You can go to the County Courthouse and research the deed to the house there. Your friend's deed should have the name of the previous owner, then you look up that owner to see who they bought the house from, and so on until you get back to the builder and/or first owner.
You can also research deaths from that county as well, most likely in the same room or one adjacent to it at the Courthouse. After you find the all the owners of the house, research the names in the deaths index. Don't forget to include possible relatives of the owners (such as children) whose names would not be listed on the deeds.
If you go to do this, prepare to spend some time there... Hope this helps!
KDogg