Rent-Stabilized Buildings Change Hands as Mamdani’s Freeze Begins

New York’s Rent Guidelines Board set a 0% increase on about one million rent-stabilized apartments, and the buildings themselves are already trading at 43% below 2019 prices. The freeze covers new one-year and two-year leases starting October 1, 2026. Tenants who already hold those leases keep the same rent. Owners who still hold the brick get no new money against fuel, insurance, and tax bills that have kept climbing.

That is the trade the December 2025 fire sale was pointing toward. Cheap listings were not an emptying of the market. They were the start of a handoff.

What the October Freeze Covers

On June 25, 2026, the board voted 7-1 for Apartment and Loft Order 58, the first time it has frozen both lease terms at once. Mayor Zohran Mamdani, in office since January 1, 2026, had named six of the nine members. He called the result “a historic victory for New York City tenants.” The order applies to leases that begin on or after October 1, 2026, and on or before September 30, 2027.

ORDER 58 AT A GLANCE

• The increase: 0% on both one-year and two-year leases for rent-stabilized apartments and lofts.
• The window: New leases starting October 1, 2026, through September 30, 2027, over lawful rents paid on September 30, 2026.
• The stock: About one million apartments, the pool the board is charged with adjusting each year.
• The vote: 7-1 on June 25, 2026, filed with the City Clerk on June 30, with public member Arpit Gupta the lone no.

Earlier freezes under Mayor Bill de Blasio applied only to one-year leases. During Mayor Eric Adams’s term the board allowed one-year increases that added up to about 12% over four years. Order 58 stops that clock for a full year, and for two-year deals it stops it longer than the board has ever done.

Hours before the vote, owner member Christina Smyth resigned. She said the rebuilt board “was required to deliver a rent freeze.” Owner member Maksim Wynn, a Mamdani appointee, voted yes. Ann Korchak, board president of the Small Property Owners of New York, called the session “an absolute farce” and said the board had gone forward short one owner voice.

Stabilized Buildings Now Clear at 43% Off

The price reset did not wait for October. Ariel Property Advisors, in its Q2 2026 multifamily review, found rent-stabilized buildings made up 42% of trades and only 11% of dollar volume. Citywide average pricing sat 43% below its 2019 pre-HSTPA level at about $149,000 a unit, and 49% lower per square foot at $201. The Bronx averaged $69,000 a unit, 59% below the 2019 mark, and $76 a square foot.

In late 2025, brokers were already marketing walk-ups as bargains. Charles Olson of Keller Williams Realty Empire in Brooklyn had a 30-unit, 22,200-square-foot rent-stabilized building at the edge of Crown Heights at $2.27 million, next to a three-bedroom condo listed at $2.29 million. By mid-2026 the tape had moved from asking prices to closed distress.

CLOSED RENT-STABILIZED SALES, Q2 2026

The Fordham Manor building had been bought for $4.7 million in 2021. Five years later it sold out of foreclosure at half that basis. Ariel’s Shimon Shkury and his team wrote that 2021 loans are coming due at roughly double their original rates, and that lenders are forcing sales rather than rolling the debt. The middle of the market, six- to nine-unit houses, is not the buyer. Larger, cheaper paper is.

A Thin Circle Still Writes the Checks

The people on the other side of those contracts are not a broad investor class. Brokers tracking the book describe a small group of local operators who will buy at an 8% to 10% cap rate and live with the regulation, plus a few firms large enough to take a 93-building bankruptcy in one bite. Financing is tight. The board’s 2026 mortgage survey put average vacancy and collection losses at 5.00%, up from 3.14% the year before, with a typical debt-service coverage ratio of 1.26.

Before Election Day, real estate executives warned before the vote that a Mamdani win would shake values and freeze new deals. The warning aged in one direction. Free-market Manhattan product still cleared. Ariel clocked free-market buildings at $892 a square foot in the borough, with median asking rents still rising. City Comptroller Mark Levine said Manhattan’s median market rent was $5,295 in June 2026, up 8.2% year over year, and Brooklyn’s was $4,350, up 8.1%.

Stabilized paper did the opposite. Family owners who bought when vacancy bonuses still existed are the ones exiting. The buyers who remain can wait. They do not need every unit occupied this year if the legal rent cannot cover a gut renovation. That is the second move inside the cheap price: the building changes hands without the empty apartment coming back.

57,421 Apartments Sat Empty in April 2025

New York State’s Division of Homes and Community Renewal sent the Rent Guidelines Board a letter with a point-in-time count. Deputy Commissioner Anthony Tatano wrote that 57,421 rent-stabilized apartments were empty on April 1, 2025. The same register showed 49,426 empty on April 1, 2024, a rise of 7,995. That is about 6% of the one million units. Tatano warned the figure includes new buildings not yet leased and ordinary turnover, and “does not indicate the cause of vacancy.”

THE EMPTY-UNIT COUNT

1. 2019: About 5,000 rent-stabilized homes sit empty, the baseline used before the Housing Stability and Tenant Protection Act ended vacancy decontrol.
2. April 1, 2024: HCR’s register shows 49,426 empty stabilized apartments.
3. April 1, 2025: The count rises to 57,421, with the largest jumps in Brooklyn and Queens.
4. June 25, 2026: The board freezes both lease terms, leaving owners no new rent to fund work on units that are already dark.

The board’s own housing reports still show a citywide vacancy rate of 1.41% and 0.98% inside the stabilized stock. Those rates track units offered for rent. The HCR register tracks units that are empty, including ones nobody is trying to lease. Both can be true. A building can show a tiny advertised vacancy and still hold apartments that have not been brought back after the last tenant left, because the 2019 law removed the old path to recoup a renovation when a lease turned over.

Olson put the owner’s choice in plain terms last winter: it does not pay to rework a unit if the legal rent is stuck. A freeze on top of that law does not create a new incentive. It removes the last one that was still on the table, a modest annual bump.

Negative Income in the Bronx Books

The board voted with a 2024 income-and-expense file on the table, not a 2026 one. In a sample of nearly 17,800 buildings and more than 805,000 apartments, net operating income rose 6.2% from 2023 to 2024, or 2.2% after inflation. That citywide average hides the buildings the freeze actually hits hardest.

NOI CHANGE, 2023 TO 2024

Average monthly collected rent in buildings with stabilized units was $1,681 in 2024. Average income was $1,890, operating cost $1,203, and NOI $688 a unit. In the Bronx, NOI was $359 a unit a month. In core Manhattan it was $1,464. Buildings that are 100% stabilized, the ones with no market-rate cushion, saw NOI grow 2.4%, not 6.2%. Negative-NOI buildings were 9.2% of the file, a tick down from 9.3%. Of those distressed properties, 37.5% were in Manhattan and 34.5% were in the Bronx.

Costs did not wait on 2024’s books. The 2026 Price Index of Operating Costs rose 5.3%. Fuel was up 11.0%, insurance 10.5%, maintenance 6.0%, and taxes 2.6%. NYU’s Furman Center, looking at pre-1974 buildings that are at least 90% rent-stabilized, found a median tax bill of $3,082 a year, or $257 a month, across 463,333 units, a $1.5 billion citywide haul. Taxes were about 27% of operating costs and about 17% of rental income for that stock. Imputed rent at the 50th percentile in Furman’s 90%+ slice was $1,344 a month. Gross income in those buildings has fallen in real terms since 2019 even as tax bills have not.

Ariel’s own read of the RGB series is a 40% jump in operating expenses over five years against 16% of allowed rent growth. A 0% year does not close that gap. It widens it for any owner whose 2024 NOI was already thin, which is most of the Bronx file and most fully stabilized houses.

City Hall’s Bid to Pick the Buyer

The largest handoff of the year was not a Park Slope walk-up. It was the Pinnacle Group’s collapse. Pinnacle put about 93 buildings and more than 5,100 mostly rent-stabilized apartments into Chapter 11 in May 2025. Summit Properties USA won the auction in January 2026 at $451 million, about $88,000 a unit, after a judge refused Mamdani’s request to delay bidding. The deal closed in March 2026. Flagstar Bank held more than $564 million of debt on the paper. The city said it was owed about $13 million in taxes and fines.

Mamdani directed the Law Department to step in hours after he took the oath on January 1, 2026. The Mayor’s Office to Protect Tenants says Pinnacle carried more than 5,000 housing violations and 14,000 complaints. Summit chair Zohar Levy pledged at least $30 million over five years and a plan to cure about half the violations within 60 days of purchase and the rest within 180 days. Bankruptcy Judge David Jones said he was satisfied with that plan even though the court did not have to require it.

Summit evinces every good intention to run this portfolio properly. They have shown more than adequate financial wherewithal to do this.

David Jones, U.S. bankruptcy judge, January 2026 ruling

City Hall framed the close as a tenant win because of those pledges. It was also a proof of the new ownership map. A bankrupt regulated portfolio did not go to a community land trust or to the city. It went to a private buyer who could write a $451 million check and live with frozen rents, in exchange for a repair schedule the mayor’s office now says it will watch. When City Hall likes the next buyer, it cheers the transfer. When it does not, it tries to block the auction. Either way, the buildings move. The empty units do not automatically come with them as livable stock.

Repair budgets do not freeze with the rent. An owner who cannot fund a boiler or an elevator still faces the city’s violation mill, and a building that slides far enough becomes the next “distressed” file for a steered sale. Frozen income plus a crackdown on bad conditions is a conveyor, not a preservation plan.

Order 58 Goes to Court Before October

A group of rent-stabilized owners filed an Article 78 petition in Richmond County on July 22, 2026, asking a court to throw out Order 58. The caption leads with Kenilworth Holdings LLC and several other building LLCs. Randy Mastro of Dechert is among the lawyers. The papers call the June 25 process a sham and say the board ignored its own cost data. The case was moved to Manhattan. Justice Brendan Lantry heard arguments on September 3, 2026, and did not rule. Lawyers for the board told him many tenants had already renewed at 0%, and that pulling the order back could scramble those leases before October 1, 2026.

The rebuilt board was required to deliver a rent freeze.

Christina Smyth, resigning RGB owner member, June 25, 2026

Korchak’s group had already said the math of the board’s research did not support a zero. The 2024 NOI gain and the 2026 cost index can both be read aloud in the same room, and they describe different years. The lawsuit asks a judge to say the board was not allowed to treat a campaign pledge as the finding. Until that ruling lands, Order 58 is the rule for leases that start October 1, 2026.

Tenants in place on that date get a year, or two, with no increase. Owners who already sold at $59,000 a unit are out. Owners who still hold the Bronx book will run 2026 costs against 2024 rents. The 57,421 apartments that were empty in April 2025 do not get cheaper to reopen because the occupied ones cannot pay more. The next buyer of those buildings will be someone who can wait, or someone City Hall prefers. The freeze starts on October 1, 2026, unless a judge says it does not.