A former tank factory may go tech.

Jared Kushner’s family Kushner Cos. and Gary Barnett’s Extell Development closed on the purchase of 80 West End Ave. this week for $84 million, The Post has learned.

The nearly empty industrial building was purchased directly from Walter & Samuels, which had paid $91.36 million in 2008.

The 235,000 square-foot 1912-era building has 15-foot floor-to-ceiling heights on each of six stories and a parking garage for 70 cars.

The seventh-floor penthouse has 21-foot-high ceilings and opens to two roof decks.

A key element is that it is accessible from three of the building’s four elevators.

Sited between the West 63rd Street cul-de-sac known as Thelonious Sphere Monk Circle and West 64th Street, the property is near both Extell’s signature Riverside Center project and Lincoln Center.

None of the parties returned requests for comment.