San Mateo & San Francisco have been alternating for the highest median house sales price in the Bay Area. In Q3, SF took first place.

Home Price Appreciation in the Most Expensive Markets of San Mateo & Santa Clara Counties

This next chart looks at estimated percentage appreciation since 2012 in the most expensive markets of the 2 counties. This graph does not delineate prices, which vary enormously, only percentage home price changes over time. According to this calculation, the last peak in prices occurred in the first half of 2018.

Bay Area Markets for Homes of $5 Million+ 

San Mateo is not one of the largest markets in the Bay Area by number of sales (see pie chart above), but it is the largest market for homes selling for $5,000,000 or more.

Market Seasonality: New Listings Coming on Market

The market is now deep into its seasonal plunge in activity, which hits its nadir in December.

Estimated Median Home Value Trends by City

The following charts reflect estimated calculations of median home price trends  since 1996 by an algorithm created for that purpose.  As always, these numbers should be considered very general approximations of prices in complex markets containing homes of widely varying size and quality.
Due to the large drop in interest rates since Q4 2018, and some declines in median house prices, housing affordability – the percentage of households able to afford a median priced home with 20% down and a loan at prevailing interest rates – has ticked up in recent quarters. 

Average Days on Market – County & City

Average Sales Price to Original List Price % County & City

Percentage of Listings Going into Contract in Quarter 

Price Reductions by Month – San Mateo County