Is planning permission necessary to rebuild an identical structure?
Answers:
Yes. You will need planning permission. Sorry to be so blunt, but that's the way of it. Whilst, in your case the demolitions may come under the heading of Permitted Development, the replacement will not. And yes, you will need Building Regulations approval too.
By the way, permission for demolition is not only required when you are in a conservation area, or when the building is listed. There are other factors taken into account such as what you are actually demolishing.
Get professional advice.
Other answers:
Good question. Don't you need planning permission to demolish the old building?
Wouldn't it have come up then?
Good question. Don't you need planning permission to demolish the old building?
Wouldn't it have come up then?
yes, i think you will need the permission... for every new construction project and its phases there are strict inspections from building inspectors from the local council. In order for them to inspect, you need to submit building plans. If you dont, and you have a heritage or neighbourhood watch or council regarding construction and they complain at local authorities, you will have to stop building, face lawsuits, and often be required to take down the already illegally erected structure.
I would think so. But better consult your architect on that. Or ask the relevant local authorities.