If functionality, not beauty, is your objective, you can try a
lean to hoop house, some of which you can put up/take down seasonally. Unfortunately for me, I don't think zoning would let me get away with it in my suburban location. I recall bumping into a nice blog post somewhere about a lean to that some guy built...he had all the instructions, revisions, suggestions...I've wanted to build something like it off my south-facing doorwall to trap heat and decrease cold wind blowing into the house every time I let the dog out...which seems to transpire hourly ;-0