New York City tenants might be enjoying a freeze this summer for the first time in history — in their rent.

The Rent Guidelines Board released a report Thursday showing that landlord operating costs covering a million rent-stabilized apartments went up by just 0.5 percent last year, the lowest such increase since 2002.

Tenant and landlord advocates alike said that’s going to put intense pressure on the board and Mayor de Blasio to freeze rents.

In fact, in its range of recommendations to the board, the board staff said the numbers dictate actual rent decreases under some scenarios.

That’s got tenant advocates pumped up that their continual cries for a rent freeze have a good chance of being enacted this year.

“The data we have right now points to either a rent rollback or a rent freeze,” said Harvey Epstein, a tenant representative on the guidelines board who was reappointed by de Blasio last year.

The mayor appoints all nine members to the guidelines board — two representing tenants, two for landlords and five public members.

The board is supposed to set increases on rent-stabilized apartments each June with the intent of keeping landlords financially sound.

Last year, when operating costs went up 5.7 percent, the board boosted rents by a record-low 1 percent for one-year lease renewals and 2.75 percent for two years.

De Blasio sought a freeze last year.

But at the time, the board still contained a number of holdovers from the prior administration.

Now, landlords say they expect the mayor will repeat his call for a freeze — and is more likely to get it.

“We presume again that the mayor will be calling for zero [increase], and he now controls the entire board. So the prospects for a reasonable guidelines board don’t look good to us,” said Jack Freund, vice president of the Rent Stabilization Association, which represents 25,000 landlords.

He called the small bump in operating costs an “aberration.”

“The price index is so low only because there was this one-time drop in oil prices,” said Freund. “But we know the long-term trend on fuel prices is up.”

Staffers at the board estimated the range of rent changes from a possible decrease of 2 percent for one-year leases and 1 percent for two years, to a slight increase of .75 percent and 2 percent, respectively.

The board is not obligated to remain within that range.

City Hall officials would not reveal the mayor’s stance on the issue.

The board will hold public hearings before setting the new rents that cover lease renewals between Oct. 1, 2015 and Sept. 30, 2016.