The city's average condo sales price of $1.3 million was up 5 percent year-over-year, making it the highest figure in city history.
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This first quarter marked the ninth consecutive quarter in which the Mid-Peninsula's average sales price has topped $1.5 million.
Napa County was the only Bay Area County to see a year-over-year average sales price drop, as its $873,923 average sale was down 9 percent from Q1 2016.
Sonoma County sellers benefited hugely from being one of the most affordable Bay Area counties at a time when demand is at a premium.