Assembly Square Marketplace
Assembly Square Marketplace is a retail and mixed-use destination in Somerville, Massachusetts, redeveloped from a former Ford assembly plant and enclosed shopping mall.
Last updated August 25, 2026
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Overview
Assembly Square Marketplace is a retail-centered development in the Assembly Square district of Somerville, Massachusetts, across the Mystic River from Boston. The property occupies land whose industrial history shaped the identity of the surrounding neighborhood. Ford Motor Company built an automobile assembly plant there in 1926, and the site later hosted a supermarket distribution operation before being converted into a shopping mall. The Ford plant closed in 1958, contributing to a long period of industrial decline in the district. The original Assembly Square Mall opened around 1980 and contained approximately 322,000 square feet of retail space. Its initial anchor tenants were Jordan Marsh and Kmart, supported by smaller shops, a food court, a movie theater, and an office building. When Macy's acquired the Jordan Marsh chain, the department store at Assembly Square closed in 1997. Building 19 subsequently occupied the former department-store space, while the enclosed mall increasingly lost tenants and functioned largely through a small number of remaining large-format stores. The property entered a new phase after Federal Realty Investment Trust acquired the former mall and associated Assembly Square parcels in 2005. Federal Realty gutted and reconfigured the former enclosed shopping-center buildings, completing the Assembly Square Marketplace redevelopment in the mid-2000s. The resulting format was more open and retail-park oriented, integrated with a broader urban-village plan rather than relying exclusively on an enclosed mall. The development was planned as part of a much larger mixed-use transformation involving retail, housing, offices, research and development space, hospitality, entertainment, parks, waterfront access, and public transportation. Assembly Square's redevelopment was closely connected to the creation of Assembly Row. Construction on the broader mixed-use project began in 2012, and major portions opened in 2014. The district gained a new Orange Line station, a main street, residential buildings, restaurants, shops, offices, a hotel, a cinema, public open space, and waterfront improvements. The Marketplace therefore operates less as a standalone conventional mall than as one retail component of a transit-served mixed-use neighborhood. Occupancy has changed over time as national chains entered, closed, or were replaced. Examples associated with the redevelopment include Home Depot, Burlington, Trader Joe's, Xfinity, Nike, Le Creuset, Brooks Brothers, Chico's, J.P. Licks, AMC Theatres, and the Legoland Discovery Centre. Office occupants in the wider Assembly Square development have included SmartBear Software, Puma's North American headquarters, and administrative operations of Mass General Brigham. The property is owned and led by Federal Realty Investment Trust, while individual stores, restaurants, entertainment venues, and offices operate under their own brands. The Marketplace's present positioning is convenience-oriented, destination retail within a larger mixed-use and entertainment environment. Its competitive appeal comes from highway access, the MBTA Orange Line, proximity to Boston, a concentration of restaurants and stores, residential and office activity, and connections to parks and the Mystic River waterfront. It should not be treated as a payment-processing or financial-services brand; it is a physical retail and real-estate destination.
History
The land now associated with Assembly Square Marketplace lies along the west bank of the Mystic River in Somerville, Massachusetts. Before industrialization, the low-lying area consisted largely of tidal marsh and wetlands. Transportation shaped its later development: river traffic, the Middlesex Canal, railroads, and roads connected Somerville with Boston and the surrounding region. Ford Motor Company established an automobile assembly plant on the site in 1926. The plant helped give Assembly Square its name and made the district a significant regional employment center. The facility closed in 1958 after Ford changed its manufacturing strategy and the Edsel-related business failed to meet expectations. A supermarket distribution operation subsequently used part of the former plant site, but that operation moved away in 1976. The departure of both industrial users left large vacant areas and contributed to the district's physical and economic decline. The City of Somerville pursued redevelopment through urban-renewal planning. The former industrial property was converted into Assembly Square Mall, which opened around 1980 with Jordan Marsh and Kmart as its principal anchors. The enclosed mall also included smaller stores, a food court, a cinema, offices, and new access roads. Its performance weakened as retail patterns changed and suburban development expanded. Macy's replaced Jordan Marsh's corporate ownership but closed the local store in 1997. Building 19 later occupied the former department-store location, while much of the mall was eventually closed or emptied. A Home Depot opened nearby in 1992, introducing a major big-box retailer to the district. The area's future became the subject of substantial public debate. The Mystic View Task Force advocated a walkable mixed-use district with housing, offices, open space, and employment rather than a development dominated by large-format retail. In 1999, IKEA acquired waterfront parcels and proposed a store, but community opposition and legal challenges delayed the project. The Somerville Redevelopment Authority and the city developed a broader mixed-use vision in the early 2000s. The plan called for a district combining retail, offices, residences, restaurants, a hotel, entertainment, parks, and public access to the river. Federal Realty Investment Trust acquired the former Assembly Square Mall and additional properties in 2005. It then redeveloped the mall into Assembly Square Marketplace and worked with the city and IKEA on a revised plan that moved the proposed IKEA use inland, preserving more waterfront land for pedestrian-oriented mixed use and public space. Federal Realty's redevelopment was coordinated with Assembly Row, a larger 45-acre mixed-use project. Construction began in 2012, and major portions opened in 2014. New residential buildings, retail streets, restaurants, offices, public parks, waterfront paths, a cinema, a hotel, and the Assembly Orange Line station changed the character of the former industrial district. IKEA ultimately withdrew from the project in 2012, and Federal Realty later acquired additional land, consolidating ownership of much of Assembly Square. Retail occupancy has continued to evolve. Sports Authority was replaced by Burlington after the former chain's 2016 failure, A.C. Moore was replaced by Trader Joe's in 2017, and Xfinity joined the tenant mix in 2019. The closing of Kmart in November 2019 removed the final original anchor from the former mall. Today, Assembly Square Marketplace functions as part of a larger destination district rather than as an isolated enclosed shopping center. Its identity is based on retail, dining, entertainment, offices, residences, public transportation, and access to the Mystic River waterfront.
- 2019
Kmart closes
[1]The final original anchor of the former shopping mall closed in November.
- 2014
Major Assembly Row facilities open
[1]Major elements of the mixed-use district opened, including retail, residences, entertainment, public space, and the Assembly Orange Line station.
- 2012
Assembly Row construction begins
[1]Construction started on residential buildings, a new main street, and transportation infrastructure within the broader mixed-use redevelopment.
- 2006
Assembly Square Marketplace redevelopment is completed
[1]The former enclosed mall was gutted and reconfigured into the Assembly Square Marketplace retail format.
- 2005
Federal Realty acquires the former mall
[1]Federal Realty Investment Trust purchased the defunct mall and related Assembly Square properties.
- 1992
Home Depot arrives
[1]A Home Depot opened on an adjacent parcel, adding a major-format retailer to the district.
- 1980
Assembly Square Mall opens
[1]The former industrial site was converted into an enclosed shopping mall anchored by Jordan Marsh and Kmart.
- 1958
Ford plant closes
[1]The Ford facility closed as the company altered its manufacturing strategy and the Edsel division failed.
- 1926
Ford assembly plant opens
[1]Ford Motor Company opened an automobile assembly plant on the site, providing the origin of the Assembly Square name.
Products and positioning
A transit-accessible, highway-adjacent retail and entertainment destination embedded within the larger Assembly Row mixed-use district, combining shopping, dining, family attractions, offices, housing, and waterfront public space.
Retail park and shopping center · 2006
Assembly Square Marketplace
The Marketplace is a reconfigured retail destination occupying the former Assembly Square Mall site. It provides space for stores, restaurants, services, and entertainment venues and is integrated with the wider Assembly Row mixed-use district.
Family entertainment · 2014
Legoland Discovery Centre Boston
An indoor attraction based on LEGO construction and play, the Legoland Discovery Centre added a family-oriented entertainment use to the Assembly Square retail and mixed-use environment.
Brand decisions
2009
Reconfigure the IKEA and waterfront development planStrategyBackground
IKEA's proposed waterfront store had faced community opposition, while city planning favored a walkable mixed-use district with public waterfront access.
Action taken
Federal Realty and IKEA exchanged parcels, moving the proposed IKEA site inland and preserving waterfront areas for mixed-use development and public space.
Aftermath
The land swap consolidated the broader Assembly Row concept, although IKEA later withdrew from the project in 2012.
2005
Convert the enclosed mall into a retail-park formatStrategyBackground
The former enclosed mall had lost much of its tenant base and no longer fit the city's emerging mixed-use vision for Assembly Square.
Action taken
After acquiring the property, Federal Realty gutted and reconfigured the mall, completing a more open retail format known as Assembly Square Marketplace.
Aftermath
The Marketplace became the retail foundation for the subsequent Assembly Row redevelopment, which added housing, offices, entertainment, transit, parks, and waterfront amenities.
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