My kitchen has no real walls. Is this going to be a problem?
It depends partly where you live whether it is up to code or not. In Mass., for example, exterior bracing (plywood is required).

Where is the house? I could probably dig out the building codes for you.

As far as what to do? I'd call a lawyer if it isn't up to your city/county/state building code. You probably don't want to fight that battle yourself.