Well, the US is a strong federal state, so it depends on the level of government. At the national level, the US government is relatively hands-off compared to other places. At the local level, it depends on your local politics. In urban areas, you might have an HOA telling you whether or not you can have an AC unit. In rural areas there's almost certainly no HOA, and potentially not even a local municipal government at all, and could quite often be legal to put up a gun range in your back yard.