Upstate’s own George Costanza will serve at least 28 months behind bars for claiming to be an architect and faking his way through construction projects across New York, authorities said Tuesday.

Bogus building planner Paul Newman was sentenced in Saratoga County Court and ordered to serve between 2 ⅓ years to 7 years in prison after copping plea deals to grand larceny, forgery, unauthorized practice of a profession and scheme to defraud, state Attorney General Eric Schniederman said in a statement.

Newman was busted in April after a long probe that prosecutors dubbed Operation Vandelay Industries — a nod to a running “Seinfeld” bit in which Jason Alexander’s character, Costanza, pretends to be an architect and makes up the name of his firm, Vandelay Industries.

But unlike on TV, lying doesn’t work as well in the real world, according to Schneiderman.

“Deceptively posing as a licensed and registered architect has real consequences – including prison time,” Schneiderman said.

“Those who wish to game the system and take advantage of New Yorkers should take note: no license, no work for you. My office will continue to uphold this standard.”