Greenhouse and taxes

There any chance Greenhouse could be separated structure wise from housing, so you could grow crops out of season and such without the extra taxing. Far as I can tell extra lot taxing seems to be based on structures on lot, so imagine if I wanted to grow crops myself to save on food costs like I imagine will be part point with cottage living, will tax eventually out weight the benefits I reap in making my own crops if I add Greenhouses? In other words if I don't grow all my crops outdoor.

Just something I thought would bring up maybe kit with fixed greenhouses in different sizes doesn't add to tax size growing would be nice, in case this would be the case growing crops inside building structures with windows like greenhouses with existing mechanic, but again have not tested this just thought would bring it up. See if anyone else knew or it was something worth discussion or adding feedback to now?

EDIT: Just tested it building 7x10 Greenhouse it took lot tax from 1000 roughly to about 1300.