Anagram Turtle Bay Nears Completion at 300 East 50th Street In Midtown East, Manhattan
By: Max Gillespie
300 East 50th Street. Designed by BKSK Architects
Construction is nearing completion on Anagram Turtle Bay, a 23-story residential tower at 300 East 50th Street in Midtown East, Manhattan. Designed by BKSK Architects and developed by MAG Partners in partnership with Global Holdings and Safanad, the 275-foot-tall building is the fourth property in MAG’s Anagram collection. It yields 194 rental units, 30 percent of which have been designated as affordable. The property is located at the southeast corner of East 50th Street and Second Avenue.
300 East 50th Street. Designed by BKSK Architects
The building spans 170,000 square feet, including 4,888 square feet of ground-floor retail space. Its façade is composed of gray brick and floor-to-ceiling windows.
Transit nearby Anagram Turtle Bay includes the E, M, and 6 trains at Lexington Avenue-53rd Street and 51st Street stations.
Anagram Turtle Bay’s completion will closely follow that of MAG’s other residential project, Mabel, at 335 Eighth Avenue in Chelsea. Also developed with Safanad, Mabel will deliver 190 units, 30 percent of which are affordable.
Meet Mabel: MAG Partners unveils renderings of new residential project in Chelsea
By: Staff, 4.10.25
In early April 2025, MAG Partners, the real estate developer founded by MaryAnne Gilmartin, unveiled new renderings of Mabel, its latest residential project. The seven-story building, rises from a prominent site at 335 Eighth Avenue at the corner of West 26th Street. The red-brick building brings a context-sensitive design by COOKFOX to its Chelsea neighborhood, but its
all-electric infrastructure will be instrumental in its quest for LEED Gold and Passive House certification.
MAG Partners developed Mabel in conjunction with Safanad and Met Life Investment Management under the Affordable NY program. Thirty percent of the 188 units have been designated affordable for low- and middle-income New Yorkers.
Details are not yet available about the apartments’ interiors, but first renderings show large operable picture windows that fill the spaces with natural light. Residential amenities are set to include a fitness center, a library, a media lounge, a coworking lounge with private workspaces, and a dining area with catering kitchen. Additionally, in accordance with COOKFOX’s
commitment to biophilic design principles, Mabel will be topped with outdoor roof gardens with grilling and dining areas.
Mabel is named in honor of Mabel Osgood Wright, a New York City writer and early conservationist, in the spirit of MAG Partners naming its residential buildings in honor of historic women. It is located around the corner from Ruby, MAG Partners’ first residential project named in honor of fashion designer/Harlem Renaissance figure Ruby Bailey. (No word yet on who the namesake for 300 East 50th Street will be, but this MAG Partners-helmed project is estimated to open this summer.)
Mabel is also located in excellent proximity to Hudson Yards, Madison Square Garden, the High Line, Fashion Institute of Technology, and many acclaimed Chelsea restaurants. Nearby public transportation options include the 1, C, and E trains at 23rd Street, and it is also situated down the street from Moynihan Train Hall.
Mabel rose as the replacement of an aging building at the limited-equity Penn South cooperative located between Eighth and Ninth Avenues and spanning West 23rd to 29th Streets. Under the terms of Mabel’s ground lease, MAG Partners will pay rent directly to Penn South in a move that keeps the complex affordable for current and future residents.
Moreover, as the old building housed a Gristedes supermarket in its retail space, the developer agreed to include a replacement supermarket in the new building. As such, Mabel’s ground-floor commercial space will include a grocery store operated by Lidl, a high-quality European-based grocery store.
Exterior work completed at Mabel as of March 2025 (CityRealty)
Construction is nearing completion on Mabel, a seven-story residential building at 335 Eighth Avenue in Chelsea, Manhattan. Designed by COOKFOX Architects and developed by MAG Partners under the Affordable NY Program in partnership with Safanad and MetLife Investment Management, the structure yields 188 rental units. The property is located at the corner of Eighth Avenue and West 26th Street.
Rendering of 335 Eighth Avenue. Designed by COOKFOX
Amenities include a fitness center, coworking lounge with private workspaces, a library, media lounge, dining area with catering kitchen, and a rooftop deck with landscaping, outdoor dining areas, and electric grills. The property is designed to meet Passive House and LEED Gold certification standards.
Rendering of 335 Eighth Avenue. Designed by COOKFOX
Mabel was commissioned by Penn South, a local affordable housing cooperative, and will include ground-floor commercial space anchored by Lidl, the European grocery chain. Thirty percent of the building’s units will be reserved for low- and middle-income New Yorkers.
Rendering of 335 Eighth Avenue. Designed by DBOX
The closest subways from Mabel are the 1 train at the 28th Street station on Seventh Avenue and the C and E trains at the 23rd Street station on Eighth Avenue. The development is also within walking distance of Penn Station.
