Wow, I am really scared to continue with this builder now. This is a big local builder in Pittsburgh, they have ~ 30 communities and claim they are Pittsburgh's #1 custom home builder... I don't know if the footer of other homes they have built in the subdivision had forms and keyways. But I guess they are the same as ours. We met with them today and was told if we back out, our earnest money could not be returned ($20,000). so I guess we are screwed. Not sure if we have a case if we sue them. But we will have a structural engineer to look at it first. Again, thank you for your help