If you live in Boston, it’s very obvious the city is changing. Major new developments have allowed various parts of the city to emerge. Boston is now attracting major companies and retail developers in different Boston-area neighborhoods.

These are the six neighborhoods with massive new developments underway….

Back Bay

PELLI CLARKE PELLI/BOSTON PROPERTIES

The under-construction Four Seasons Hotel & Private Residences is set to become Boston’s tallest new building in nearly 40 years (since 200 Clarendon, basically).

The 740-foot tower is part of a larger complex that will include 180 condos and a Four Seasons hotel. Incredibly, the condo portion has already garnered some record breaking sales, including a pending $40,000,000 deal, which would break the Boston sales record.

The neighborhood is also scheduled to get an abundance of towers above and around Back Bay Station. That development comes with the promise of improvements to the transit hub itself.

Seaport District

ELKUS MANFREDI

The Seaport Square development is driving much of the change in the Seaport District.

The 23-acre project is still under development—The 12.5 acres currently under construction is slated to include 3,200 residential units, innovation incubation space totaling 2.9 million square feet, a hotel of up to 500,000 square feet, and civic space.

Then there’s the recently announced hotel across from the Boston Convention & Exhibition Center. It will have more than 1,000 rooms, which is more than all of the new hotels being built or recently opened in Cambridge combined. It will also have the second-biggest ballroom in Boston.

And last but CERTAINLY not least, the Lawn on D changes.

Waterfront

CBT ARCHITECTS

The Boston Planning & Development Agency gave approval March 2nd on a rezoning of 42 acres of waterfront in downtown Boston, including 22 acres of filled tidelands.

The decision appeared to clear the way for a major skyscraper in place of the Boston Harbor Garage, although those plans are still up in the air.

The project would likely mean a 1,000-foot extension of the Rose Kennedy Greenway to the water’s edge and other streetscape and parkland improvements.

Then there’s the possibility of what has been described as a “jaw dropping” new park on and around the shuttered Northern Avenue Bridge.

South End

NATIONAL DEVELOPMENT

An incredible rush of new development in the South End’s northeastern reaches drastically changing the neighborhood.

Together, the fresh projects are adding thousands of condos and apartments, never mind hundreds of thousands of square feet of retail (and eventually tens of thousands of residents).

Then there’s the possible redevelopment of the 5.6-acre site of the shuttered Boston Flower Exchange. The site’s owner wants to convert it into 1.6 million square feet of lab and office buildings to create a commercial hub to rival Kendall Square, the Longwood Medical area, and the Seaport.

Finally, the state and a private developer plan to open a new park this June—underneath the southeast expressway.

Fort Point

Rendering of GE HQGENSLER

General Electric broke ground this week on its 2.4-acre headquarters in Fort Point—a project massive enough by itself to transform the small neighborhood.

The three-building complex, which is scheduled to open by the end of 2018, will involve GE spending about $200 million to renovate two existing warehouses on Necco Court and to construct a 12-story addition with a dramatic solar veil.

The corporate campus will include “maker space” for employees, tech startups, students (both university and high school), and locals; a community work lounge; space for conclaves and presentations, never mind ample laboratories; and an employee cafeteria.

Kendall Square

DAVID L. RYAN/THE GLOBE

Longtime presence M.I.T. is driving much of the change in Kendall. The university recently paid the federal government a mint to take over the 14-acre Volpe transit center site, and then floated plans for what would be the tallest building in Cambridge at 500 feet.

Plans also call for at least 1,400 housing units and 1.7 million square feet of offices and research space at the Volpe site.

The university, too, plans to build several buildings south of Main Street, including a massive 28 floor dorm.