Photo by Yuki Iwamura-Pool/Getty Images)
Last night, Zohran Mamdani, a 33-year-old Democratic Socialist, secured a shocking victory in New York City’s Democratic mayoral primary, beating out former governor Andrew Cuomo.
Mamdani is running on a sweeping housing platform that has struck a chord with young and working-class voters as well as the city’s immigrant communities—many of whom have borne the brunt of New York City’s affordability crisis. These residents were hit hard by the COVID-19 pandemic-era whiplash: first, when rents dropped and vacancies surged as wealthier New Yorkers left the city; and again, when prices skyrocketed as they returned.
The result is a city in acute distress. The vacancy rate for rental housing has dropped to 1.4%, (the lowest since 1968) and the median asking rent is $3,397—up 5.6% from a year ago and 18.1% from five years ago, according to Realtor.com® data.
“These numbers are unfortunately not surprising at all given the fundamentals of supply and demand,” says Jake Krimmel, senior economist at Realtor.com. “Not only is New York one of the most in-demand real estate markets in the world, but it is also one that is critically undersupplied.”
That lack of supply is having dire consequences. As of April 2025, homelessness in New York had reached levels not seen since the Great Depression. Nearly 70% of those in city shelters are families including over 37,000 children, according to the Coalition for the Homeless.
Mamdani’s response is as bold as it is unconventional for New York. But can his sweeping platform actually deliver? Or will his big promises crumble under their own weight?
What’s in Zohran Mamdani’s housing plan?
Mamdani’s response is one of the most ambitious public housing proposals the city has seen in generations. His plan includes:
- A $100 billion investment over 10 years
- Construction of 200,000 new publicly subsidized, rent-stabilized units
- A multiyear rent freeze on rent-stabilized apartments
- Doubling capital funding for NYC Housing Authority (NYCHA) to prioritize public housing preservation
- Fast-track status for any 100% affordable housing projects
Where past administrations have relied on private developers using tax breaks, rezonings, and incentive programs, Mamdani wants to flip the script. His plan puts the public sector in the lead, prioritizing affordable housing for New York families earning under $70,000 a year.
It’s a dramatic departure from the market-first strategies that have defined city housing policy for decades. Whether that departure represents a long-overdue course correction or a costly overreach is now the central question.
Could a rent freeze help or hurt?
During his campaign, Mamdani ran a series of ads promising to freeze rents on stabilized apartments every year he’s in office. On the heels of Mayor Eric Adams’ hikes for these units—totaling a 9% increase over three years—it’s a politically potent pledge, especially for renters whose incomes haven’t kept pace with rising costs.
For economists and housing experts, the picture is more complicated. Some fear that freezing the rent can contribute to rising prices by incentivizing more families to stay put, locking up inventory. But others say this is an outsized reaction.
“Rent freezes [are] applied to rent stabilized units, and that’s not new construction units,” notes Yonah Freemark, principal research associate at the Urban Institute. “So in other words, putting in a rent freeze should not affect the overall rates of housing construction, because it does not affect newly constructed housing units.”
That distinction is critical. Undersupply of units is a major contributor to the affordability crisis today.
“Between 2010 and 2023, the number of housing units grew by 10%, while employment grew by 25% (even despite the Great Recession),” says Krimmel. “Put another way, for every 100 new jobs created … just 40 new housing unit were built.”
Any drag on new units risks worsening a crisis that already has the city at a breaking point. But Freemark says that’s not the trade-off with a rent-freeze.
“The potential negative of rent stabilization,” he says, “is if it’s too strong, it might result in reduced investment in those units in terms of improved quality … but the magnitude of that change in quality is not well documented in the research.”
Ultimately, Mamdani’s rent freeze may not break the housing market—but whether it meaningfully protects renters without degrading housing quality will depend on how it’s implemented, enforced, and funded.
Can NYC really build 200,000 public homes in 10 years?
To understand the scale of Mamdani’s housing promise, it helps to look backward. Between 2010 and 2020, New York City added just over 185,000 multifamily units in buildings with four or more homes, according to the NYU Furman Center. Only about 30% of those were affordable to low-income households (those earning under 80% of the area median income).
Mamdani’s plan calls for something even more ambitious: 200,000 “deeply affordable,” publicly subsidized, rent-stabilized units in just 10 years. Not only would that dramatically accelerate the pace of affordable production the city has managed in the past, it would do so by making the public sector—not private developers—the primary engine of construction.
“It’s not something that has been clearly attempted by other cities in the United States in the last few decades,” says Freemark. “But what we do know very clearly is that directly, publicly subsidized affordable housing is going to provide affordability for the people who are able to live in it.”
That impact, however, may not ripple far beyond the people lucky enough to land a unit. For citywide affordability to improve, the hope is that a public building spree would also trigger broader market effects.
“If Mamdani is able to set off a construction boom of not just publicly subsidized housing, but also market-based housing, then there could be a decline in overall housing costs,” Freemark adds.
But that’s a big “if.”
Building 200,000 affordable units would require substantial political will, money, labor, and land, plus enough permitting and planning capacity to keep projects moving. And then there’s the question of speed. City agencies like NYCHA and HPD would need to scale rapidly in order to meet this timeline.
That kind of buildup—both in units and in government capacity—would mark a dramatic shift for a city that’s spent decades outsourcing affordability to the private market. Mamdani is betting that if the city builds it—and staffs it—they will come.
Proof of concept: Has this worked anywhere else?
Mamdani’s plan to massively expand New York’s stock of publicly subsidized housing may be bold by U.S. standards, but it isn’t without international precedent. Around the world, a growing number of cities are reconsidering the limits of relying solely on private development to meet housing needs and looking instead to the public sector to close the affordability gap.
Freemark points to Paris.
“There was a decision made in the mid-2010s to substantially increase public investment in subsidized housing, and that resulted in about 30,000 publicly subsidized housing units being undertaken each year,” he says. “That made a very substantial change in terms of people’s access to affordable housing.”
In other words, large-scale public investment didn’t just work—it scaled. Paris isn’t alone.
“We’re seeing this globally,” Freemark says, pointing to London, where a major campaign goal of Mayor Sadiq Khan’s was to increase affordable housing.
“What we’re seeing in New York City, I think, is part of a global trend,” Freemark says, “that acknowledges that essentially investing solely in private market housing is not going to be adequate to address the affordable housing needs of people throughout urban areas like New York City.”
Still, translating that momentum into local results won’t be easy. New York’s housing agencies have been chronically underfunded for decades. Mamdani’s plan may be inspired by what’s worked elsewhere, but executing it here will mean overcoming constraints unique to the city’s zoning, labor market, and fractured political terrain.
Ambitious, necessary, or naive?
Whether Mamdani’s housing plan is visionary or unrealistic may depend less on the blueprint and more on the levers he’ll actually be able to pull. While a future Mayor Mamdani would have direct control over city agencies like Housing Preservation and Development (HPD) and NYCHA and the ability to shape the city’s capital budget, many of his most transformative proposals will require cooperation from Albany. That includes expanding rent stabilization laws, lifting the city’s debt ceiling, and unlocking more bond financing for affordable housing.
Even if all of that goes according to plan, building 200,000 new homes will require navigating labor shortages and a complex web of permitting, environmental review, and community board resistance.
Still, supporters argue that New York is long overdue for a radical reset, and that Mamdani’s plan is simply meeting the moment. For many tenants, the private market hasn’t just failed to deliver; it’s pushed them to the edge.
“The private market and the public subsidized market are addressing different needs,” says Freemark. “Investing in subsidized housing is not going to result in less support or less investment in market-rate housing.”
In fact, a dual-track approach may be the key.
“If the conditions are right,” Freemark adds, “you want a very large increase in subsidized housing construction to serve people at the lower portion of the income range, but also create the conditions for market investors to come in and build at the higher income range. We can walk and chew gum at the same time in New York City.”
Getting there, however, will require more than slogans. It will take execution. Mamdani’s platform may be feasible in theory—but only if the city can act with unusual speed, clarity, and coordination.
In a housing crisis this severe, that might be the boldest proposal of all.