He’s taking stupidity to new heights.

The New Jersey teen busted for climbing to the top of then-unopened 1 World Trade Center two years ago is still pulling dopey stunts — snapping dozens of new photos of himself and pals dangling from Manhattan skyscrapers and then posting them online, The Post has learned.

Justin Casquejo, 18 — who received a slap on the wrist for the major WTC security breach in 2014 — broke into an under-construction Central Park South high-rise with a friend at one point and shot video of the stunt, according to footage he posted Nov. 4 on YouTube under his Instagram handle, LIVEJN.

The dizzying footage shows the ditzy daredevil and his pal each dangling by one arm from scaffolding hundreds of feet above the city.

Casquejo, of Weehawken, NJ — who brags on Instagram that he’s “limitless” — has raked in nearly 29,000 followers there.

In the past year, he has posted dozens of shots of himself and pals scaling skyscrapers in Times Square, Columbus Circle and near the Empire State Building.

He appears noticeably taller — and with much longer hair — than two years ago. Also visible in the photos is the same large discoloration that was on his forehead two years ago.

Warning: Explicit language

The teenage adrenaline junkie has irked some New York City firefighters, who say it’s high time he called it quits.

“Should the thrill seeker’s selfish acts fail, it will tie up highly trained technical-rescue resources and put members at risk,” says a post on city firefighter blog NYCFireWire.com.

“In this day [and] age, this is completely unacceptable,” it added.

In March 2014, the then-16-year-old Casquejo crawled through a hole in a fence at Ground Zero, slipped passed a sleeping guard and climbed stairs and scaffolding to the top of 1 WTC.

Casquejo later admitted to breaking a city misdemeanor law against scaling tall buildings without permission, and Manhattan Criminal Court Judge Felicia Mennin let him off without jail time.

“The court is impressed by your sincerity and remorsefulness,” Mennin told the teen in September 2014. “It will now be up to you to prove the court right.”

He was sentenced to 30 days’ community service, and ordered to undergo counseling and write a 1,200-word essay on the risks of the stunt.

But Casquejo was so hooked on his very high jinks that he was arrested just two weeks later — for trying to climb to the top of a historic, 175-foot brick water tower in Weehawken.

He was charged with defiant trespassing and resisting arrest after he tried to run from cops, police said then.

Reached at home on Sunday, a relative said, “Justin isn’t available.” He didn’t return requests for comment by email.

Additional reporting by C.J. Sullivan