This 1,809-square-foot unit is the first resale at Sackett Union, the Carroll Gardens condo building that opened its doors at 291 Union Street in 2013. It’s got three bedrooms, two and a half baths, and a daunting price tag: $2,750,000, or just above $1,500 a square foot.

The place is enormous, bigger even than an old-school co-op, but with a modern layout. Among other things, that means an open-plan living room/dining room/kitchen, measuring 30 feet wide, with a wall of windows.