Does anyone know if i need a permit for a greenhouse in butte countyhttp://envirotechgreenhouse.com/image/cache/data/greenhouse/750-CF-1100-004-750x506.jpg
If you live in an unincorporated part of Butte, you need to look up the county ordinances and zoning laws. Generally this can be found online through the county website. If you live in an incorporated city within Butte, you need to look at the city ordinances and zoning laws.
Either way, nobody here will have that answer for you except those in Butte, and the only way to find out is to do the leg work yourself or pay someone else to. You could also go down to the city/county office and just ask...
Chances are if there are any regulations it will be zoning and greenhouse size dependent. Like anything over 20 ft tall and 1,000 sq ft needs a permit, everything under is fine.