Do you have to do it from start to finish in that kitchen? Or can you bake there and prepare fillings, frostings and then do the rest at home? Any rules on this stuff??
I think it depends on your Health Dept regulations, so it varies by locale.
I think it probaby depends on your area, since the rules seem to be different everywhere. I know here (in Ontario in my county) the cake has to be done completely from start to finish....baked, filled, iced and completely decorated.
All of it
If you could finish at home....why not just do all of it at home. No.
As others have pointed out, it's really dependent upon your local and state food laws. Here, it's 100% has to be finished in the licensed kitchen. It's a PITA when you're paying for rental, but that's the other reason for really crunching the numbers to determine is a rental worth it or is having your own space rented or owned that you have 24/7 control over the more economical and your mental well-being..
100% of it where I live. I can't do any of it from home.