a modern, metal, and glass curtain-wall system; removal of all previous interior improvements; the systemic upgrade of the mechanical, electrical, plumbing (MEP), and life safety systems; modification of the service core and the addition of a new entry and entry canopy.  The base building received the 2008 NAIOP Award of Excellence, Best Urban Renovation award.

In addition to the base building modernization, SK&A also provided various tenant build-out services, including structural design services for the U.S. Green Building Council (USGBC) Headquarters.  The two-story, 75,000 sf build-out for USGBC was designed to achieve a platinum rating under the LEED-C1 Version 3.0 system.  The project received the Best of 2009 Project of the Year for Interior Design/Tenant Improvement from Mid-Atlantic Construction.

Potomac Center North, 500 12th Street, SW

The renovation and expansion of the Class "A" Potomac Center building was delivered in two phases.  The second phase focused on the north portion.  Like the previous expansion completed on the south portion, the existing structure on the north portion was eight levels above grade (291,000 gsf) and three levels below grade (151,000 gsf).  Approximately 229,000 gsf of new space was added through the application of both vertical and horizontal expansions.

Similar to the south-side portion of the project, the horizontal expansion added reinforced concrete bays to floors two through eight.  The flat plate design of the expansion was similar to the original structure in order to allow for proper ceiling heights.  The building was also expanded vertically by adding three steel-framed levels above the original roof level, plus a new roof and penthouse, matching the earlier south portion modifications.  The new upper levels were designed of composite steel, using 12-inch deep beams and girders in 20-foot bays in order to minimize the dead load added to the existing columns and foundations.  The foundations were upgraded using mini-pile underpinning.  

The entire facade was replaced and the core re-worked to accommodate new mechanical, electrical, and plumbing (MEP) systems.  Structural security features were also added to meet tenant and GSA requirements.

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.

20 M Street, SE

This 10-story, Class “A” reinforced concrete office building with four levels of underground parking is located in the rapidly transforming Capitol Riverfront neighborhood, near the Washington Nationals baseball stadium.  Easily accessible to the Navy Yard Metro Station, the site contains office space (201,000 sf), parking (89,300 sf), a health club, and an expanded penthouse.

The building is founded on a mat foundation with a tangent pile system installed to control ground water.  The exterior design features a prominent metal rooftop canopy complemented by a smaller canopy over the entrance to the lobby.  Nine-foot high ceilings and 30-foot flat floor plates provide flexible open floor plans for tenant fit-outs.  The project ultimately received LEED Gold certification.

1000 Connecticut Avenue, NW

Located on the northwest corner of K Street and Connecticut Avenue (and adjacent to Farragut Square), this new Class “A”, trophy office building has a multi-faceted exterior façade incorporating glass, stainless steel, and granite materials.  The structure has twelve above-grade levels, four below, and an additional vaulted area that extends under the sidewalk on the K Street side of the building.

A canopy runs the length of the lobby on K Street, as well as certain long-span conditions over the lobby.  The building’s parking garage features a semi-circular ramping system.  Certified LEED Platinum, amenities within the building include restaurants, an on-site cafe, rooftop terrace, bike racks, and a fitness center.