Renting a room where it is not allowed

[Laura Simmons]

My boyfriend (who lives in the house he owns) wants to rent a room to one tenant in his house In Upper Darby PA (Delco). He is looking for the tenant online and will do a criminal background check and ask for paycheck stubs.

Upper Darby said renting a room is against township rules (we asked anonymously) but he is doing it anyway to help with $7k property taxes.

Could he get in trouble somehow? Could this affect his homeowners’ insurance? (The mortgage is paid off.)