21 Butler Pl

A four-story pre-war cooperative built in 1915, this low-rise brownstone-style building contains 13 residential units and retains many original period details. Units typically feature high ceilings, hardwood floors, crown moldings, French doors, and windowed kitchens and bathrooms; floorplans range from compact one-bedrooms to convertible two-bedroom layouts with formal dining rooms that can be repurposed as bedrooms or offices. Common areas include an elegantly finished marble entry foyer, a furnished roof deck with panoramic Manhattan and Brooklyn views, and a planted courtyard at ground level. Building services and systems are modest and resident-focused: a part-time or live-in superintendent, basement laundry, bicycle parking, and private storage cages available for a fee. The property is walk-up (no elevators) and maintains a smoke-free policy; pets are allowed under cooperative rules. Located on a quiet, tree-lined block in Prospect Heights, the building sits steps from Grand Army Plaza, Prospect Park, the Brooklyn Museum, Brooklyn Botanic Garden, and multiple subway lines (2/3, B/Q), offering immediate access to cultural institutions, markets, and neighborhood dining and shopping.