NIMBY-compoops

Read this twice to believe it: Brooklyn Councilwoman Laurie Cumbo on Thursday announced she intends to block Mayor de Blasio’s gleaming gift to her Crown Heights constituents: Bedford Union Armory, a spanking new housing complex, recreation center and community space where a vacant building now molders.

The open-to-all facility will offer gym membership as low as $10 a month. Indoor basketball courts and soccer space. A swimming pool with cut-rate, high quality lessons for locals. And discount digs for local nonprofit groups, as community residents and leaders had said they’d wanted.

Affordable housing, too, as well as market-rate rentals to relieve relentless demand by newcomers who’ve been renting older digs in the neighborhood, fueling displacement of long-time residents. And all at zero cost to the city. Thanks but no way, said Cumbo. She has lost her mind — and so have Brooklyn Borough President Eric Adams, Public Advocate Tish James, Controller Scott Stringer and Assemblyman Walter Mosley.

All froth that the project is unacceptable so long as it includes 58 condos that the city’s competitively chosen developer, Don Capoccia, is counting on to pay for the substantial cost of planting a 21st-century gym in a 1903 hall.

This, after Cumbo, Adams, Mosley and a cast of hundreds spent months brainstorming with de Blasio’s Economic Development Corp.

Cheered Cumbo of the resulting plan, back in December 2015: “I feel that we will be getting all that we asked for.” Adams celebrated “a plan that adds tremendous value to a growing neighborhood.” Fawned Mosley: “Truly smart.”

Now, with a reelection primary looming in September, under pressure from a challenger and activists to her left, Cumbo has swung a 180.

In threatening to halt the Bedford Union project, she joins the ignominious company of Queens Councilman Jimmy Van Bramer and Upper Manhattan Councilman Ydanis Rodriguez, who each abused the Council’s tradition of deferring to local representatives’ views on development plans to veto worthy projects.

At least Cumbo has an excuse. Adams offers nothing more than a blank check of taxpayer funds he says he’s prepared to throw into the pot to make up for the many millions of dollars to be lost if the condos disappear.

And Stringer, fiscal steward, has nerve to call for de Blasio to “give the land back to the people.” To be developed how, and with what money?

In the city they represent, public housing tenants desperately await billions of dollars in needed repairs — with Congress and President Trump about to pull out the rug. Limited city housing subsidies, which de Blasio has increased dramatically, are needed most urgently in areas where developers otherwise would not build at all.

This gang’s narrow vision, trained ostensibly on a gentrification-roiled Crown Heights, extends no further than their next election. Keep an eye out for the bill.