Excavation Underway for 844-Foot Skyscraper at 343 Madison Avenue in Midtown East, Manhattan

343 Madison Avenue. Rendering courtesy of Volley STudio.343 Madison Avenue. Rendering courtesy of Volley STudio.

At number ten on our year-end construction countdown of the tallest projects in New York is 343 Madison Avenue, an 844-foot-tall commercial skyscraper in Midtown East, Manhattan. Designed by Kohn Pedersen Fox and developed by BXP, the 49-story structure will yield 950,000 square feet of office space and a collection of tenant amenities. The property is located between East 44th and 45th Streets.

A team of excavators is working across the southern end of the site, which has been dug well below street level. The property was formerly occupied by a 15-story building that housed the headquarters of the Metropolitan Transportation Authority (MTA).

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

A section of the reinforced concrete substructure has begun formation at the northern corner of the property, where an access point to Grand Central Madison will be located. Only this part of the project is above street level and was built with a steel framework over the last several months. Crews were seen installing parts of the façade above the ground floor behind the wraparound sidewalk fencing.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

343 Madison Avenue. Photo by Michael Young.

The main rendering shows an aerial perspective of the building’s main western profile facing Madison Avenue. The building rises with a rectangular massing with setbacks around the one- and two-third points of its height, each topped with landscaped terraces. The façade will be composed of a glass curtain wall with a framework of vertical metals fins. The skyscraper will culminate in an illuminated crown and a bulkhead extension of the egress core that runs up the full height of the rear eastern profile.

343 Madison Avenue is being engineered with a fully electric, zero-carbon design and has earned several sustainability certifications, including LEED Platinum and WELL Core. The project is also targeting WiredScore Platinum and Energy Star 85+ certifications.

The property is located in close proximity to Grand Central Terminal, offering access to the 4, 5, 6, 7, and Shuttle train to Times Square, as well as the Metro-North Railroad and Long Island Rail Road at Grand Central Madison.

343 Madison Avenue’s anticipated completion date is slated for summer 2029, as noted on site.

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21 Comments on "Excavation Underway for 844-Foot Skyscraper at 343 Madison Avenue in Midtown East, Manhattan"

  1. David of Flushing | December 22, 2025 at 9:09 am | Reply

    I am waiting for the Roosevelt Hotel to be replaced. These developments are the result of the up zoning change. I wish the former Pan Am building would be down zoned.

  2. I like it, amazing the turnaround in the office sector!St

  3. Kahlil Bellinger | December 22, 2025 at 9:55 am | Reply

    On an unrelated topic I wonder when they are going to move Madison Square Garden and convert the current one to a train station hub, or if the deal got squashed. I hope not. All of New York teams have a New ungraded stadium to play in with exception of our Basketball and Hockey team. It’s about time we upgraded.

    • It all depends on Penn Station. A proposal in March (called the Grand Plan) suggested moving MSG to the site of the former Hotel Pennsylvania, while an older proposal left MSG in the same location with some significant upgrades.

      • David of Flushing | December 22, 2025 at 1:41 pm | Reply

        MSG is two blocks in diameter. THe Hotel Pennsylvania site is only half that. There are numerous areas for litigation. Amtrak owns the station, but I understand that the Dolans own the ground and they have no intention of moving after renovating the place. You would have to look to the West Side train yard used by the LIRR or perhaps the one in Queens near Queensboro Plaza or the subway yard in Flushing Meadows. In any event I will not live long enough to see any new station.

        • The proposal referred to as the “Grand Penn,” so typo in my first post, states that, In exchange for moving, the arena’s owner, James Dolan, could secure a permanent operating license, which has been temporary for several years. Experts like former MTA transit chief Andy Byford have noted that a “normal” single city block is insufficient for a modern arena. The Grand Penn plan overcomes this by effectively merging the hotel site with surrounding land to create the necessary space.

          So, there you have it!

    • What are talking about. Dolan spent almost $1 Billion upgrading MSG just a few years ago! It is a top rate facility.

      • OneNYersOpinion | December 22, 2025 at 1:43 pm | Reply

        MSG is the MAJOR impediment to improving service and utilization at Penn Station. Tear down MSG(4) — Dolan can rebuild across 7th Ave, now that the lot is empty. It’d likely serve the Knicks & Rangers well to get away from the present site — It’s not as if it’s been a home of Champions (or even “Almost Champions”). But ALL of NYC will benefit from MSG(4) being no more — Incl Construction firms who will gleefully tear it down, and build MSG(5) across 7th Ave.

  4. More office space with Ai eliminating jobs . Seems risky.

    • Your AI comments seem annoying. Like these companies have no ability to plan? Get real.

    • New York is growing and is in need of more Class A office space.

      • One Vanderbilt
        270 Park Avenue
        350 Park Avenue
        30 Hudson Yards
        70 Hudson Yards
        570 Fifth Avenue
        One World Trade Center
        Three World Trade Center
        Four World Trade Center
        Seven World Trade Center
        Disney HQ
        Google HQ

        All Class A office properties that are nearly/fully leased, RP.

  5. David in Bushwick | December 22, 2025 at 11:53 am | Reply

    Oh joy, another glass box infill. Thank you, Santa.

  6. The 7 train has become the backbone of NYC’s new development, linking Hudson Yards, Times Square, Grand Central, Long Island City, and the Hard Rock casino and NYCFC’s Etihad Park soccer stadium along one direct line.

    • David of Flushing | December 22, 2025 at 1:48 pm | Reply

      The #7 train began as a trolley service from Grand Central to LIC. It was then extended westward to 5th Ave. and Times Square and now to 34th St. In Queens it was hooked up with the Astoria Line. The #7 train was called the “cornfield line” as it passed through farms in the rural Queens of the early 20th century. Horticulture was the main business of Flushing well into the 20th century.

  7. The 7 train has become the backbone of NYC’s new development, linking Hudson Yards, Times Square, Grand Central, Long Island City, and the Hard Rock casino and NYCFC’s Etihad Park soccer stadium along one direct line.

  8. I couldn’t AGREE MORE W/ THE MSG RE-DESIGN & RELOCATION!!!, I’ve been reimagining a completely transformative UPGRADE to the blight of MSG for 3 decades now,(a hideous vestige of horrid 60’s “architecture”, like Penn Station w/ it’s dilapidated 130 year old crumbling tunnels, choke holding the vitality of nyc for what seems like an ETERNITY now), China would have rebuilt these critical infrastructure hubs, along w/ Port Authority Bus Terminal, probably with new beautiful suspension bridges & park promenades, etc, so expeditiously & cost effectively, it would leave our bureaucratic boondoggle heads spinning, but let’s give $40 Billion dollars to Argentina & everywhere else EXCEPT our own critical domestic needs, however this new bldg seems copacetic to me👍

  9. This building is just quirky enough to be interesting..

  10. I hate that mish-mash dark alley vibe – the northwest corner of Grand Central – and now
    they add this to make it even darker. Oh well.

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