Cambridge, MA

Cambridge’s urban structure is a chain of squares, each functioning as a center. Kendall, Central, Harvard, and Porter line up along Massachusetts Avenue and the Red Line, each with a different mix of institutions, work, commerce, and housing. Their pattern grew from several settlements: Newtowne was founded in 1630, Harvard College followed in 1636, and the town took the name Cambridge in 1638. Old Cambridge, Cambridgeport, and East Cambridge developed separately before incorporation as one city in 1846. This compact arrangement keeps the centers close together while preserving recognizable street plans and daily roles. Harvard is centered in Old Cambridge around Harvard Square, while MIT occupies much of the Charles River frontage east of Massachusetts Avenue. Kendall Square, once a manufacturing district, has become a dense concentration of biotechnology, research, technology, laboratories, offices, and newer housing.

Central Square combines City Hall, small businesses, restaurants, music venues, offices, transit, and surrounding residential streets. Porter Square marks the northern end of the sequence with Red Line and commuter-rail service; Kendall forms the research-heavy eastern end near Boston. University buildings, private laboratories, historic houses, apartment blocks, shops, and civic spaces are interwoven along ordinary streets, especially between the river and the Red Line. Open land often performs a civic or infrastructural job. Fresh Pond is the terminal reservoir in Cambridge’s drinking-water system, surrounded by protected reservation land used for walking and environmental programs. Along the southern edge, the Charles River Reservation creates a continuous public frontage beside MIT and connects across bridges to Boston.

Cambridge Common serves as both an active neighborhood park and a historic landscape beside Harvard Square, where Continental soldiers camped during the Siege of Boston. George Washington used the Vassall house on Brattle Street as his headquarters in 1775 and 1776, placing another Revolutionary site within Old Cambridge’s residential fabric. These spaces differ sharply: a protected water-supply landscape, a metropolitan riverbank, and a common embedded in the colonial center. Each offers relief from the dense street grid while remaining connected to how Cambridge functions. Housing rules changed materially in February 2025, when Cambridge began allowing multifamily housing in every residential neighborhood except open-space districts. The baseline generally permits four stories, with six possible on qualifying inclusionary sites; historic review, tree protection, building codes, and environmental standards still apply.

The amendment removed the city’s remaining single-family-only residential zoning and extended the same basic permission across established neighborhoods. As of July 2026, the change expanded what owners could propose; actual construction still depended on individual applications and approvals. Its physical effects will arrive parcel by parcel through ordinary permitting. Cambridge now pairs that broader permission with its established transit geography: five Red Line stations, Green Line service at Lechmere, commuter rail at Porter, and buses and bicycle routes linking the squares. The new rule is most concrete on ordinary residential streets, where a small multifamily building can now be considered citywide.