Technically, commercial activities in a rented apartment ARE generally restricted, either by zoning ordinances or lease terms. Residentially zoned areas genera

Technically, commercial activities in a rented apartment ARE generally restricted, either by zoning ordinances or lease terms. Residentially zoned areas generally do not allow 'business' to be conducted out of a home. Those ordinances are worded differently everywhere, so sometimes 'coding', where you don't have lots of foot traffic or visitors, is 'ok', and other times it's not allowed anyway. Just because it's unenforceable doesn't mean it's not against the law...