The NAR's index of pending home sales rose 11.4 percent in the Midwest, 4.3 percent in the South, 3.4 percent in the Northeast and 3.1 percent in the West.
The U.S. housing market is looking strong despite a sharp rise in mortgage rates since the presidential election. The average on a benchmark 30-year fixed rate loan was 4.23 percent last week, up from 3.54 percent the week before the Nov. 8 vote.
Investors bid up rates in part out of expectation that President Donald Trump's plans to cut taxes and increase spending on defense and infrastructure would raise economic growth and inflation.
The Realtors reported last week that sales of existing homes fell in February after having surged in January to the fastest pace in a decade. Sales were still up solidly from a year earlier.
The supply of homes for sale is tight and is helping to drive prices up and affordability down. The number of listings for sale has tumbled 6.4 percent over the past year to 1.75 million homes last month, up only slightly from a record low in January.
The supply of homes for sale has fallen on an annual basis for the past 21 months.