Zoning and building codes are usually totally separated. For example plenum cabling adherence is required in many localities for industrial, commercial and resi

Zoning and building codes are usually totally separated. For example plenum cabling adherence is required in many localities for industrial, commercial and residential zones regardless of income level. As for safety you of course don't want a chemical plant next to say an elementary school, but generally that kind of zoning is not what leads to what urban planners refer to as "exclusionary zoning."