There's no design for the automation. It's a retrofit system, so doesn't really need one i understand.If your designer has drawn the plans for the home automation system and interface connections , there should be no problems for the electrician to follow that .
I think you are worrying over nothing , unless you do not trust the designer.
It is indeed my home. But, right now, i wish it weren't!Sorry I'm a bit confused , is this your home , or are you an Agent.