Mayor Eric Adams will pack the Big Apple’s rent board on the way out the door — and is mulling appointing a real estate reality TV star pal to a seat — in a bid to foil Zohran Mamdani’s key “rent freeze” campaign promise, The Post has learned.

Hizzoner is planning to appoint at least six new members to the Rent Guidelines Board, completely remaking the majority of the nine-person board ahead of the socialist front-runner’s expected mayoralty, according to sources.

One of the candidates for those seats is Adams’ pal Eleonora Srugo, a reality TV real estate agent who nabbed her own Netflix show, “Selling the City,” sources said.

“It’s not about just freezing the rent,” one source said. “It’s making sure that landlords can afford to own rent-stabilized buildings. It’s about affordability. You have to be able to afford that, energy cost maintenance.

“You need these buildings standing up.”

The maneuver by the lame duck mayor would kneecap — at least temporarily — Mamdani’s signature platform, which he has vowed to deliver by handpicking RGB members to push through the agenda item.

Mamdani — a proud member of the Democratic Socialists of America and the heavy favorite to win in November — has made freezing rent for the city’s roughly 1 million rent-stabilized units the cornerstone of his upstart campaign.

But the plan has been met with fierce opposition from the real estate community, which argues that capping rent increases on those apartments will lead to buildings falling into disrepair, citing rising costs in the economy across the board.

Industry experts have also warned that the freeze could lead to an increase in market-level apartments to offset the costs of building upkeep and rising energy bills.

“The mayor cares deeply about ensuring that his efforts to support working-class New Yorkers and promote the creation of as much affordable housing as possible continue beyond this administration,” said press secretary Kayla Mamelak.

“As with any potential appointments, we would announce them if and when they are final.”

Mamelak, while not confirming the move, defended the mayor’s ability to appoint new members at any time.

A mayor can’t unilaterally enact a cap on the monthly costs landlords charge rent-stabilized tenants. But they have outsized influence over the RGB, which is made up of various mayoral appointees expected to represent the interests of the public, owners and tenants.

The last-minute move by Adams would handcuff Mamdani when it comes to the makeup of the board for at least the first two years of the Democratic nominee’s hypothetical first term.

Of the eight members with set terms, two serve four-year terms, while the other six are split with two-year and three-year appointments. The ninth seat is held by the chair, who serves at the pleasure of the mayor.

Currently, six members are serving on expired terms, some holdovers from Mayor Bill de Blasio’s tenure, and can be replaced at any time. A seventh appointee, who was appointed by Adams, is set to leave come Dec. 31.

The move was hinted at by independent candidate Andrew Cuomo in the final election debate this week, when the former governor took a shot at his socialist foe, saying it would be impossible for Mamdani to fulfill his promise about rent since he doesn’t control the board.

Mamdani shot back that he would stack the board with his appointees, similar to how his ally de Blasio achieved repeated freezes during his own tenure.

Adams’ handpicked board members raised the rent cap on stabilized units by at least 3% this year, though he publicly urged the board to take into account the high cost of living for tenants.

That 3%-hike for 1-year leases and 4.5% for 2-year leases, passed in a 5-4 vote in June, was actually scaled back from the increases the board had originally planned to approve.

In an unusual step, the RGB decided to re-vote while under pressure from Adams and the public. The mayor, though, has pleaded publicly for the board to limit the increase to start at 1.75%. 

He still defended the vote and took a shot at Mamdani’s plan. 

“While freezing the rent may sound like a catchy slogan, it is bad policy, short-sighted, and only puts tenants in harm’s way,” Adams said in June. 

Adams’ predecessor de Blasio exerted public pressure and successfully got the board to repeatedly enact rent freezes for stabilized apartments.

Mamdani, a 34-year-old Queens assemblyman, has said he would do the same.

“We’ve seen time and again mayors use their power with the Rent Guidelines Board to hike the rent,” he fired back at Cuomo during the Wednesday debate, attacking landlord profits. 

He repeated his claim, from an RBG report released early this year, that landlords of buildings with rent-stabilized units are raking in 12% in profits.

But that figure doesn’t paint the full picture, only capturing revenue after operating costs and fails to include what the owners have to pony up for mortgage payments.