Really depends on where you are in America. Places with lots of urban sprawl - especially the farther you are from the city center - are quite inexpensive (figure maybe $250k ballpark for a 3-4 BR on a quarter acre?). But in high density/demand areas with strict zoning rules, the sky is the limit. For a fixer upper 3BR with considerably less land, I would probably need well in excess of $1m, and my area isn't even that exclusive.
Blame building restrictions.