The Tenant Activist At The Center Of Mamdani’s Housing Gamble

NEW YORK — Cea Weaver, the firebrand tenant activist turned top aide to Mayor Zohran Mamdani, joined frustrated renters in May outside a stretch of dilapidated brick buildings in East Harlem.

The tenants had gathered to hang a banner off their fire escape that blared, in large red and blue letters: “Buyers, Back Off Our Block.”

Their warning — issued ahead of a pending foreclosure auction — was aimed at the sort of real estate investor they feared would scoop up buildings like theirs, only to squeeze the last drops of cash from them, leading to further deterioration.

Weaver’s presence underscored a significant shift: In the perennial fight between New York City’s landlords and tenants, the new mayor was squarely in the latter camp, and there was no better illustration of this fact than Weaver herself. She had spent years dueling and often beating powerful real estate interests, her sights fixed on getting buildings off a “hamster wheel” of speculation and neglect. Now, under the new democratic socialist mayor, she had a chance to put the city’s power behind that effort.

“Tenants in buildings like these can come together to try to put their buildings on a path to stable and different ownership,” Weaver told tenant leaders in May. “The city is proud to stand with you all today as you embark on that fight.”

Mamdani elevated Weaver to the newly empowered tenant protection post on his first day in office, and she quickly became one of his most controversial appointments. A fierce backlash over old, since-deleted tweets erupted almost immediately. Weaver, long considered a radical by her critics, had posted some decidedly radical takes: a call to seize private property, a desire to elect more communists and the belief that homeownership is a “weapon of white supremacy.” She almost instantly shot to notoriety within the right-leaning media world, within days drawing tabloid reporters to her home in the quickly gentrifying Crown Heights section of Brooklyn and a rebuke from senior officials in the Trump administration. (She expressed regret over the tweets.)

Nine months later, Weaver continues to provoke alarm among critics. But she also commands considerable influence on how Mamdani approaches some of the most pressing and contentious housing questions before him. She is widely observed to have the mayor’s ear, with an imprint on policy matters that goes beyond her modest perch leading a seven-person office, according to interviews with numerous people familiar with the new administration’s internal dynamics. The philosophy she’s long espoused appears throughout Mamdani’s housing agenda: taking on negligent landlords, using the levers of government to activate tenants and gradually reshaping the conditions at play in the real estate market.

Like Mamdani, who leaned on her for policy advice long before January, she has deep ties to the democratic socialist movement that elected him. She’s long voiced ambitions for creating a vastly different housing system — with more buildings directly regulated or even owned by government, and fewer at the mercy of a volatile, speculative private real estate market. But she also has a keen understanding of the myriad constraints Mamdani will face in trying to change the status quo, including the strained city budget. She is often seen as an emblem of the socialist mayor’s most extreme inclinations, but she’s also proven willing to embrace strategies that have put her at odds with some on the left — like working with private developers to address the housing shortage.

Her role and influence offer a window into how much socialists can advance their ideological project on an issue — housing — that has been a central driver of their electoral gains. And her approach could provide a blueprint for other left-run cities seeking to protect tenants and boost affordability — or end up as a cautionary tale.

“I really believe that the public sector can be an excellent steward of affordable housing, and that tenants have a really critical role to play in protecting and enhancing that public stewardship,” Weaver said in an interview.

She’s already credited with one of New York’s most consequential housing realignments: the sweeping transformation of the state's rent law in 2019. As the only staff organizer for a broad tenant coalition, she managed to outmaneuver a deep-pocketed landlord lobby that had long dominated the state Capitol — or as one former city official described it: the industry’s “Waterloo.” The changes made it much more difficult to raise rents across the city’s 1 million rent-stabilized apartments and virtually impossible to take them out of rent regulation (a common practice before these reforms).

That record has earned Weaver begrudging respect even from some of her chief opponents.

“She took on some of the quote-unquote most powerful entities with very limited resources and organized for drastic change,” said Jay Martin, a longtime landlord lobbyist who has since moved into consulting. “I don’t think anyone can say that isn’t impressive.”

To Martin and others, Weaver nonetheless symbolizes the administration’s worst impulses: overly ideological, impractical, hostile to private enterprise. Landlords look to buildings that are falling apart — like the East Harlem cluster — and see poor conditions as the bed that Weaver herself made. The reforms she championed, they argue, have produced a deepening crisis across rent-stabilized buildings — one that will only get worse with the rent freeze Mamdani pledged on the campaign trail and secured this past June.

“The mayor defers to [Weaver’s] instincts over how to placate tenant concerns, and that informs every single decision that comes out of City Hall policy-wise,” Martin said. Specifically on the subject of rent-regulated housing, Martin described her as wielding the same amount of power as a deputy mayor.

On the other side, the tenant movement Weaver led until January is buoyed by her influence. Its ambitions go far beyond a rent freeze: It wants to wrest control of buildings from negligent landlords. It wants to “decommodify” them. And it wants to tamp down on speculative investments that have long been a defining feature of New York real estate.

“What landlords see as an impending crisis of financial distress in rent-stabilized housing is a once-in-a-generation opportunity to shift the balance of power in the city — if we seize it,” Sumathy Kumar, the new leader of the tenant coalition, wrote in a July op-ed with fellow activist Tracy Rosenthal. “Wielding majoritarian power in our buildings, at City Hall, and at the state house, we can reclaim thousands of homes from the private market.”

City Hall appears to share some of the movement’s impulses, and Weaver has long held that the failures of a profit-motivated private sector can open up the opportunity for a bolstered public sector role. But it is an exceedingly difficult strategy to scale, especially at a time when the city is facing chronic budget deficits that risk imperiling other pieces of Mamdani’s ambitious, costly agenda.

Dueling narratives

One contradiction at the heart of Weaver’s job is that New York City tenants already benefit from some of the most extensive renter protections in the country, but are still navigating the housing market from an inherent position of weakness: There aren’t enough available apartments relative to the number of people seeking them, particularly at affordable prices.

In East Harlem, across the 887-unit portfolio formerly owned by investor Emerald Equities, most tenants are rent-stabilized. As such, their rents are relatively affordable, and now guaranteed to stay flat for up to two years with the rent freeze. These tenants have the right to annual lease renewals, and can even pass apartments onto their children. But they’re also dealing with pests, leaks, broken plumbing, and endless heat and hot water issues. A retaining wall collapsed behind the buildings this year. In one particularly decrepit vacant unit, tenants found a gaping hole in the ceiling and pigeon carcasses strewn around the floor.

“I’ve thought about moving, but I can’t afford it,” said Cara Polte, 24, who pays around $1,900 for a two-bedroom apartment on East 103rd Street.

Financial distress is a growing problem in rent-stabilized housing: Property values for many buildings have cratered and more are falling into foreclosure. The delinquency rate for loans tied to older New York City apartment buildings, which comprise much of the rent-stabilized stock, reached 11.5 percent in 2025 — up from 3.7 percent two years earlier, according to Trepp, a real estate analytics firm. Increasingly, this distress is showing up in the physical condition of the buildings. But where industry groups argue rent law changes are needed to allow greater private investment, Weaver’s role hinges on the idea that a more responsive and aggressive public sector can itself root out many of these problems.

Her seven-person tenant protection office, which has a budget for four additional hires, has worked to ramp up enforcement and penalties against landlords for housing violations. It has looked at how the city can speed up response times to address these complaints. It has sought to use City Hall’s muscle, alongside possible rule changes, to push owners to recognize and negotiate with tenant unions. And it has worked to identify portfolios where the city can use existing legal mechanisms to take properties from negligent landlords and steer them toward owners it deems more responsible, including possibly tenants themselves.

Before assuming her City Hall role, Weaver even floated the prospect of the city purchasing buildings directly and retaining ownership of them long-term — a controversial idea that would diverge from decades of policy orthodoxy, which has largely bent toward greater reliance on the private sector.

“If a landlord is not able to follow the law, then they should not be a landlord of that property,” Mamdani said at an August press conference on housing enforcement, flanked by Weaver and other senior officials.

The question before them is how far this strategy can go. There are plenty of skeptics who warn the fundamental problem is that rents remain too low to cover building expenses, which have spiked in recent years.

Rafael Cestero, a former city housing commissioner who now leads the Community Preservation Corporation, is one of several experts who have voiced urgent, increasingly dire concerns about rent-stabilized buildings.

“Without some ability to stabilize and grow [rental] revenues, it's going to be very hard to figure out how those buildings stabilize and survive over the long run,” Cestero said.

Weaver argues tenants can only pay so much in rent. And the administration is attempting various strategies to bring down landlord costs. But more buildings falling into poor condition without an off ramp presents a thorny situation for the mayor who ran on freezing rents. For Weaver, it could become an indictment of the project she has spent her career working toward.

She began organizing tenants more than a decade ago in an entirely different market. At the time, real estate investors were making enormous financial bets on rent-stabilized buildings based on the assumption they could eventually deregulate them — a strategy well-worn by 2019, when the rent law reforms essentially ended this practice. In the decades leading up to those state changes, however, landlords were able to take hundreds of thousands of units out of regulation, and purchase prices of buildings were rising rapidly based on this potential.

“There were perverse incentives baked into the system that encouraged speculation, displacement, and a loss of affordability,” Weaver said. The root causes of much of the distress lie in that frenzied speculation, she argues, and the loans that supported it.

The buildings in East Harlem were a “poster child” for this type of risky lending, Weaver says. Emerald took on significant debt when it bought the properties for some $350 million in 2016, but the owner eventually defaulted on those loans and the portfolio fell into bankruptcy a few years ago. The 39-building portfolio has been in limbo since then, temporarily under the purview of a court-appointed receiver with many of the long-term tenant complaints going unresolved.

Breaking this cycle isn’t easy.

Tenant leaders have been pushing for their buildings to go to the local El Barrio Community Land Trust, a nonprofit entity that would take them off the so-called speculative market. But Brian Peters, director of the land trust, said that would require the properties selling at a price low enough to ensure they don’t remain overloaded with debt.

The city backed a bid over the summer from a “mission-oriented” developer, Spatial Equity, to buy the 39 buildings and transfer some of them to the community land trust. The deal may eventually come with city capital resources, but no commitments have been made. The levers the city can pull are limited, and it cannot ultimately control how the sale goes: the initial $68 million offer from Spatial was rejected by creditors as too low. Negotiations continue.

“We know properties are in high disrepair, they have a high need for rehabilitation, and with the money [the lenders] are asking for, that rehabilitation can't happen,” Peters said in an interview over the summer.

He said part of the case being made to investors who hold the bank notes is that the restrictive rent regime is here to stay. “For those that were able to squeeze the last dollars out of the lemon, there’s no more dollars to be squeezed now,” Peters said.

Will the rent laws change at some point in the future? The landlord lobby is feverishly trying to make it so. Weaver seems aware that failing to stabilize the buildings could further the industry’s case.

“What I’m hoping is that Cea and the mayor and the tenant groups realize that they’re in political control now, but that eventually they’re not going to be again,” Cestero said. “And do they try to solve this problem for the long run, and try to take the politics out of the equation?”

Dreams and compromises

In her nine months on the job, Weaver has frequently been painted by critics as a kind of Marxist ringleader at the helm of a socialist housing transformation.

A series of “rental ripoff” hearings she organized earlier this year were compared to show trials by landlord advocates. A Washington Post editorial referred to her as the mayor’s “new tenant tsarina.” A Wall Street Journal opinion piece titled “Mao Meets Manhattan” accused the administration of vilifying landlords “in the manner of the Cultural Revolution.”

In person, Weaver is a careful speaker, someone who seems acutely aware of how the things she says now might be perceived, and how they might reflect on Mamdani. She is more diplomatic in her language than some of her past rhetoric might suggest. Even people who view activists of her ilk with disdain allow that Weaver is savvy, strategic and, ultimately, realistic.

But she is also ideological, and much of what she has long argued is in fundamental opposition to how the real estate market operates today. She is profoundly skeptical, for example, of the use of housing as an investment vehicle. She said on a podcast in May 2021 that the goal of rent regulation is to “limit the speculative value of the land” and “have the housing actually be worth less.” (It was on this podcast that Mamdani, then a fresh-faced state assemblymember, said most of what he knows about housing he has learned from Weaver.)

“The unsafe living conditions are downstream from the building being treated as something that’s meant to generate wealth for a landlord and not something that’s meant to be a place for somebody to live,” Weaver said in an interview with Dissent, a left-leaning magazine, last year.

She once organized a trip to Vienna with a group of activists and politicians to tour the city’s vast stock of municipally-owned housing. She was part of the leftist brain trust that then produced state legislation, which is still pending, that aims to usher in a revival of publicly built and owned housing in a country that has long since given up on that concept.

One problem for socialists — both practically and symbolically — is the crumbling state of New York City’s existing public housing. These buildings are often held up as proof that government ownership has already failed, with the city itself one of the worst landlords in town. The reasons for this deterioration are complex, chief among them a decline in federal funding that began in the 1980s.

A federal reversal on that is unlikely to materialize, so the city has for years leaned on new financing models to fund repairs that some opponents deem akin to privatization. Both Weaver and Mamdani were once critical of a program known as PACT that offloads day-to-day management of public housing to private owners. Since taking office in January, however, Mamdani has embraced a controversial use of that program at a Manhattan public housing complex with the city’s biggest private developer, Related Companies. Weaver has taken a key role in working to ameliorate ongoing concerns public housing tenants have with that plan.

She has helped Mamdani navigate other positions that are at odds with segments of the broader left as well, like his embrace of private real estate development. This has made her controversial within corners of the Democratic Socialists of America, where some hard-liners have wanted the mayor to take a more antagonistic approach to the private sector.

Asked about her reputation as a radical, Weaver interjected: “Other people think I’m kind of a sellout.” Asked whether she’s moderated over the course of her career, she laughed.

Some of her opinions have changed, she conceded. A decade ago, she was a leading critic of then-Mayor Bill de Blasio’s administration for working with for-profit developers. That’s one issue on which she — and Mamdani — have shifted.

The mayor has surprised and heartened some observers with his yes-in-my-backyard bent, though some have argued the approach is incoherent. One critic described the administration’s housing policy as “capitalism for developers, communism for landlords.” Weaver disagreed with that framing, but found the argument interesting: “I like to know what my smartest critics think.”

“Tenants need more places to live, and tenants need more stability,” she said. “That’s what we’re collectively hoping to execute.”

Weaver’s allies like Kumar, of the tenant coalition, are giving the administration space to figure out where they can push the boundaries, and where they have to work within the existing system.

She and others pushing for transformational change acknowledge much of it goes beyond the city’s fiscal capacity or existing infrastructure. There is no existing public developer that rivals the capacity or sophistication of the private sector. The city budget relies heavily on property tax revenue, which is contingent on real estate values continuing to rise. And given the ongoing budget crunch, City Hall is not in the financial position to fund any kind of transformation, at least not on its own.

“For a really long time, our housing system has been mostly geared towards people who are seeking to profit from housing,” Kumar said in an interview. “It’s going to take a lot of effort and time to figure out how we reorient that landscape.”