New Eircode on workshop

I have a large workshop beside my home on the same site. I received a new eircode in the post for this. Is this a usual thing?

Have you a business address there? or separate power supply?

Yes. A separate power supply indeed. Do I send it back to them?

I've seen businesses on the eircode map with their own separate eircode numbers.

I wouldn't bother sending it back .... just don't use it.

Thank you