Mark Plechaty Pens One Wall Street Case Study in Mann Report

As the year draws to a close, we’re looking back at some of our most exciting projects and press coverage—in case you missed them in the hustle and bustle of 2025. Today we’re sharing a bylined article about the singularly spectacular award-winning One Wall Street as featured in the Mann Report and written by DeSimone Managing Principal Mark Plechaty, PE.

If you’ve ever wondered about the challenges faced, structural engineering ingenuity employed, and innovative approaches implemented in converting this historic, NYC Art Deco icon from an office and banking building into a premier, luxury residences read on at the link below!

From a sustainable structural approach that made possible the addition of six floors atop the building, to the design of a cantilevered structure to create a glass-enclosed, double-height, street-level retail space over the Wall Street MTA subway station, Plechaty reveals the secrets behind the intricate, technically-sophisticated rebirth of One Wall Street—the largest historic office-to-residential conversion to date.

Among the accolades won by One Wall Street are recognitions from ACEC NY, CTBUH, ACI, Retrofit Magazine, SEAoNY, ULI, and most recently the Commercial Observer.

You can check out the full article here.