You have to brew in a separate building. Some have gotten away with attached garages but it probably depends on the person/s you're dealing with. You also will probably need to do some minor construction to get the right plumbing and ventilation. It's a huge pain because you need to have your space ready months before you get inspected and can actually start brewing.
“… Besides, the Word is the principal part of baptism. If in an emergency there’s no water at hand, it doesn’t matter whether water or beer is used.” ~Martin Luther