Keeping in mind that all I did was add a roof, made the ceilings and walls taller, and added some decor, I found this house almost as-is (with these shots, just imagine this house as bare, lacking a ceiling, and shorter by 2 or 3 blocks height):
Entrance:
Looking Right After Entering:
Looking Left After Entering:
Next Room Right:
Next Room Left:
Down Pre-existing Stairs:
Twist In Stairs (Again, Pre-Existing):
2nd/Basement Floor (Pre-Existing):