Realtors are not the best people to answer this question for you. You need to talk to a general contractors. Between $190-250 PER square foot.
You need to be hooked up with the right people too, as there are certain rules when doing a tear down, whereas certain costs can be less, if you are able to do a rebuild by leaving UP at least 1-2 original walls vs. a complete & total tear down.
If you would like to shoot me an email directly or give me a call, I can set you up a team of people, you could get quotes from. This would be a general contractor, an architect & a combination of handyman/builder, electrical/plumber etc.
I know reputable home builders, I know reputable "owner // builder" teams.
I DO NOT look back on this same Trulia thread for answers by other agents or Replies from you. Shoot me an email directly or give me a call, if you'd like to discuss this further.
Emily S. Knell
Realtor Since--- 1996
Realty ONE Group