House prices in the US edged higher in July, with a 0.8% average rise between June and July, and a 4.1% rise year-on-year in July, according to new figures from the S&P/Case-Shiller 10-city index.West Coast cities appear to be supporting the market, with San Fransico recording the biggest rise, at 11.2%, followed by San Diego, up 9.3%, and Los Angeles, up 7.5%.