My prediction is a range of 20-50% nominally. In areas like La Jolla, RSF, etc. you will see the lowest drops. Let’s face facts, the richest people have only gotten richer in the past 6 years and can weather a storm like this and buy what they want. My mom lives in LJ and her neighbor’s house which is around 2500sf is in escrow for just under $3 million to an all cash buyer from RSF (weekend home). These people aren’t going anywhere.
Flipside are the shacks near Euclid in east San Diego that sold for $350k. Those buyers are dried up and those homes will fall over 50% most likely. Finally areas that I am looking aka Hillcrest, Mission Hills (maybe), North Park, Ocean Beach, Bay Park will probably fall 30% nominally.