If you’ve walked past 100 Gold Street in the Financial District lately, you might want to take a good look at the aging government building. It won’t be there much longer.
Mayor Zohran Kwame Mamdani just announced a massive update to the city’s housing plan. The 1960s-era office building is officially being transformed into nearly 4,000 new homes.
This is one of the single largest infusions of residential development in Lower Manhattan in decades.
A win for affordable housing
The updated proposal increases the original unit count by roughly 300 homes. Spearheaded by GFP Real Estate and designed by CetraRuddy Architects, the massive mixed-use complex will feature three new high-rise towers. Early renderings show the tallest tower could reach an impressive 1,000 feet high.

The most impactful detail? 1,000 of these units will be permanently affordable, rent-stabilized homes.
To put that scale into perspective, this project alone will deliver nearly double the number of affordable units built in all of Manhattan Community District 1 over the last decade.
Brand new community perks
The redevelopment isn’t just about adding apartments. The 100 Gold Street site will also bring major upgrades to the surrounding neighborhood.
Here is what locals can expect to see in the new complex:
- A brand-new older adult center to replace the existing Hamilton-Madison House facility.
- 40,000 square feet of public open space for the neighborhood to gather and relax.
- A massive 40,000-square-foot publicly accessible fitness center complete with community programming.

Amazingly, this is all happening at no cost to the City. The project utilizes cross-subsidies and the 485-x tax break.
Proceeds from the development will actually fund relocating the city agencies currently operating inside 100 Gold Street to modern office spaces.
The timeline for the new towers
This local housing surge is actually part of a larger neighborhood settlement. The former administration previously agreed to add heavy housing to this district in exchange for dropping affordable development plans at the Elizabeth Street Garden site.
Now, the 100 Gold Street project is officially moving forward. The formal public review process kicks off with a scoping hearing next month.
Environmental reviews will continue through the fall, and the massive development is expected to officially enter the Uniform Land Use Review Procedure (ULURP) in 2027.