BXP Completes Acquisition of 2100 M Street in Washington, DC, With Sidley Austin, a 160-Year-Old Premier Law Firm, as Anchor Tenant

Global law firm Sidley Austin LLP signs lease for approximately 240,000 square feet as it continues to grow in Washington, DC

WASHINGTON, DC (December 15, 2025) – BXP (NYSE: BXP), the largest publicly traded developer, owner, and manager of premier workplaces in the United States, today announced that it completed the acquisition of 2100 M Street, located in the West End of Washington, DC. BXP plans to demolish the existing building and develop a new, approximately 320,000 square foot premier workplace. Global law firm Sidley Austin LLP (Sidley) has signed a lease for approximately 240,000 square feet of the future trophy property.

BXP acquired 2100 M Street for a gross purchase price of $55 million. Sidley will occupy 75% of the new premier workplace across the entirety of the fourth through tenth floors, including space on the rooftop / penthouse. BXP expects to commence physical construction of the project in 2028 to accommodate Sidley’s scheduled 2031 occupancy.

“We ended 2024 with an exciting acquisition in downtown Washington and we are thrilled to be closing 2025 with another,” said Pete Otteni, EVP, Co-Head of the Washington, DC Region at BXP. “This trophy redevelopment will contribute to the success of our clients and support the District’s overall office recovery. As prominent organizations, especially law firms like Sidley, continue to pursue high-quality workplaces, we are developing premier buildings that promote collaboration, connection, and productivity within our core markets, further reinforcing our reputation as the preeminent build-to-suit developer in Washington, DC and enhancing shareholder value for BXP.”

“Over the last 60+ years, Sidley DC’s Office has grown tremendously, while developing deep roots and dedicating itself to serving the Washington, DC, community and beyond,” said Kristin Graham Koehler, managing partner of Sidley’s office in Washington, DC and a member of Sidley’s Management Committee. “We are excited to work with BXP to build out this new state-of-the-art space and continue serving clients in the DC area as well as around the nation and the world.”

Sidley is a leading global law firm with more than 2,300 lawyers across 21 offices in key financial, regulatory, and commercial centers worldwide. With nearly 160 years of experience, Sidley delivers strategic counsel in complex transactions, regulatory matters, investigations, restructuring, and litigation.

Lou Christopher and Jordan Brainard of CBRE represented Sidley in this transaction. Eastdil Secured represented the seller.

Located in the West End, one of Washington, DC’s most desirable business districts, 2100 M Street offers convenient access to the Metro, major parkways, and is walking distance from a wide range of nearby amenities, including over 40 restaurants, 12 hotels and other retail and recreational offerings.

The acquisition of 2100 M Street reflects BXP’s continued focus on the development of high-quality properties in central business districts across its core markets. BXP ended 2024 with the acquisition of 725 12th Street NW, a site in the East End submarket of Washington, DC, that will be redeveloped into a 320,000 square foot premier workplace. In conjunction with that acquisition, BXP signed prelease agreements with global law firms McDermott Will & Schulte and Cooley for more than 80% of the building.