Which Dept. Of local government. It's not the noise issue I'm talking about , it's which authority is responsible for policing the renting and hotel laws and licensing aspect.
If it is not taxable, the accountant does not show it on the pnd91 so the taxman wouldn't know about it,(only assessable income requires to be reported)
Only any assessible funds that you remit require a tax filing and if they are less than your tax threshold, you don't have to file but can if you want.(director of revenue ,Koh Samui, last week)