The prices for Lots vary significantly in Aspen. The Core and West End lots are typcially smaller (roughly 2,500 sq ft+), while there are lots within the City Limits that are a few acres in size. The value is determined by many factors including buildable FAR, views, locations, amenities, etc.
I'd be happy to provide you with further information about vacant land price per foot, but perhaps it would be better to understand better the other parameters involved because it would be misleading to give you an average price per foot for a West Aspen Lot that is larger in size and can accomodate a 10,000 sq ft+ house if you are interested in a 3,000 sq ft West End Lot that allows for a 5,000 sq ft house.
BJ Adams & Company