Prewar co-op kitchens are not the stuff of today’s real estate fantasies: they’re notoriously tiny and closed off. Ripping them out is the number-one way to transform a dated space, and that’s exactly what the buyers of this one-bedroom Upper East Side apartment did. After they sealed the deal for $550,000 in 2011, the buyers embarked on a renovation that brought the apartment a sleek new kitchen that opens it up to the living area. The bathroom also got an aesthetic update, with a glass shower enclosure. Four years later the apartment is back on the market asking $780,000 (and looking a heck of a lot more modern.)