Metro

Preppies growing nowhere

A posh private school for girls has lost out on an expansion plan that involved evicting elderly residents from an Upper East Side apartment building, The Post has learned.

The Brearley School — whose alumnae include Caroline Kennedy and Kyra Sedgwick — had been trying to buy half of the building at 85 East End Ave. for four years but no longer has a contract to do so, sources say.

Brearley, which said it has run out of space to expand its nearby campus, wouldn’t say why the deal fell through.

“The Brearley School remains committed to acquiring additional teaching space,” the upper-crust school said in a statement.

BlackRock Realty, which owns the building, declined comment.