Lot Size
50% of houses in the USA are suburban and growing.
http://www.pbs.org/fmc/book/1population6.htm
Average Lot sizes range from .14 to .75 acres in the USA.
http://mynorthwest.com/800/2375024/New-home-lot-size-State-average-lowest-in-nation
Half an acre is plenty for evolutionary neosubsistence.