Cost to demo a house for new construction

[Dan Slaughter]

How much is a rough estimate to demo an existing house to build new construction?  Existing house of a property we are considering needs so much work I think it would be more beneficial to completely demo and rebuild.  The value of the property is in the location with existing vacant lot asking prices in the same price range as the asking price of the house.  The existing house is approx. 2800 sf and is 2 story.  Is this a $25K event or a $100K event?