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as long as it's a portable spa, at least here in the states you don't need a permit because all of the equipment is self contanied, in the eyes of the law the spa is an appliance no different from an ac unit or washer or dryer, which is why you don't need a fence around it. You do have to make sure you have a licensed/certified electrician to do the electrial and he takes care of any electrical permits/issues for you. at least that's how it is here in sunny san diego