Name: Big Bill Livonia Michigan (Zone 6a) If you need to relax, grow plants!!
An attached greenhouse on Long Island raised my taxes as it was considered a "permanent structure" The foundation had to be 36" in order to prevent frost heaving.
My first greenhouse was an 9 X 12' freestanding model. I installed it with a wooden foundation.Local ordinances considered it a "storage shed" and there weren't any new taxes involved.
Orchid lecturer, teacher and judge. Retired Wildlife Biologist. Supervisor of a nature preserve up until I retired.