Greenhouse, but I'm thinking a little more broadly in its use.like building it on the slope of a Montana mountain and looking up at the roof/ceiling to watch the snow fall in Winter and endless constellations in Summer.
Most people want a beautiful garden of their own in their house, but this dream may not come true because there's no space for a backyard. Some people are fortunate enough to have a rooftop which can be turned to a dreaming garden.
nice chicken coop- all wire enclosed to be predator proof. Wire roof to keep the hawks out. Wire underground all around to keep "diggers" from going under. Also, provide a solid roof on part of the shelter for sun, rain, & winter snow protection