Zohran Mamdani promised to freeze the rent, and, to his credit or blame, depending on which end of the lease you occupy, he has now delivered the essential part of that promise. Mayor Mamdani did so, not by standing on the steps of City Hall and personally ordering every landlord in New York to reach for the smelling salts, but through the New York City Rent Guidelines Board, which voted to freeze rent increases on roughly one million rent-stabilized apartments. Since Mamdani appointed six of the ten members of the board, it amounts to the same thing.
That distinction matters: he did not freeze every apartment in New York. He did not freeze luxury towers, market-rate brownstones, or the rent on a closet in Brooklyn now advertised as “cozy, sun-adjacent, artist-friendly space.” What he froze were the allowable increases on the already rent-stabilized apartments—the giant middle category of New York housing that is neither free-market nor old-fashioned rent-control. These are the units where tenants already have strong renewal rights and landlords are already limited in what they may charge.
Still, as campaign promises go, this one was not merely symbolic. The board approved a zero percent increase on both one-year and two-year leases. That is the important part. Prior rent freezes usually gave tenants relief for one year. This unprecedented move extends the logic to two-year renewals as well. Mamdani promised tenants that their rent would not go up. For covered tenants choosing a renewal lease beginning under this order, that is now essentially true.
The immediate political benefit is obvious. If you are a tenant in a rent-stabilized apartment and your rent was about to rise, this feels like someone finally threw you a rope. New York rents are absurd. Working people are squeezed. Families are doubled up, priced out, or forced to spend the grocery budget on the privilege of living near a subway stop that smells faintly of hot brake dust and despair. A rent freeze is simple, understandable to the uneducated, and immediately popular with the people who receive it.
But economics has a nasty habit of showing up after the applause ends.
Start with tenant behavior. If both the one-year and two-year lease options carry a zero percent increase, what rational tenant planning to stay in the apartment would choose only one year? The two-year lease becomes the obvious choice. It is not greed. It is arithmetic. Why lock in one year of protection when you can lock in two? If the Rent Guidelines Board comes back next year and allows an increase, the tenant who chose one year is exposed. The tenant who chose two years is protected.
That means a large share of tenants will likely pick the two-year lease. The landlord will not merely lose one year of increases, he may lose two. Meanwhile, the building does not get a rate freeze from the insurance company. It does not get a tax freeze from the city. (And Mayor Mamdani is proposing to raise property taxes by 9.5%). The plumber does not say, “Never mind, this one is for the revolution.” The boiler company does not repair the heat out of solidarity. Labor, insurance, taxes, utilities, repairs, debt service, compliance costs — all of these keep moving.
This is where the romance of rent control collides with the plumbing.
A building is not a moral abstraction—it is a physical object with a roof, pipes, wiring, elevators, boilers, bricks, locks, stairs, fire systems, trash areas, and tenants who quite reasonably expect all of those to work. If rent is frozen while costs rise, the owner has fewer dollars available for maintenance. Large landlords may be able to absorb that for a while. Some may even deserve little sympathy. But New York also has small building owners, older buildings, marginal properties, and landlords already struggling with post-2019 rules that limited how much renovation cost can be recovered through future rent.
The result is predictable. Necessary repairs get delayed. Cosmetic repairs disappear. Marginal buildings become more marginal. An owner who would have renovated a vacant apartment may decide not to bother. A unit that needs $50,000 in work but can only legally rent for an amount that will never repay the investment, is not an affordable apartment. It is a stranded asset with a broken stove.
That brings us to the problem of “ghost apartments.” New York already has over 57,000 vacant rent-stabilized units. These are units that are sitting empty because owners say the rent laws make renovation uneconomic. In plain English, they are apartments that exist on paper, languish behind locked doors, and do absolutely nothing for the people who need housing.A city with a housing shortage cannot afford ghost apartments. It cannot afford tens of thousands of legal apartments standing empty while politicians give speeches about affordability. Every empty unit is a small confession that the policy system has failed. The tenant does not get the apartment. The landlord does not get rent. The city does not get a functioning housing unit. Everyone loses—except perhaps the lawyer explaining why nothing can be done until the next hearing.
New York has already run this experiment, and the results in the 1960s and 1970s should make everyone a little less smug about today’s rent-freeze promises. Wartime rent control began as an emergency measure in the 1940s, but by the postwar decades the emergency had somehow become a permanent feature of city life, like rats in the alleys or a subway performer with a guitar. The theory was simple: keep rents low and tenants safe. The reality was less charming. In older buildings, especially in poorer neighborhoods, rents were held below the level needed to cover taxes, repairs, heat, insurance, plumbing, roofs, and the thousand other indignities suffered by buildings that have the nerve to age. Landlords responded exactly as arithmetic said they would: they delayed repairs, cut maintenance, walked away from marginal properties, or let buildings deteriorate until abandonment became the business plan. By the late 1960s, New York’s vacancy rate had collapsed to crisis levels, and through the 1960s and 1970s entire neighborhoods saw disinvestment, abandonment, arson, and decay. Rent control did not cause all of that by itself—crime, poverty, population loss, bad city finances, and urban collapse all had supporting roles—but strict rent control helped turn ordinary housing into a financial trap. Eventually, the city’s own housing authority begged to end rent control.
The real solution to high rents is not mysterious. New York needs more housing. Not slogans about housing. Not hearings about housing. Not a blue-ribbon commission to study whether people prefer sleeping indoors. Actual housing. More apartments. More density. Faster approvals. Lower construction barriers. A system in which building rental housing is treated as a public necessity rather than a suspicious activity requiring seven consultants, fourteen signatures, and a goat sacrifice before the zoning board.
A city cannot simultaneously tell private capital, “Please build and maintain rental housing,” and “By the way, your future income may be politically frozen whenever rents become unpopular.” Developers and lenders are not sentimental creatures—they are experts who price risk. If New York becomes a place where the return on rental housing is increasingly controlled by politics, fewer people will build rental housing unless the city pays them, subsidizes them, gives them tax breaks, gives them land, or forces them through zoning mandates.
That may be Mamdani’s actual preference: more publicly-driven housing, more subsidized housing, more city-guided construction. Fine. Then the question becomes whether the city can actually build at that scale, at that speed, and at a cost that does not turn every affordable apartment into a marble monument to bureaucratic process. Promising 200,000 units is easy. Delivering them in New York is where campaign poetry goes to die.
A comparison with Buenos Aires is useful because Argentina recently tried the opposite experiment. Argentina’s earlier rental law had heavily regulated lease terms and rent adjustments. When President Javier Milei repealed those controls, the Buenos Aires rental market changed rapidly. Landlords who had withheld units put them back on the market. Rental listings rose sharply. Real rents fell or stabilized after inflation, at least in the first period after repeal. Landlords are now competing for tenants by offering lower rents or improved amenities.This is a lesson worth noticing. When the rules made renting unattractive, supply disappeared. When the rules were loosened, supply came back.
New York is choosing the opposite, protecting current tenants by squeezing future returns. In the short run, that works for the people lucky enough to have a covered apartment. In the long run, it risks creating fewer available apartments, worse maintenance, more ghost units, and even higher pressure on the uncontrolled market.
That is the oldest problem with rent control. It is wonderful if you are inside the lifeboat. It is less wonderful if you are swimming beside it.
Mamdani delivered what he promised. That should be acknowledged, but delivering a promise is not the same thing as solving a problem. Freezing rent may help today’s tenant sign a two-year lease, but does not fix the boiler, finance the renovation, lure the builder, or bring the ghost apartment back to life.
The first step to achieving affordable housing is to have housing. That sounds almost too simple to say, which may be why politicians avoid saying it. New York does not need a better way to ration scarcity. It needs less scarcity.


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