Relocating a single household service panel
I had something this done at my old house. If I understand what you're saying you want what we would call the electrical meters to be moved which requires the electrical mains for the whole house to moved and made longer.

Our electrician simply put in a large junction box and added extra cable.  This is something I would think that a home handyman would not be permitted to do by himself.  Dealing with live mains wires that cannot be disconnected with a switch is dangerous when you're not trained.  Call in an expert and get them to advice and do the work.