When you see those price declines in the future, remember that a present decline wipes out more past gain than it seems. Here’s a chart listing those percentages.
Eg. If prices decline 30% (column A), that takes out 40% of the prior appreciation (column B).
So in the extreme, say you bought a house in 1997 for $195,000 (rough median back then), and it is now worth $575,000. This is an increase of almost 200% or three fold. It would only take a market decrease of 66% to bring it back down to $195,000.
Using the professor’s chart of Median Single-Family home price: San Diego-Carlsbad-San Marcos, I calculated what percentage decrease would be needed to get the present median house of $575,000 back down to the median for past years. Assuming my math’s correct: