Newmark Named Exclusive Leasing Agent for Landmark 25 Mass Office Tower in D.C.

April 10, 2025 9:00 AM

Newmark announces the company has been appointed as the exclusive leasing agent for landmark office building 25 Massachusetts Avenue NW (“25 Mass”) in Washington, D.C.’s Capitol Hill. Newmark Vice Chairman Doug Mueller, Executive Managing Director Edwin Clark and Associate Blaire McGavin will spearhead the 385,000-square-foot leasing assignment on behalf of ownership, Norges Bank Investment Management (“NBIM”).

“Having worked alongside NBIM for many years, I’m honored to continue this partnership at 25 Mass under Newmark’s platform,” said Mueller. “Our team’s institutional reach and first-hand knowledge of the opportunity—paired with a tenant roster that has consistently outperformed—create a powerful advantage in today’s changing office landscape:”

25 Mass marks the third office agency assignment awarded to Mueller and his team in less than two months since they joined Newmark, reflecting continued momentum and institutional confidence in Newmark’s strategic approach to premier D.C. assets. Mueller previously served as the leasing agent for 25 Mass while at another brokerage, bringing a longstanding partnership with the ownership group and in-depth familiarity with the property.

Ownership recently completed a series of improvements at the property, including a reimagined glass entry, new lobby, along with a tenant lounge and a state-of-the-art conference center that seats up to 127 people.

“From its dynamic amenities and modern infrastructure to a tenant mix resilient to macro shifts, 25 Mass delivers on every front,” said Dominic DeNunzio, Senior Investment Manager at NBIM. “These factors—alongside improving office fundamentals—were central to our decision last year to increase our investment in the building.”

Strategically positioned one block from Union Station, 25 Mass boasts premier connectivity and a strong in-place tenancy, anchored by Google’s 100,000-square-foot offices. General Motors, American Iron & Steel Institute and National Cable Telecommunications Association also lease space at the property. Select remaining availability ranges from a boutique suite to a 24,750-square-foot concourse space, offering tailored flexibility within a Class A framework.

About Newmark
Newmark Group, Inc. (Nasdaq: NMRK), together with its subsidiaries (“Newmark”), is a world leader in commercial real estate, seamlessly powering every phase of the property life cycle. Newmark’s comprehensive suite of services and products is uniquely tailored to each client, from owners to occupiers, investors to founders, and startups to blue-chip companies. Combining the platform’s global reach with market intelligence in both established and emerging property markets, Newmark provides superior service to clients across the industry spectrum. For the twelve months ended December 31, 2024, Newmark generated revenues of over $2.7 billion. As of December 31, 2024, Newmark and our business partners together operated from approximately 170 offices with more than 8,000 professionals across four continents. To learn more, visit nmrk.com or follow @newmark.

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