“Looking at the Washington, D.C., region, they’ve calculated that moving from a Level 1 to a Level 2 walkable neighborhood (from a non-walkable place to a slightly less non-walkable one), you will wind up paying $301.76 a month more in rent for a similar home. If you’re really moving up in the world – from, say, that car-dependent exurb to a Georgetown flat – that means the premium to live in a walkable urban community may run you as much as $1,200 a month.”