Can I rent out a "shed" in rural conservation area?

[Ken Swearengen]

I found a property with a 4 bedroom house and a 1 bedroom cottage. I'd like to live in the house and rent out the cottage; however currently the cottage is considered a "shed" by Baltimore county which I can only assume is for zoning purposes. It's in an RC 6 zone, so I'm concerned that I can't legally rent it out due to zoning restrictions but I'm having a hard time locating the information I need to determine that. Do I contact the Zoning department first to see if I can convert the shed into an accessory dwelling unit, or do I contact Rental Registration department first to see if I can rent out a livable "shed"?