News release

King Street Properties Announces Full Occupancy at 75 Hayden Street

Dicerna Pharmaceuticals, Voyager Therapeutics, Frequency Therapeutics and Integral Health will occupy all of the new 214,440 sq. ft. life sciences center in Lexington, Mass.

September 09, 2020

BOSTON, September 9, 2020JLL and King Street Properties, the largest private owner/operator of life science real estate in Greater Boston, announced today that they have finalized leasing commitments with four firms to occupy 100% of King Street Properties’ new life sciences facility being developed at 75 Hayden Avenue in Lexington, MA. Construction of the new 214,440 sq. ft., four-story Class A laboratory and R&D center began in 2018. Weeks away from delivery, the new facility will anchor the four-building Hayden Research Campus, which is the epicenter of Greater Boston’s core suburban life science cluster located directly off Route 2 and Route 95/128. Hayden Research Campus is owned in a joint venture between King Street Properties and Healthpeak Properties, a leading healthcare REIT.

“King Street Properties and our partners at Healthpeak are delighted that these firms have decided to join the community of leading life science organizations who call the Hayden Research Campus home,” said Michael DiMinico, King Street Properties Executive Director. “The new facilities at 75 Hayden Avenue will provide each firm with robust lab infrastructure, a wealth of tenant amenities and ease of access both to and from Cambridge, Boston and the core suburban markets. We are excited to welcome Frequency, Voyager, and Integral Health into the King Street portfolio and continue our great relationship with Dicerna Pharmaceuticals.”

“Expanding to 75 Hayden Avenue provides us with the opportunity to grow in a first-class campus environment,” said Jim Weissman, Chief Operating Officer and Executive Vice President of Dicerna Pharmaceuticals, Inc. “In close proximity to our existing office and lab space, 75 Hayden provides the added infrastructure to support our growing business, facilitates the collaborative work culture that has become a hallmark of Dicerna, and allows us to continue the long-term, productive relationship with King Street.”

The new 75 Hayden building is the cornerstone of the Hayden Research Campus, a leading center for science and research on 37 acres located at the junction of Routes 2 and I-95/Route 128 in Lexington. Lexington is part of the Massachusetts “Super Cluster,” which has become the headquarters of dozens of drug development companies that have created thousands of biotech and pharmaceutical jobs over the past decade. The campus features a wealth of tenant amenities, including a full-service cafeteria, a separate full-service café, outdoor seating areas and fire pit, a fully equipped fitness center with lockers and showers, indoor bike storage, and abundant surface parking in addition to two covered parking garages.

JLL Managing Directors Ben Coffin, Don Domoretsky and Tucker Hansen represented building owners King Street Properties and Healthpeak Properties in the transactions with each of the firms. T3 Advisors CEO Roy Hirshland and Senior Principal Jeremy Hood represented Dicerna Pharmaceuticals in the 91,728 square foot lease; Frequency Therapeutics was represented by Colliers International Executive Vice Presidents Greg Klemmer and Evan Gallagher in its 61,307 square foot lease; Voyager Therapeutics was represented by CBRE Vice Chairman Jon Varholak and Executive Vice President Eric Smith in the 32,152 square foot lease; and Integral Health was represented by CBRE First Vice President Alex Plaistead and Vice Chairman Greg Lucas in its 29,623 square foot lease.

About JLL

JLL (NYSE: JLL) is a leading professional services firm that specializes in real estate and investment management. JLL shapes the future of real estate for a better world by using the most advanced technology to create rewarding opportunities, amazing spaces and sustainable real estate solutions for our clients, our people and our communities. JLL is a Fortune 500 company with annual revenue of $18.0 billion in 2019, operations in over 80 countries and a global workforce of nearly 93,000 as of June 30, 2020. JLL is the brand name, and a registered trademark, of Jones Lang LaSalle Incorporated. For further information, visit

About King Street Properties

King Street Properties is the largest privately-held and locally-based owner of life science real estate in the Greater Boston area. With over 2 million square feet of lab space under ownership and management in Cambridge and the core suburban laboratory markets, King Street is highly experienced in the operation of best-in-class multi-tenant laboratory buildings. King Street offers a hands-on approach while drawing upon the large-company experience of its team and has the flexibility to deliver customized space solutions to a wide-range of innovators. Please visit for additional information.

About Healthpeak

Healthpeak Properties, Inc. is a diversified real estate investment trust (REIT) that owns and develops healthcare real estate for Life Science, Senior Housing and Medical Office tenants. Healthpeak has had a long history – starting as Health Care Property Investors in 1985 with an IPO on the NYSE, growing into a leading healthcare REIT, and selected to the S&P 500 index in 2008.

Now, as Healthpeak, with over $20 billion of owned real estate, is well positioned to create consistent long-term growth opportunities for investors. For more information regarding Healthpeak Properties, visit