Home prices in Contra Costa County were up 7.4% in September compared to last September with the median sold single-family home at $650,000, according to the California Association of Realtors. Prices up but sales down–17.3% year over year. The real estate market in East Bay is starting to slow, but everything is relative. In Lafayette, the number of days a home spent on the market in October was 20, compared to 16 in the spring.