The median price for a single family house sold in San Diego during July was $445,000, down by $5,000 from the June median, but up 6.6 percent from July 2013, according to Dataquick, the San Diego based real estate research firm.

Based on sales data for the six-county Southern California region, the median price house sold last month was $413,000, up 7.3 percent from July 2013.

But sales have been declining both locally and regionally, Dataquick said. In San Diego, total residential sales fell by 262 units from June, and 18.5 percent from one year earlier.

For the region, sales by 12.4 percent from July 2013, and have fallen on a year-over-year basis for 10 consecutive months.

Dataquick analyst Andrew LePage says housing costs for many potential buyers are out of reach, especially in today’s more conservative lending environment. “That’s not the only reason price appreciation is easing, but it’s one of the main ones,” LePage said.

The 20 percent plus price gains of a year ago aren’t likely to happen again unless there’s a surge of pent-up demand, triggered by more robust income growth, a loosening of mortgage credit or a big move in interest rates,” he said.

One positive sign for first-time homebuyers: cash buyers accounted to 24.5 percent of all regional purchases in July, the lowest level in about four years.