In Somerville, 51 condos and single-family homes sold through the month of February, according to figures from the The Warren Group, publisher of Banker & Tradesman.

That's nearly double the amount of homes that sold in the first two months of 2011, when 26 condos and single-family homes sold in Somerville.

The largest jump has come from condo sales. There were 43 condo sales through February this year, compared to 21 during that period last year.

Of the condos sold this year, 26 were sold in the month of February alone (compared to 9 sold in February of last year).

The figures do not reflect the number of two-and three-family homes in Somerville, which, together, represent about 51 percent of the housing stock in the city, according to numbers from a 2011 tax assessors report.

Condos represent about 28 percent of the housing stock and single-family homes represent about 16 percent, according to that report.

How does this compare?

Across the state, the sale of single-family homes and condos increased by 12.7 percent through February.

In 2011, home sales were down in Somerville, but most of that drop came from the first half of the year, and some real estate agents blamed last winter's harsh weather.