Tour of 171 Marsh St., Belmont, former home of Gov. Mitt Romney Tour of 171 Marsh St., Belmont, former home of 2012 presidential candidate and Massachusetts’s 70th governor, Mitt Romney. Joanna K. Tzouvelis, wickedlocal.com The median price for a single-family home in Massachusetts rose to $575,000 in February, a 4.9% increase from the previous year.