They won’t be changing the General Plan or the zoning for a parcel that already has a recorded subdivision map.
However, there’s nothing stopping a developer from drastically changing the design and quality of subsequent phases in a project. The only question is whether or not it’s profitable to do so. It hasn’t been profitable to do so during this economic cycle but I’ve seen where it has happened a few times during previous cycles. You’ll be driving down a street in a subdivision and all of a sudden you’ll see smaller and inferior quality homes that were built later in the cycle.
Seeing as how there have been a few subdivision site sales between builders, it wouldn’t surprise me to see a couple mixed neighborhoods spring up.
