The Massachusetts Association of Realtors (MAR) reported today that more homes were put under agreement in the month of May than in any month since January 2004, when the group began tracking this data. There were 9,075 single-family homes put under agreement last month, an increase of 83.6 percent, compared to 4,944 homes put under agreement in May 2012.

Condominium pending sales also hit their highest point in the nine years of tracking.

"May was a tipping point as increasing prices and interest rates pushed qualified buyers to make offers that sellers accepted in great numbers," 2013 MAR President Kimberly Allard-Moccia, broker-owner of Century 21 Professionals in Braintree, said in a statement. "However, we still need more homes on the market and hopefully this activity will spark potential sellers to list their homes to help meet the demand."

Last month was the first time that pending home sales went over the 9,000 home mark and the biggest monthly year-over-year increase ever recorded. On a month-to-month basis, single-family homes put under agreement were up 58 percent compared to 5,738 homes put under agreement in April 2013.

The number of condos put under agreement in May was up 63.2 percent compared to May 2012, to 3,469 units in 2013 from 2,126 units in 2012. This was the most condos to go under agreement since MAR began tracking this information. On a month-to-month basis, condos put under agreement went up 45 percent from 2,383 units in April 2013.