The number of single-family homes put under agreement in April in Massachusetts was up 25 percent compared to the same time last year, while condominiums were up 22 percent, according to the Massachusetts Association of Realtors (MAR). This marks the tenth straight month the number of both single-family homes and condominiums put under agreement had increased over the year before, MAR reported. "With the tax credit expiring at the end of the month, we were not surprised to see a big increase in the number of homes put under agreement in April," said MAR President Kevin Sears, broker/co-owner of Sears Real Estate in Springfield. "Pending sales activity in the next few months will give us a good indication of how stable the market is post tax credit." A total of 5,580 single-family homes went under agreement in April, up from 4,480 in April 2009. On a month-to-month basis, single-family homes put under agreement were up 16.1 percent from 4,808 homes in March. The number of condos put under agreement in April increased 22 percent to 2,292 from 1,878 in April 2009. On a month-to-month basis, condos put under agreement were up 8 percent from 2,122 units in March.