Alloy Block’s 100 Flatbush Avenue Nears Completion in Downtown Brooklyn

Photo by Michael Young

Exterior work is nearing completion on 100 Flatbush Avenue, a 44-story residential tower in the Alloy Block complex in Downtown Brooklyn. Designed and developed by Alloy Development, the 482-foot-tall, fully electric-powered structure will yield 441 rental units. Of these, 45 will be dedicated to affordable housing, developed in conjunction with the Fifth Avenue Committee. The five-building Alloy Block master plan will encompass 850 units with 200 permanently affordable apartments, 100,000 square feet of Class A office space, 50,000 square feet of retail space, 500 parking spaces for bikes, two Passive House public schools designed by Architecture Research Office, and space for a local cultural institution. Urban Atelier Group is the general contractor for the property, which is bound by Flatbush Avenue to the northeast, Third Avenue to the northwest, and State Street to the southwest.

Construction had recently topped out at the time of our last update in late January. Since then, the crane has been dismantled and the Cladding Concepts-supplied glass curtain wall has finished enclosing the Flatironesque structure up to its top mechanical floor. All that remains to be completed are the podium and the gap in the northeastern elevation where the construction elevator remains attached, as well as a framework adjacent to the rooftop bulkhead that will likely be enclosed in metal paneling.

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Façade work is also getting close to completion on the Khalil Gibran International Academy High School (KGIA) at 380 Schermerhorn Street. The hand-laid gray brick façade and window grid have both made significant progress since our last visit, with only minor sections along the roof and lower floors remaining to be finished. The school will feature a cafeteria, a gymnasium, and a library. A secondary elementary school at 489 State Street will feature a separate gymnasium and an auditorium accessible to the community. These public schools are the city’s first designed to meet Passive House standards.

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Photo by Michael Young

Below is a rendering of the Khalil Gibran International Academy High School and its ground-floor frontage facing Flatbush Avenue Extension.

The Khalil Gibran International Academy High School. Seen on The Alloy Block’s main website

Residential units at 100 Flatbush Avenue will be equipped with induction cooktops, heat pump dryers, and base-building systems including hot water heaters and HVACs designed to make the structure carbon neutral. Homes will occupy floors three through 41 with most of the amenities housed within the multi-story podium. These include a fitness center, flexible workspaces, and an outdoor rooftop swimming pool. The retail space at Alloy Block will feature 20-foot high ceiling spans that face Flatbush Avenue Extension.

Alloy also recently issued a Request for Proposals that seeks to partner with a community solar developer to enroll 100 Flatbush Avenue in projects that will secure a 100-percent local renewable energy supply for the building. The developer is the first to pursue such a program following a recent rule issuance by the New York City Department of Buildings around compliance with Local Law 97, which enabled developers to comply through off-site solar programs.

100 Flatbush Avenue and the two schools are on track to be completed in the first half of 2024. The taller second skyscraper at 80 Flatbush Avenue has yet to begin construction.

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31 Comments on "Alloy Block’s 100 Flatbush Avenue Nears Completion in Downtown Brooklyn"

  1. David in Bushwick | June 8, 2023 at 9:14 am | Reply

    More proof a triangular site can make even somewhat dull designs like this, look good.
    So glad these new projects are all electric.

    • Electric is good. But can NYC’s power grid accommodate all new demands placed on it? Just wondering.

  2. It seems like the Flatiron-Building-inspired craze will never end. Overall, this design is okay. I find it to be a bit plain with it being covered with glass and with it having very minimal massing. The school is nice, though.

    • The flatiron craze? What on earth are you talking about lol are we just not supposed to develop triangular shaped sites?

      • Depending upon the zoning, it is possible that developers could build taller, trapezoidal buildings with smaller footprint but the same square footage, perhaps more if the zoning offers a bonus for public space. Not that there is anything wrong with the triangular buildings.

    • Thomas, what kind of short-sighted uneducated comment is that?!? Did you really expect the developers to waste space and money by building a tower with a less efficient building shape that doesn’t make the full use of the triangular plot of land?

    • There is no “craze.” It’s built of of necessity, economics, and logic, not because of a fad or the need to join a trend 🤦‍♂️🤦‍♂️🤦‍♂️

    • I wasn’t criticizing it all. I was just trying to state how popular these types of designs are, and yes, they are definitely necessary on sites like this. Maybe my remark was a bit vague, but come on. Why do you all always have to argue, whether it’s towards NIMBYs or YIMBYs? Where has the positivity and transparency of the comments on all YIMBY platforms gone?

      • Eric Simmons | June 9, 2023 at 9:14 am | Reply

        True. Thanks for clearing it and giving a thoughtful answer to clarify. This site has always been a great place for architecture enthusiasts, including me since 2015, but a few trolls unfortunately have poisoned and tainted the fun and joy of expressing opinions without getting a rude and cold response. The one I see the most is this guy names Guesser. He’s the most debilitating and never says anything nice to people

        • blsht Eric
          why does everyone automatically think I’m a guy? Says a lot about the architecture enthusiasts.
          “poisoned and tainted the fun and joy of expressing opinions without getting a rude and cold response”
          Give me a break. Making comments on a website gives you fun and joy? Another opinion that doesn’t agree with yours takes away joy and fun from your life? Wow
          I can think of a million ways better to have fun and joy.

          I’m not a troll , but someone who expresses another point of view that YIMBYS don’t like and then the architecture enthusiasts proceed to get personal, not me.

          • Jackie Whittaker | June 11, 2023 at 12:09 am |

            Guessers, I’m assuming you’re also Guesser (idk why you use more than one alias), I know and can smell a drama queen and bad b*tch when I see one. Your level of sass and rudeness reinforces Eric’s comment and Thomas’s grievance where you’ve become a self-perpetuating cycle of the very thing you’re trying to dismiss against all us folks, just sayin

            – Jackie, a bad b*tch myself, but at least I own up to that title and don’t deny it

      • Eric Simmons | June 9, 2023 at 9:25 am | Reply

        Wait a minute, are you the same Thomas that commented on the article of 111 Washington Street recently and got ridiculed by Guesser? I read that and was really shocked by his remark. I thought he sounded very childish and immature for saying that.

        • Yes, that’s me. That wasn’t the first time that Guesser had attacked me, nor anyone else for that matter.

          • Eric Simmons | June 9, 2023 at 5:30 pm |

            Ughh in so sorry to hear that 🤦‍♂️ Best thing to do is not stay silent and let him get away with it. Raise you voice louder than his!

          • Attacked?
            Rallying the YIMBY troops Thomas,
            good job.
            This is a frkin website with comments, that’s all
            Such drama

  3. This building is a winner on many levels.

  4. David : Sent From Heaven. | June 8, 2023 at 9:35 am | Reply

    Two schools are beautiful siblings, with 100 Flatbush Avenue is more likely to beautiful than two schools. The dark color on exterior I think it’s appropriate to choose it as a school, and looking at the tallest building so beautiful in every way only the glass wall that looks extremely delicated: Thanks to Michael Young.

  5. 45 affordable units it will be 200,000+ applicants so sad.

    • That’s because they really don’t want to fix the real affordable housing crisis, who really need it, you will see 100% true affordable housing in the high crime, impoverished, low transit, etc neighborhoods, it’s called NYC HOUSING SEGREGATION

      • It’s also because we don’t really have a federal “big government” housing program anymore. But its exactly what NY and many other cities need: Large scale publically financed affordible housing projects to meet the housing needs that the free market does not and will not address and does it in a manner that avoids mistakes made last century regarding design and integration to the surroundinng neighborhood.

        • it’s also because DeBlasio used the now dead 421A NYS taxpayer subsidy program to allow millionaire developers to build at 130% AMI , instead of building truly affordable housing for low and middle income people at the most 60% AMI
          Developers only care about the bottom line , MAKING MONEY $$$$$$$$$$$$$

  6. Looking forward to the rolling brown outs sky high electric bills as NYC forces all new construction to be eletric rather than natural gas.

    • Dimwitted meaninglessly pessimistic comment

    • Is this a serious comment?

    • Oh my god Chip 😪🙄

    • Christopher J Stephens | June 10, 2023 at 2:59 pm | Reply

      Good to see someone is brave enough to buck groupthink. Utility companies are already warning us about upcoming electricity shortages, but the global warming cultists who brought us to this point don’t want anyone to hear it.

      Building an entire skyscraper without the potential to use clean, cheap natural gas is shortsighted. The users of this building are in for sky-high energy bills in the coming decades. Short-sighted virtue signaling: is it worth it?

  7. Scott Preston | June 8, 2023 at 11:47 am | Reply

    One of the best skyscrapers in downtown Brooklyn and love the sight of it looking north on Flatbush Ave ❤️

  8. Eric Simmons | June 9, 2023 at 9:50 am | Reply

    Lovely photos as usual! Can’t wait to see this done and be paired with 80 Flatbush Avenue!

  9. I’m surprised you guys like this, it’s like a boring LIC glass tower but in triangle form

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