If you have some particular zip codes in mind, go to sdlookup.com to get some idea of what’s currently available on the resale market, and the pricing.
Also, depending on your location of interest, there are some new communities around town you might want to check out.
The competition for housing is unlike anything we’ve seen in our lifetime in San Diego and in many other cities, so you might need some help from a realtor, and, even then, it may be a challege.