Another possible reason for the demand in the Del Sur area vs. purchasing homes on larger lots further east, is that some buyers (like some of our friends who purchased homes in CV in the last few years)prefer to live west of I-15.
At least this was one of the reasons they mentioned, and I’ve heard this from others as well. We’ve always lived west of I-15, but, again, that’s just personal preference, and, perhaps, that’s how the buyers at Del Sur feel. Just another possibility, as to why the demand is so high in the area.