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We have proven that sustainability creates lasting value.
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We believe that well-crafted buildings can improve people’s lives.
© Nic Lehoux
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We build for and with communities.
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We draw inspiration from nature.
© Chris Payne/Esto
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We prioritize lasting partnerships.

Our Company

MAG Partners is a woman-owned, urban real estate company with decades of experience developing impactful, iconic, large-scale projects.

Led by MaryAnne Gilmartin, together the MAG Partners team has successfully designed, built and operated over seven million square feet of office, residential and mixed-use projects, including over 2,000 units of housing, with a total value of over $4.5 billion. Our current multi-million square foot development portfolio includes two sophisticated multifamily rental buildings in Chelsea and a major district-wide entitlement project on six acres of the Long Island City waterfront.

We believe and have proven that principles of beauty, diversity and sustainability create great places with lasting value for our partners, investors and communities.

Our Projects

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241 West 28th Street

241 West 28th Street is a through-block, thoughtfully designed, multifamily project being developed by MAG Partners in the highly coveted Chelsea neighborhood. Construction commenced in November 2020 and the building will include 480 apartments with 30 percent built as affordable under the Affordable NY program. Designed by celebrated architects COOKFOX Architects, the exterior of the building will be contextual masonry inspired by the rich historic architectural fabric of the neighborhood, while the residences will incorporate biophilic design strategies that connect its residents to nature. The development will include approximately 8,500 square feet of ground floor retail.

Architect

COOKFOX

Construction Manager

Urban Atelier Group

Capital Partners

Atalaya
Qualitas
Safanad

Type

Residential
Retail
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335 8th Avenue

MAG Partners was selected by Penn South, an affordable housing cooperative in Chelsea, to develop 335 Eight Avenue into a mixed income apartment building with ground floor commercial space, including a grocery store.  The new 200-unit building will be developed under the Affordable NY Program with thirty percent of its units reserved for low-and-middle income New Yorkers.  The building will commence construction in 2022.   The redevelopment will replace the aging existing building with a modern, contextual 7-story building that is about 200,000 square feet, designed by renowned local architects COOKFOX.  At the heart of Penn South, the design seeks to bridge the historical character of Chelsea, mid-century visions of urban living and contemporary aspirations for a new building that supports sustainable and healthy living.

Architect

COOKFOX

Type

Residential
Retail
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44-02 Vernon Boulevard

MAG Partners is the development partner for RiverLinc, a six-acre site located on the Long Island City waterfront with stunning views of the Manhattan skyline. MAG Partners joined together with the neighboring property owners, TF Cornerstone, Plaxall and Simon Baron Development, under the leadership of the New York City government to work with the community on a collaborative process for a full 28 acres of underutilized private and public land to bring jobs, green energy, resilient waterfront open space, affordable housing and arts and community space to the waterfront. Conceived of a mixed-use development with 21st century office space and multifamily rental housing, the public process for a zoning change is currently on hold.

Architect

SHoP

Type

Mixed-use

Our Record

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New York Times

The New York Times Building is an office building in midtown Manhattan developed in partnership with The New York Times Company. The building was designed by Pritzker Prize-winning Italian architect Renzo Piano and was a driving force behind the redevelopment of 42nd Street.

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New York by Gehry

When New York by Gehry was completed in 2011, this 896 unit building—dubbed “Frank Gehry’s Love Letter to New York”—was the tallest residential building in the Western Hemisphere. The building was a catalyst for the transformation of Lower Manhattan into a 24/7 mixed use community.

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Tata Innovation Center

The Tata Innovation Center is a first-of-its-kind office space for tech innovation. Designed by acclaimed architects Weiss/Manfredi and located on the cutting-edge Cornell Tech campus on Roosevelt Island, the building brings together industry and academia to spur innovation in the digital economy.

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Barclays Center

Barclays Center, a state-of-the-art sports and entertainment venue in the heart of Brooklyn, is the centerpiece of the Pacific Park Brooklyn master development. A creative collaboration with music legend JAY-Z, the arena was designed by SHoP Architects and is credited with revitalizing the surrounding area and bringing professional sports back to Brooklyn.

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Pacific Park Brooklyn

Pacific Park Brooklyn is an eight million square foot master plan development that includes 14 mixed-income residential buildings, commercial, and retail space. When completed, Pacific Park Brooklyn—groundbreaking in its scale and ambition for the borough—will span eight acres and cover the Vanderbilt Rail Yard. Pacific Park’s first four residential buildings were designed by SHoP and COOKFOX Architects and opened in 2017.

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Metrotech Center

MetroTech Center is a $1.5 billion, 7.6 million square foot commercial, academic, and high technology complex on a ten-block, sixteen-acre site that was developed, leased and operated by members of the MAG Partners team. Critical to kickstarting Brooklyn’s revival, MetroTech transformed a dilapidated downtown into New York’s third-largest business district, bringing more than 22,000 jobs to the neighborhood.

Our Expertise

MAG Partners pairs institutional know-how and experience with a creative and nimble approach to deal-making.

Acquisitions & CAPITAL markets

MAG Partners utilizes its creativity and deep relationships to source and structure unique and valuable projects. Grounded in comprehensive real estate knowledge and experience, the MAG Partners team pairs expert project evaluation skills, from site evaluation and zoning analysis to political risk assessment, with access to project structuring and underwriting capacity, sourced from long-term relationships with institutional investors and lenders. In November 2020 MAG Partners formed a non-exclusive joint venture with the real estate investor Safanad to pursue urban real estate projects, primarily in the New York area. The venture will act as a general partner as it acquires properties and sites for both ground-up development and active management.

Portfolio & Asset Management

MAG Partners is comprised of a team of highly seasoned asset managers whose experience includes operating over 20M square feet of commercial, residential, retail and hospitality space at Forest City Realty Trust and Mack-Cali. The team’s expertise includes the full range of management capabilities, from budgeting and financial analysis to leasing, marketing, and property management. MAG Partners’ unique approach focuses on creating exceptional relationships with all constituencies – from tenants and vendors to investors and lenders – leading to long-term partnerships with the parties critical for maximizing the value of each asset in the portfolio.

Development & Construction

MAG Partners has successfully designed and built over seven million square feet of office, residential and mixed-use projects, including over 2,000 units of housing, with a total value of over $4.5 billion. The team brings a comprehensive, end-to-end skill set to development, enabling MAG Partners to manage projects from ideation to steady state management and exit. The MAG Partners team has spearheaded some of New York City’s most transformative masterplan developments and takes pride in its human-centric approach to transforming neighborhoods and making markets.

Public-Private Development

The MAG Partners team has decades of experience executing successful public-private partnerships and bringing to life transformational masterplans. Members of the team have been relied upon by New York City and State governments to produce development and infrastructure projects that deliver benefits to the community, including high levels of MWBE participation and quality permanent and construction jobs, with a special emphasis on local hiring. MAG Partners has a dedicated and experienced in-house lobbying capability, giving MAG Partners access to policymakers in New York City and Albany – a unique advantage for New York projects. A core capability of the MAG Partners team is its expertise in developing community support and achieving successful public approvals for projects. As experts in New York City Uniform Land Use Review Procedure (ULURP) and New York State General Project Plans (GPP), MAG Partners has vast experience entitling projects and navigating complicated regulatory environments.

Our Team

MaryAnne Gilmartin

MaryAnne Gilmartin

Founder & Chief Executive Officer, MAG Partners

MaryAnne Gilmartin

Founder & Chief Executive Officer, MAG Partners

MaryAnne Gilmartin is the Founder and Chief Executive Officer of MAG Partners, a New York-based real estate development company she founded in 2020.  Most recently, MaryAnne also served as interim Chief Executive Officer and Chair of the Board of Directors of Mack-Cali Realty Corporation.

Prior to founding MAG Partners, MaryAnne was CEO of L&L MAG. After a successful two-year partnership with L&L, MaryAnne spun out of L&L MAG to launch her own firm, MAG Partners. The company is currently developing a 480-unit residential building in Chelsea, designed by acclaimed architect COOKFOX.

MaryAnne previously served as President and CEO of Forest City Ratner Companies, where she oversaw a period of game-changing ground-up development and managed its multimillion square foot residential, commercial and retail portfolio.

In her tenure at Forest City Ratner Companies, MaryAnne spearheaded the development of some of the most high-profile real estate projects in New York City. She led the efforts to build Barclays Center, the state-of-the-art sports and entertainment venue and the centerpiece of the $4.9 billion, 22-acre mixed-use Pacific Park Brooklyn development. She also oversaw the development of The New York Times Building, designed by world-renowned architect Renzo Piano; New York by Gehry, designed by award-winning architect Frank Gehry; and the Tata Innovation Center at Cornell Tech, a new office building that is a first-of-its-kind space for tech innovation, designed by Weiss/Manfredi on Roosevelt Island.

MaryAnne is a civic leader in the New York metropolitan area, serving as Chair Emeritus of the Downtown Brooklyn Partnership, member of the Executive Committee of The Brooklyn Academy of Music, member of the New York Public Radio Board of Trustees, member of the Executive Committee and Board of Governors of The Real Estate Board of New York, and part of the Industry Advisory Board of the MS Real Estate Development Program at Columbia University. In addition to her civic and industry board service, MaryAnne was appointed a member of the board of directors of the global investment banking firm Jefferies Group LLC in 2014.

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Susi Yu

Susi Yu

Principal, Head of Development

Susi Yu

Principal, Head of Development

Susi Yu is a Principal and the Head of Development at MAG Partners, responsible for overseeing and executing the company’s development investment strategy.

MAG Partners spun out of a successful two-year partnership with the L&L Holding Company founders, called L&L MAG. During her tenure at L&L MAG, Susi oversaw the acquisition and development of 480-unit multi-family rental project in Chelsea.

Previously, Susi served as Executive Vice President of Development for Forest City Ratner Companies, leading the Residential Development team on execution of Pacific Park Brooklyn, the $4.9 billion, 22-acre mixed-use development in the heart of Brooklyn. At Forest City, Susi also oversaw the development of large scale, mixed-use urban projects including New York by Gehry, a 896-unit residential building designed by Frank Gehry. Susi started at Forest City in 2001 and worked there until 2018, except for a 20-month stint from 2013–2015 with the Howard Hughes Corporation as Senior Vice President of Development.

Trained as an architect at the University of Virginia’s School of Architecture, Susi previously worked for ten years in that field, most recently as a Project Architect for Robert A.M. Stern. She is a graduate of Columbia University’s Master of Science in Real Estate Development Program and is a registered architect in New York State. Susi emigrated from Seoul, Korea to Richmond, Virginia at the age of ten. Susi serves on an advisory board of the Goldman Family and is a director of Apple Bank.

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Jeffrey A. Rosen

Jeffrey A. Rosen

Principal

Jeffrey A. Rosen

Principal

Jeffrey Rosen is a Principal at MAG Partners and oversees development and capital markets activities for the company.

MAG Partners spun out of a successful two-year partnership with the L&L Holding Company founders, called L&L MAG. At L&L MAG, Jeffrey was responsible for sourcing $92M in joint venture equity and oversaw the closing of a $173M construction facility for a 480-unit multi-family rental project in Chelsea.

Prior to joining L&L MAG, Jeffrey spent 12 years at Forest City Realty Trust, most recently as Executive Director of Greenland Forest City Partners, a joint venture partnership between Forest City Realty Trust and Greenland USA, a subsidiary of Shanghai-based Greenland Group. In that role, Mr. Rosen was responsible for the overall execution and strategic direction of Pacific Park Brooklyn, the $4.9 billion, 22-acre mixed-use development in the heart of Brooklyn.

Jeffrey also served as Senior Vice President for Finance and Capital Markets at Forest City Ratner Companies where he was responsible for the origination and structuring of construction and permanent debt, private equity transactions and joint venture partnerships.

Prior to Forest City Ratner Companies, Jeffrey worked for PricewaterhouseCoopers in the Management Consulting Services division, advising Fortune 500 clients on enterprise-wide process improvement initiatives.

Jeffrey is a graduate of Cornell University and received his MBA from New York University.

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Ashley Cotton

Ashley Cotton

Principal

Ashley Cotton

Principal

Ashley Cotton is a Principal at MAG Partners and oversees government affairs, communications, and marketing for the company.

MAG Partners spun out of a successful two-year partnership with the L&L Holding Company founders, called L&L MAG. As Managing Director for L&L MAG, Ashley lead public affairs for both companies including the 10 million square foot commercial real estate operating and development portfolio. She led the positioning and launch of Terminal Warehouse, a 1.2 million square foot historic warehouse to office conversion in Chelsea and TSX Broadway, a first-of-its-kind full-building promotional platform in the heart of Times Square.

Previously, Ashley served as Executive Vice President at Forest City Ratner Companies, managing all external relations for the company. In that role she oversaw media and community relations for complex development projects such as Pacific Park Brooklyn, Barclays Center and the Tata Innovation Center at Cornell Tech, as well as directing the marketing strategy for the company’s multimillion square foot residential, commercial and retail portfolio.

Prior to Forest City, Ashley served as a Senior Policy Advisor to New York City Mayor Michael Bloomberg in the Office of the Deputy Mayor for Economic Development. She also served as a senior aide to now Governor Andrew M. Cuomo on his successful race for Attorney General and in that government office.

Ashley is a graduate of Bowdoin College and received her Master in Public Administration from Columbia University. A Brooklyn resident, she serves on the board of BRIC Arts Media.

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Danielle West

Danielle West

Vice President of Corporate Operations

Danielle West

Vice President of Corporate Operations

Danielle West is Vice President of Corporate Operations at MAG Partners and oversees general operations for the firm, as well as providing executive support to the CEO and other staff.

MAG Partners spun out of a successful two-year partnership with the L&L Holding Company founders, called L&L MAG where Danielle managed all operations. Previously, Danielle served as Executive Assistant to the President and CEO at Forest City Ratner Companies where she managed all of the President and CEO’s scheduling, meeting preparation, travel and expenses, fundraised on behalf of the President and CEO, and provided critical support in internal and external communications, staff coordination, and speaking engagements and appearances.

Prior to joining Forest City Ratner Companies, Danielle served as Senior Project Manager at Kinsella Media in Washington, DC where she oversaw dozens of nationwide media programs for litigation settlements, and gained international expertise implementing programs.

In addition, after graduate school, Danielle used her policy and organizational skills to oversee research publications and support legal and government relations teams at a prominent national nonprofit in Washington, DC.

Danielle is a graduate of Centenary College of Louisiana and received her MPP from The College of William and Mary. Danielle is also a certified Project Management Professional, has her aPHR certification, and is a Notary Public in the state of New York.

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Han Xu

Han Xu

Vice President of Development

Han Xu

Vice President of Development

Han Xu is Vice President of Development and currently oversees the day-to-day pre-development of two residential projects in Manhattan.

Han was previously a Project Manager at Forest City Ratner Companies where she oversaw the development and leasing of 38 Sixth Ave, a 300 unit affordable residential rental, and the pre-development of 615 Dean, 280 unit condo. Prior to Forest City, Han was with Howard Hughes Corporation as a Development Manager working on the South Street Seaport masterplan as well as various acquisitions opportunities.

 

Han holds a Masters of Science in Real Estate Development from Columbia University and a Bachelor of Architectural Studies from the University of Waterloo in Canada. Prior to working in development, Han worked for seven years in residential architecture in London, New York and Toronto.

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Standish Lee

Standish Lee

Assistant Vice President of Development

Standish Lee

Assistant Vice President of Development

Stan is currently overseeing the development and construction of 241 W. 28th Street for MAG Partners.

MAG Partners spun out of a successful two-year partnership with the L&L Holding Company founders, called L&L MAG. Prior to L&L MAG, Standish was with Triton Construction as a Senior Pre-construction Manager. Her projects with Triton included: 80 Flatbush, a mixed use tower and school; 550 Clinton, a 29-story rental; 11 Hoyt Street, a 52-story condo; 1185 Broadway, a 40-story 164-key hotel; 412 W. 15th Street, a 21-story 128,577 GSF commercial core and shell project; and 413-435 W. 14th Street, a 99,834 GSF commercial gut renovation.  Combined, these projects had approximate contract values totaling over one billion dollars.

Prior to Triton, Standish was with Hunter Roberts Construction Group as a Project Manager on the Manhattan West Southwest Residential Tower, a 63-story, 799,800 SF, 844-unit rental and Project Manager/Assistant Project Manager on 50 West Street, a 64-story, 523,643 GSF, 191-unit condo.

Standish has also acted as a research assistant to Sanford Kwinter for Harvard University. Standish received a B.Arch from Cooper Union in 2011 with a Minor in History & Society. Standish is a Registered Architect and holds a LEED AP BD+C certification. She is a Patron at the Metropolitan Opera and a volunteer in fundraising efforts at the Cooper Union.

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Adam Freindlich

Adam Freindlich

Assistant Vice President

Adam Freindlich

Assistant Vice President

Adam Freindlich is an Assistant Vice President at MAG Partners and supports development and capital markets activities at the company.

Prior to joining MAG partners, Adam spent four years at Mack-Cali Realty Corporation, most recently as Associate of Strategic Initiatives. In that role, Adam facilitated potential capital opportunities, conducted strategic planning and administered the due diligence process on inbound offers. Adam has assisted in over $1 billion of acquisitions and ownership consolidations, as well as over $1 billion of financings.

Adam is a graduate of the Wharton School of Business at the University of Pennsylvania, majoring in Economics with concentrations in Real Estate and Finance.

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Our News

MAG Partners to redevelop Chelsea corner
June 3, 2021
The Real Deal

MAG Partners to redevelop Chelsea corner

By: Lois Weiss – MaryAnne Gilmartin’s development firm struck a deal to redevelop a corner site on Eighth Avenue in Chelsea.  MAG Partners signed a long-term lease with a…
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