But 388 Bridge’s lofty reign won’t last long. AvalonBay Communities broke ground in August on a 57-story residential building nearby at 100 Willoughby Street. It is to have 826 rental units and amenities including a gym, a playroom, a rooftop lounge with Manhattan skyline views, an indoor dog spa and an outdoor dog run with separate areas for large and small dogs. Rental prices have not been set, said Martin Piazzola, a senior vice president of AvalonBay, “but if we were leasing today, I would expect rents to be in the $55- to $60-a-square-foot range.”

Anticipating the challenger, publicists for 388 Bridge are quick to point out that their turbine-topped tower will offer condos in addition to rentals, and thus will remain the tallest building you can own a piece of in Brooklyn.

Not as tall but still a skyline-changer, the Dermot Company’s 66 Rockwell, a 42-story glass tower near the Brooklyn Academy of Music, will also offer impressive views from a rooftop deck. Of its 326 apartments, 20 percent will be below market rate. Leasing is expected to begin this month, with studios starting at $2,400 a month, one-bedrooms at $3,300 and two-bedrooms at $4,930.

And there is more to come. Next door to H & M, United American Land has applied for permits to develop 120 luxury rental lofts with 15-foot ceilings at 248 Duffield Street, an 1893 Romanesque Revival structure known as the Offerman Building that has had a succession of retail tenants. Also, steel is going up for the first of two residential towers at the mixed-use City Point development, on the site of the former Albee Square Mall and bounded by the Fulton Mall, Gold and Willoughby Streets and Flatbush Avenue.

The project, by Acadia Realty Trust, Curbcut Urban Partners and Washington Square Partners, will include 680 rental apartments, 125 of them for moderate- and low-income residents. And in early 2014, Douglas Steiner, a developer and the chairman of Steiner Studios, expects to begin construction at 333 Schermerhorn Street on the Hub, a 52-story tower with about 750 rentals.

Mordechai Werde, an associate broker at Douglas Elliman who specializes in new development in Brooklyn, said Downtown Brooklyn was “definitely coming into its own,” adding, “People see it as a much more residential neighborhood.”