When it comes to doing things on your property that are out of ordinary, a lot depends on your neighbors. If no one makes any complaints, you won't run into any troubles most likely.
However if your neighbors, and these maybe be few streets over, do start making complaints, you can be sure that the busy bodies in the city hall will find an ordinance that will give them leverage over you. And in most cases, a generic "concern to public safety" is more than enough, when no ordinance is found. They may even put your house under surveillance.
These are extreme cases of course, but it can happen if other people don't like what you are doing.
In other words, you may not be breaking any laws or ordinances, but if people in your community don't like what you're doing and make complaints, the city will put pressure on you to stop the activity.