Topper Mortimer — the ex-husband of “Real Housewives of New York” star Tinsley Mortimer — is relisting his Upper East Side co-op for $2.2 million.

It originally asked $2.7 million last year.

The home, at 66 E. 79th St., comes with two bedrooms and three bathrooms.

Other touches include a windowed kitchen and a staff room that could be used as a study, a nursery or a guest room.

A large foyer opens to a living room with a marble-mantled woodburning fireplace, beamed ceilings, moldings and a bay window.

There’s also a formal dining room with herringbone mahogany floors. The building, which dates to 1926, has 16 apartments — two per floor, which share an elevator landing. Mortimer bought the unit for $1.39 million in 2006.

The listing brokers, Stribling’s Barbara Evans-Butler and Cian Connor, declined comment.