I don't know about your location but here in Kootenai County, north Idaho, ANY structure covering more than 200 sq. ft. requires a building permit. This includes greenhouses / hoop houses. The county takes over 2 weeks to process the permit and folks are advised NOT to start any construction without the permit. Be advised ... and good luck.
Sam McMillan, old fart but still kickin'
We noticed he had no friends. So we gave him this tiny ad: