Premium Cul-de-sac Lot, Priced to Sell!!! The Preserve at Bernardsville is a private neighborhood of 8 luxury home sites. A once in a lifetime opportunity to build your dream home on top of "the mountain". PROPERTY VIDEO in media section. This 10 acre home site is at the end of the Rosehill cul-de-sac. This premier lot has an expansive building site that is boarded by mature specimen trees. HOA for development.