Balfour Beatty has officially broken ground on Portals IV, the latest and final addition to Republic Properties Corporation's renowned Portals Complex at 1301 Maryland Avenue SW in Washington, D.C. This $260 million residential development will conclude the decades-long transformation of a high-profile site overlooking the Tidal Basin and many of the nation’s most iconic landmarks.

Portals IV, also known as 1301, will add 356 luxury residences within a 525,000-square-foot structure, rounding out the Portals Complex, which now totals roughly three million square feet and has a market value of more than $2 billion. The complex already features Class-A office buildings and the high-end Salamander Hotel, and with 1301 joining its sister building 1331, the final phase will fully integrate upscale residential offerings into the mixed-use site.

Designed by WDG Architecture with interiors by Akseizer Design Group, 1301 will offer a suite of elevated amenities, including a rooftop terrace with a pool, sky deck with firepits and grills, piano lounge, coworking areas, game lounge with a sports simulator, dog spa, and fitness center.

"We are honored to be the construction partner for this iconic project that will complete the vision for the Portals development," said Art Malacarne, Balfour Beatty senior vice president of Mid-Atlantic operations. "Our expertise in delivering successful projects across Southwest D.C. demonstrates our deep understanding of this unique development and our ability to deliver complex construction projects in one of D.C.'s most prestigious locations. We look forward to continuing our partnership with Republic Properties and contributing to the transformation that will set new standards for luxury residential living in the nation's capital."
The groundbreaking of Portals IV represents more than just another residential project—it’s the final piece in one of the most prominent real estate undertakings in Washington, D.C. Positioned at a key gateway to the city’s monumental core, the development reflects the culmination of a strategic public-private partnership that has helped revitalize Southwest D.C.

With unmatched views, premium amenities, and proximity to both federal buildings and cultural institutions, Portals IV is poised to attract professionals, diplomats, and executives seeking luxury living in a walkable urban setting. Balfour Beatty’s involvement ensures the project benefits from a proven track record of complex urban construction and an emphasis on quality and precision.

As the final installment of the Portals Complex, the new building not only enhances the skyline but also sets a new benchmark for high-rise living in the capital—fusing architectural elegance with community connectivity. Completion is expected to further enhance the neighborhood’s profile as a destination for luxury and mixed-use innovation.

Originally reported by Balfour Beatty.