Trophy Seaport office tower trades for $435M as institutional capital returns to Boston's premier waterfront district

JLL led the sales efforts for One Marina Park Drive, underscoring investor confidence in irreplaceable Boston assets

Key Takeaways

• Historic transaction volume: The $435 million sale of One Marina Park Drive represents one of the most significant office transactions of 2026, signalling renewed institutional appetite for best-in-class, assets in supply-constrained, premier micro-markets
• Institutional capital returns to Boston: Oxford Properties' acquisition underscores growing investor confidence in Boston's innovation-driven office market, particularly for irreplaceable waterfront assets in the Seaport
• Competitive process yields premium pricing: JLL's marketing campaign generated exceptional buyer interest, reflecting strong demand for trophy assets delivering locked-in cash flow, substantial rent growth potential and insurmountable barriers to entry

BOSTON, Aug. 24, 2026 /PRNewswire/ -- JLL's Capital Markets group announced today that it has completed the $435 million sale of One Marina Park Drive, a 494,938-square-foot, Tier 1 office tower in Boston's Seaport District.

JLL represented the seller, Clarion Partners, in the sale of the asset to Oxford Properties. The sale represents one of 2026's most impactful office transactions and underscores institutional capital's appetite for well-located, Tier 1 assets as well as a return of institutional capital to the Boston office market. The transaction is also the largest pure-play office sale in Boston in the last five years.

One Marina Park Drive delivered in 2010 as the anchor commercial asset of The Fallon Company's $4 billion Fan Pier development. The 18-story tower is 99% leased to a high-credit tenant roster. With LEED Gold and WiredScore Platinum certifications, 375 below-grade parking spaces and floor-to-ceiling harbor views, the asset benefits from insurmountable barriers to entry in a submarket that has achieved 22% Tier 1 rent growth since 2019.

The property occupies one of Boston's last direct waterfront sites within Fan Pier in the Seaport, adjacent to Vertex Pharmaceuticals' 1.1 million-square-foot global headquarters. Within a two-block radius of One Marina Park Drive there are more than 35 dining options, 1,200 luxury housing units, 50 retail stores, hotels and museums. The property is also within walking distance of South Station, providing Red Line MBTA service and commuter rail service to the Greater Boston area, and the MBTA Commuter Ferry service at Rowes Wharf.

The Seaport continues to rank as a top-three nationally performing office micro-market, with 98% Tier 1 occupancy and Boston ranked as the second-hardest U.S. market to build, requiring a 48% rent gap to justify new speculative supply.

JLL's Capital Markets Investment Sales and Advisory team representing the seller was led by Executive Managing Directors Coleman Benedict and Riaz Cassum, Managing Directors Scott Carpenter and Patrick Shields, Associate Chris Barry and Analyst David Mega.

"This transaction validates what we've been seeing across premier office submarkets. Institutional capital is concentrating on irreplaceable trophy assets in supply-constrained, top-performing markets, underwriting to the data around outperformance and net effective rent growth," said Carpenter. "One Marina Park Drive offered exactly what strategic buyers are pursuing in 2026: durable in-place cash flow with a track record of outperformance, meaningful embedded mark-to-market upside, and a waterfront position with no new construction in the pipeline. The competitive tension throughout the process reaffirms that best-in-class office fundamentals continue to command premium pricing."

JLL Capital Markets is a full-service global provider of capital solutions for real estate investors and occupiers. The group's in-depth local market and global investor knowledge delivers the best-in-class solutions for clients, including investment sales and advisory, debt advisory, M&A and corporate finance, loan sales, equity & fund placement, net lease, derivative advisory and energy & infrastructure advisory. JLL Capital Markets has more than 3,000 specialists worldwide with offices in nearly 50 countries.

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About JLL 
JLL (NYSE:JLL) is a leading global commercial real estate services and investment management company with annual revenue of $26.1 billion, operations in over 80 countries and a global workforce of more than 112,000 as of June 30, 2026. For over 200 years, clients have trusted JLL, a Fortune 500® company, to help them confidently buy, build, occupy, manage and invest across a variety of industries and property types, including office, industrial, hotel, multi-family, retail and data center properties. Driven by our purpose to shape the future of real estate for a better world, we help our clients, people and communities SEE A BRIGHTER WAY. Powered by rich global datasets and leading technology capabilities, we provide coordinated, end-to-end delivery of real estate services for a broad range of global clients who represent a wide variety of industries. Through LaSalle Investment Management, we invest for clients on a global basis in both private assets and publicly traded real estate securities. For further information, visit jll.com.

Contact: Kristen Murphy, JLL Director, Public Relations
Phone: +1 617 543 4873
Email: [email protected]

SOURCE JLL