70 Prospect St

The Flatiron at Union Square is a compact, architect-designed condominium building completed in 2017. It is a boutique, elevator-served development with 16 total units and two ground-floor commercial spaces, organized around an efficient single- to mid-level massing that maximizes natural light through oversized windows and high (9-foot-plus) ceilings. Units are predominantly two-bedroom layouts featuring open-plan living, maple hardwood floors, granite and stainless kitchens with professional-style appliances, in-unit laundry, and generous closet storage. Exterior touches emphasize urban outdoor living: private balconies or decks for many residences, a shared roof deck and common patio, a small fenced yard and garden areas, plus permeable paving and designated bike racks. Practical building systems include central air, a passenger elevator, heated garage parking with deeded spaces, and dedicated storage rooms; the association is professionally managed and reports healthy reserves. Located in Somerville’s Union Square near both Inman and Central Squares, the building sits within easy walking distance of shops, restaurants, and the future Union Square Green Line stop, supporting a transit- and pedestrian-oriented lifestyle.