Largest single-family home in Springfield, "City of Homes" Built in 1879, 270 Maple Street—historically known as the Frederick Harris House and more recently as Valentine Mansion—is a remarkable 30-room historic estate spanning 11,102 square feet. The largest single-family home in Springfield’s “City of Homes,” it features a 40-foot grand ballroom, ornate floor-to-ceiling hand-carved fireplaces, 12 bedrooms, 6.5 bathrooms, and what may be the city’s finest residential view. Set on 1.6 acres, with two additional lots available, the property was built for banker Frederick Harris and social activist Emily Osborne, the home offers multiple primary suites—including a rare adjoining his-and-hers suite—coffered ceilings, six sets of pocket doors on the first floor alone, and exquisite original woodwork, tile, brass hardware, and metalwork. Energy-efficient mini-splits, stainless steel appliances, a nine-zone sprinkler system, ample parking—this property has it all.