I have a hard time understanding why homeowner plumbing is more serious than electrical. A fire is a lot more dangerous than a flooded basement.
The only person I have ever heard of around here who got busted for "no permit" was a neighbor who built a shed his neighbor thought was ugly. They made him either come up with engineering or tear it down. He tore it down but he left the pile of lumber in his yard for a year right next to the guy's yard who complained.
The whiner moved away.
