Sales of single-family homes in Waltham jumped last month, and prices fell.

That’s according to newly data released by the Warren Group this week.

Sales of condominium units, however, were flat, while prices for them increased, according to the data.

"After such a depressed year of sales in 2011, we're likely to see more positive year-over-year comparisons in months to come. The market has a good head of steam built up right now,” Warren Group CEO & President Timothy Warren said in a press statement.

Overall, Waltham had 23 home sales in March compared to March of last year, a 21.05 percent jump. To date, 56 homes have been sold compared to 41 at the same time last year, a 36.59 percent jump. The increasing trend mirrors the statewide increase in home sales.

Median prices for homes fell to $357,000, a 2.46 percent drop over March of last year. The figure is in line with the statewide drop in prices to $260,000. To date, medial home sale prices in Waltham have fallen by 5.69 percent to $340,000.

Sales of condo units in Waltham did not increase in March with 11 units being sold. To date, sales of units are down 5.88 percent to 32 compared to the same time last year. Statewide, however, condo sales were up by 11.4 percent.

Prices for condo units in Waltham fell to $295,000 last month, a 9.23 percent drop which opposes the 15 percent jump in prices statewide. To date, median prices for Waltham units are up by 8.21 percent to $302,450 compared to the same time last year.