Mortgage rates are one of several factors that impact how much you can afford if you're buying a home in the Boston area. When rates are low, they help you get more house for your money. Within the last year, mortgage rates have hit the lowest point ever recorded, and they've hovered in the historic-low territory. But even over the past few weeks, rates have started to rise. This past week, the average 30-year fixed rate was 3.14%.