Developer Federal Realty’s unfolding mega-project on the banks for the Mystic keeps growing and growing.

A 20-story, 447-unit, bocce-court-containing apartment building called Montaje opened in mid-September 2017. And, in May, Federal filed plans for a 500-unit residential complex with 26,500 square feet of restaurant and retail space on Assembly Row’s so-called Block 8.

There are already several hundred apartments and condos (including Montaje) as well as dozens of stores and restaurants.

And! It’s all amid an Orange Line stop that opened in September 2014—the first new subway stop along the T in a quarter-century.

This 1.87 million-square-foot project under construction above and around North Station is due to include three towers.

The first phase—which developers Boston Properties and TD Garden owner Delaware North hope to have finished before 2019—will include 175,000 square feet of creative office space; 210,000 square feet of retail and restaurant space, including a Star Market and a 15-screen ArcLight Cinema; 64,000 square feet of new space for the sports arena; 10,000 square feet of outdoor space, including a new TD Garden/North Station entrance; and 540 underground parking spaces.

Phase Two is supposed to have a 38-story residential tower with 440 apartments and a 10-story citizenM hotel tower with around 260 rooms.

And Phase Three is supposed to have a 21-story, 525,000-square-foot office tower.

National Real Estate Advisors and HYM Development are overseeing the epic redevelopment of the Government Center Garage right near the Haymarket stop of the Green and Orange lines.

Work officially commenced this past January on the first phase: a 45-story, 486-unit, 480-foot residential tower. The developers announced in July that 118 apartments in this spire would, in fact, be 55 condos—a nod to a growing trend in the Boston housing market wherein rents are kind of plateauing and the city’s condo market remains hot, hot, hot.

Bulfinch Crossing will also include a 43-story, 528-foot, 1 million-square-foot office tower called One Congress.

Houston-based developer Hines is planning a 51-story building atop South Station.

The 862,000-square-foot tower would include 641,000 square feet of office space, 166 condos in 215,000 square feet, 6,000 square feet of retail, and parking for approximately 895 cars.

The project would also involve a 50 percent expansion of South Station’s bus capacity.

Hines has collected key approvals for the mammoth project—it would be one of the tallest towers in New England and would start nine floors above ground—and had said it planned to start construction in 2017.

That looks unlikely, but the plan is still moving ahead.

Developer Boston Properties plans to build three towers of 26, 28, and 34 stories as part of an expansion of Back Bay Station—which includes an Orange Line and commuter-rail stop as well as a stop on Amtrak—and the 165 Dartmouth Street.

The shortest tower would be for offices and the others for approximately 600 residences.

The square-footage would total some 1.26 million square feet; and would include new floors above the station's current concourse for retail such as a grocery store.

The Boston Planning and Development Agency in mid-November signed off on the project—but only after Boston Properties reached a deal with opponents concerned about the shadows it would cast.

The developer will pay $3 million to opponents such as the Old South Church to mitigate the shadows’ impact and a further $3 million to an affordable housing fund that Boston runs.

The Boston Planning and Development Agency signed off in March on this multi-building project totaling 1,928,400 square feet near the Ruggles stop of the Orange Line and commuter rail.

The development, which includes plans for 728 apartments in two buildings, a BJ’s Wholesale Club, and a new Museum of the National Center of Afro-American Artists, will be the biggest in Roxbury perhaps in decades and certainly the biggest since Boston’s modern development boom kicked off post-Great Recession.

Plans for Tremont Crossing stretch back to the middle of the previous decade.

At different points it was supposed to be nearly all offices and offices with a sizable dormitory component.

Developers Elma Lewis Partners and Feldco eventually settled on the current plans.

EDENS, the South Carolina-based shopping-center operator and developer, officially broke ground in August 2016 on the 11-acre development of a site adjacent to its South Bay plaza near the Andrew Square stop.

The project is immense in scope.

It’s due to include five new six-story buildings; 475 apartments; a 130-room hotel; 113,000 square feet of retail, including restaurants; a 12-screen AMC Theatre with Imax and AMC Prime Technology; 1,094 new parking spots; and community space for events such as farmers markets, craft shows, charity drives, and festivals.

The MBTA board voted in early December to approve a plan to plunk as many as 602 apartments atop and around Quincy Center Station.

The Quincy City Council a couple of weeks later, however, approved the same plan, but with a drastically reduced apartment count—300, max, instead of 602.

The plan from Atlantic Development and Bozzuto Development Co. also involves office and retail space as well as upgrades to the station, including a new bus terminal and the restoration of more than 600 parking spaces.

The project would go up in three phases. The first—the upgrades, the new bus terminal, and the first 300 apartments—would be finished by 2023, and the rest by 2031.