The basics of zoning come down to county or city, but this building happened to be zoned commercial (it’s attached to a taco restaurant) but surrounded by various support services buildings. There’s a veterans place along the same alley road.
But zoning determines the safety expectations of a building, as well as several other things (noise allowances, vehicles, etc).
Yes there is technically church zoning for tax purposes. I guess I misspoke saying “it’s not even a church”. These two used to run a church service from their home, but then they bought that commercial space, as many churches do in rural places. My point was this isn’t what your brain imagines when you say church, it’s a warehouse space that was converted. So definitely not structured for residential safety, which is different than commercial