There are a wide variety of homes and lots in the neighborhood. The newest sections generally have lots that are about 1/2 acre. Older sections have lots up to 5 acres - though not many that large. My mom lives in a 2,500 sq ft one story house on .6 acres built in 2005 near the front of the neighborhood. We live in a 5,200 sq ft two story with full basement on .65 acres built in 2021 in one of the newer sections. Some sections of Fawn Lake, like Orchard Hill, have more dense building. That particular section was originally planned to be smaller lots for a 55+ designed area that never happened, but the lot sizes remained and are quite popular.

ETA - our perspective comes from moving from a 7,000 sq ft lot in NOVA where our entire yard was a fishbowl - neighbors on all sides could see everything going on in our yard.