Mamdani unveils Block by Block housing push

Zohran Mamdani’s administration laid out its “Block by Block” plan on May 26, aiming to add 200,000 homes in ten years, turn unused offices and hotels into housing, and tighten enforcement against “bad landlords.” The mayor also promised steps for buyers, base

By Tuesday morning, Zohran Mamdani was already talking about something New Yorkers know too well: whether they’ll be able to afford to stay.

At a press conference. the mayor said. “When New Yorkers can afford a home. they can afford to dream.” Minutes later. his administration released a detailed policy blueprint—called “Block by Block”—that lays out how the city plans to build more apartments. convert unused commercial space into housing. and help residents navigate a market where rent pressure has become a constant.

The plan’s timing matters. On May 26. City Hall dropped the policy package with goals stretching over years—alongside a reminder that housing access is at the center of Mamdani’s affordability agenda. including “buzzy promises” to freeze the rent for a large swathe of NYC apartments and address “bad landlords.”.

The centerpiece in the city’s math is construction. New York faces vacancy rates hovering at historic lows. and Mamdani’s blueprint is built to get more homes onto the market while trying to reduce the cost of building. The plan sets a goal of 200. 000 more homes in the next ten years. backed by $2.5 billion allocated toward more building from the mayor’s budget. The new housing would be subject to regulations that bolster construction workers’ pay and benefits.

City Hall also wants to build on public land. including Sunnyside Yards. a rail hub in Queens between several bustling neighborhoods. The proposal would connect neighborhoods currently separated by rail tracks and build a deck over the rail infrastructure that could house what the report calls “a new complete neighborhood.” The report also says the city would need federal support to build that new neighborhood—part of Mamdani’s pitch to Queens native Donald Trump in early 2026.

Some of the measures are meant to lower costs without relying only on new bricks. One program would lower insurance costs for affordable and rent-stabilized units, after those buildings saw soaring premiums. The plan says it would infuse $100 million to help fund a newer. more affordable insurance program. with the goal of keeping costs more stable for existing housing and saving the city money on new builds. since the city currently has to subsidize higher insurance prices.

The plan also points to practical affordability upgrades: expanding access to a water affordability benefit for those in affordable housing; expanding a program that helps rental buildings and income-restricted co-ops improve their energy efficiency; improving elevator service in public housing; and addressing leaks and plumbing issues in those units.

But “Block by Block” leans heavily toward what the city can reuse. Through partnerships with developers and revised zoning policies, Mamdani wants to convert some existing commercial buildings into apartments. City Hall said the recent overturning of a decades-old state cap on new developments would allow more NYC buildings to be allocated toward housing.

A major example is the Stewart Hotel in midtown Manhattan. The local and state governments are working to convert the historic, currently vacant, Stewart Hotel into permanent housing for 550 households. The plan says roughly half the units would be dedicated to providing affordable options for formerly-homeless and low-income households. It also calls for some of the buildings’ square footage to be dedicated to providing on-site social services for tenants.

In Brooklyn, a largely vacant commercial skyscraper on Flatbush Avenue received zoning approval in March. The building—on city-owned land—will be converted into 1. 200 apartments. with 350 of them “deeply affordable.” In lower Manhattan. City Hall also plans to convert the former private office building 100 Gold Street. which currently houses various city agencies. That project would create 3,700 apartments, including 900 permanently-affordable homes.

Even for renters who aren’t waiting for big towers, Mamdani’s plan tries to open smaller pathways. The city says it is working to make it easier for New Yorkers to build accessory dwelling units (ADUs) on their property. That includes a program to help residents navigate their hyper-local zoning laws for ADUs, especially in historic districts. The plan says City Hall will streamline permitting for manufactured ADUs. which it describes as significantly cheaper than custom-built units—making them easier for property owners to install for use by renters. elderly family members. or guests.

Beyond new construction and conversions, Mamdani wants to legalize housing that already exists. The mayor plans to begin a pilot this year to legalize basement apartments in the city. The aim is to make it easier for homeowners to ensure their basements are up to code and can be made into safe apartment units. Homeowners who participate in the pilot this year would receive some financial support from the city to install smoke alarms. test for contaminants. and more.

For tenants, the plan shifts from buildings to behavior. With renters making up 70% of city residents. the Mamdani administration said it is taking steps to curb “bad landlords” by strengthening code enforcement and taking action against property owners who harass or neglect their tenants. City Hall is already hosting “rental ripoff” hearings in all five boroughs so New Yorkers can share concerns directly with City Hall. Mamdani also said he is strengthening legal avenues for tenants to expedite emergency repairs. supporting tenant unions that help renters collectively protect their rights. and reducing evictions while speeding up cases in housing court.

There are affordability plans aimed at buyers too. Mamdani said he is set to expand an existing downpayment assistance program to serve up to 300 lower-income first-time homebuyers. He also added a new mortgage assistance program that would provide repayable. no-interest loans to help low-income homeowners resolve mortgage problems.

Then there is the issue that could affect living costs immediately: rent stabilization. Mamdani said he is moving forward on plans to freeze the rent in NYC’s rent-stabilized apartments alongside City Council, but the policy has not yet been implemented.

The success of a rent freeze, alongside many other parts of the city’s housing plan, will hinge on legislative support and funding at the local, state, and sometimes federal levels. Even so, Mamdani sounded resolute about where all these efforts could lead.

“Combined, these efforts will lead to growth beyond anything New Yorkers have seen in generations,” Mamdani said. “For some, the dream of home ownership will finally be within reach. Others will be able to sleep easily in homes they no longer fear losing.”

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