The mayor has reframed the debate about apartment production in New York.
This week, those who want to build more housing in New York have been grappling with Mayor Zohran Mamdani’s reversal on a plan to build affordable housing for seniors and homeless New Yorkers where the Elizabeth Street Garden now sits. It’s a real disappointment, albeit one tempered by the fact that the Adams administration made the task much harder on its way out the door by designating the garden as parkland, a move only Albany can reverse.
But we can’t lose the forest for the garden’s trees. Any upset at Mamdani on this one Lower East Side site should be tempered by a clear-eyed recognition of what this mayor and his administration have already accomplished. It’s fair to say that by offering the most robust housing agenda of any mayor in memory, Mamdani has reframed the debate over apartment production in New York City. It’s remarkable indeed that a democratic socialist has made clear that this is not about developers and communities being in competition — but about how the broader needs of the people of the city are up against an old, ossified bureaucratic and political machinery that for too long has prevented the city from producing the homes it desperately needs.
One number should anchor every discussion on the issue: 1.4%. That is the city's net rental vacancy rate according to the Housing and Vacancy Survey. In a city with roughly 2.36 million rental apartments, fewer than 34,000 of them are available. And the deeper you go, the worse it gets. Apartments under $1,100? A vacancy rate of 0.39%.
New York City’s rental market is failing the low-income residents who need it most. It is no surprise that the city’s homeless population remains so high, with the Coalition for the Homeless calculating that a staggering 87,145 New Yorkers have slept in New York City's shelters every night in the month of June alone. Of those, over 28,000 are children.
This was the situation waiting for Mamdani when he was sworn in as mayor. He won running on affordability, powered by renters convinced that developers are the villains of this story. But with the vacancy rate near 1%, the problem could never be put at the door of developers, and well into his first year, it’s clear that Mamdani, whatever his ideology, fully understands this reality. The democratic socialist mayor has spent his time in office assembling a supply-side housing agenda, lending his political capital to the deepest environmental review reform Albany has passed in 50 years, and setting public deadlines he can be held to.
This formula (just build!) has worked elsewhere. The question is whether Mamdani will be able to see it through. It is worth noting that a young, far-left mayor in America’s largest city has the most pro-housing agenda of just about any local leader anywhere. I say this as a Democrat who was skeptical that a member of the DSA would ever subscribe to the ideas of the YIMBYs — the coalition of people who seek to solve the housing crisis with an emphasis on adding more supply, including private development.
A scarcity the city built for itself
New York was not always this stagnant. The city built constantly for most of its history, with housing more or less keeping pace with population, until the 1960s. At that point, production fell behind and has stayed behind for 60 years.
As Annemarie Gray of Open New York has argued, plenty of the rules now strangling construction started as legitimate safeguards before calcifying into vehicles of obstruction. For decades, the idea of changing the character of a neighborhood has been seen as a deadly sin in many circles. Member deference gave every council member an effective veto over rezonings, environmental review piled years onto harmless projects and downzonings shrank what could legally be built.
The winds of change began to blow during Eric Adams’ administration, with the passage of City of Yes and the approval of four pro-housing ballot measures in November 2025. The City was turning toward growth before Mamdani arrived. His job now is to hit the accelerator.
During the campaign, New York’s real estate industry spent heavily to keep Mamdani out of Gracie Mansion. When he won, they braced for a mayor who would freeze rents and fight the builders.
They were not wrong — Mamdani did freeze the rents. By my reckoning, this was a mistake. It is the one lever in Mamdani’s housing agenda that pulls against every other lever.
But while the battle over the rent freeze garnered the lion’s share of the headlines and traffic on social media, Mamdani also did something unexpected: he adopted much of the real estate industry's diagnosis of what keeps new housing from getting built.
On Jan. 1, his first day in office, he signed executive orders creating the SPEED task force, charged with stripping delay from the affordable housing pipeline, and LIFT, tasked with finding City-owned land for housing. March brought the Neighborhood Builders Fast Track, which cut developer selection on public land by eight months, and the first use of the voter-approved Expedited Land Use Review Procedure. May brought the SPEED (Streamlining Procedures to Expedite Equitable Development) report, his first executive budget and the Block by Block plan. And at the end of the month, Gov. Kathy Hochul signed a state budget containing “Let Them Build,” an overhaul of the state environmental review law. Mamdani was an active, public ally in this fight.
Mamdani’s first six months
Any assessment of Mamdani’s first six months on housing should start with SPEED. The task force gathered more than 500 recommendations from builders, advocates and city agencies, all aimed at one target: reducing the time from approval to move-in. The report commits to cutting timelines for all affordable projects by eight months, and by as much as two years for projects that need a zoning change. The targets are specific, which I like, because specific targets make for simple evaluation.
The task force also sought to address the worst bottleneck for rezoning projects, a single review called pre-certification, which takes about two years to process. SPEED compresses it to roughly six months. Citizens Budget Commission research puts the cost of that two-year wait at about $82,000 per apartment. SPEED also halves the delay that stings most: Today, a finished building sits a median of 210 days between completion and move-in, seven months during which a family waits in a shelter. The plan has an ambitious commitment to shorten that to fewer than 100 days.
These reforms require no vote in the state Legislature or the City Council, and none touch the City's discretionary review, the case-by-case approval that big projects must win before breaking ground. That is why Mamdani could move fast. Mayor Adams tried this tactic with his Get Stuff Built report, which offered a nearly identical diagnosis. But announcing reform and delivering it are different jobs. SPEED will be judged on whether, a year from now, that 100-day move-in target is real.
The most substantial change to New York's production landscape so far this year came from a fight Mamdani did not have to pick. Hochul's Let Them Build agenda, the first major legislative streamlining of the State Environmental Quality Review Act since 1975, exempts qualifying New York City housing of up to 250 units (500 in the densest districts) from environmental review entirely; the State's own analysis found SEQRA can slow housing projects by as long as two years.
Mamdani endorsed the proposal early, calling it a way to “deliver an affordability agenda on the timetable needed,” and Hochul enlisted him to help push it past a reluctant Assembly. A democratic socialist mayor spending capital in Albany on an environmental review rollback developers have sought for decades — who had that on their bingo card during the mayoral campaign? It is also a significant step toward achieving SPEED's most ambitious target: The pre-certification cut depended in part on State action, and the State acted.
The Block by Block report expands upon that by focusing on scale. The estimates add up to a whopping $22 billion in capital over five years to build 200,000 new affordable, rent-stabilized homes and preserve another 200,000 over a decade. The New York City Housing Authority (NYCHA) gets $5.6 billion, its largest capital commitment in decades, plus a reboot as a developer on its own land. And there is a homeownership track in a city where 7 in 10 households rent. That is real ambition next to de Blasio's 300,000 built and preserved combined, or Adams' 500,000-unit “moonshot” that never bothered to specify exactly how much would be affordable.
Importantly, Mamdani aims squarely at the bottom of the market, where the 0.39% vacancy rate lives. But almost all of the planned housing is subsidized, rent-stabilized and union-built. This does the most for the poorest tenants, but it will not, on its own, move the citywide vacancy rate. Only pairing this effort with market-rate construction can achieve this goal. The good news is that the rest of Mamdani’s agenda serves that goal, helping to shorten approval timelines and to lower costs for every builder, not just the subsidized ones.
But the most important thing Mamdani has done in his first six months shows up in no single plan. For a generation, New York's housing politics ran on a forced choice: You were for building, or you were for protecting tenants. So far, Mamdani has refused to choose. In his telling, the enemy is the machinery that stalls new housing. That reframe earns him something his predecessors never had — permission from his political base to speed up construction because the thing being sped up is delivery for them.
Eric Kober of the Manhattan Institute calls Mamdani a “left-YIMBY.” Alex Armlovich, my former Niskanen colleague, describes his coalition management as a deliberate split: market liberalism for new housing, aggressive protection for the old stock. Everyone gets the half they care about most, and the mayor gets to build. The center-left has spent two years arguing, mostly in theory, over whether it can still build things at all. Mamdani is putting this idea to the test, and doing so from the wing of the party most suspicious of developers. If he succeeds, every Democrat will eventually borrow the script.
