Bedrooms: 1+ Bathrooms: 2 Square feet: 1,350 Maintenance: $2,241 — How spacious is this one-bedroom duplex co-op? Well, it started life as a two-bedroom (and can “easily” be converted back). There’s even more space to take advantage of on the private, 500-square-foot terrace. One thing that won’t change: the fantastic location in a cast-iron building on East 11th Street, near Union Square. Agents: Meir Roth and Lenny Sporn, Prudential Douglas Elliman, 212-350-8515 and 212-350-8543