The median price of previously owned San Diego homes rose steadily even as sales continued to slide in the year ending in March, the Greater San Diego Association of Realtors said Thursday.

The median sales price for a single-family home was up 7 percent, to $551,000, but sales volume fell 7 percent, to 1,885 homes. Condos townhome prices rose 4 percent, to $360,000 and sales were relatively flat, dipping 1 percent to 988.

Even as supply remained at two months’ worth, about a third of what is considered healthy, SDAR noted properties were closing at a slightly faster pace in March, at an average of 35 days.

The most expensive home sold in March was in Del Mar’s Beach Colony, for $10.8 million. It had three bedrooms, four baths and 1,840 square feet. It was built in 1990. SDAR also said one of the most expensive San Diego condos ever sold last month for $6.275 million. It was a three-bedroom, 4,400-square-foot penthouse downtown.