Can I rent out a single family home as a duplex?

[Lindsay Broome]

My home has 3 bedrooms 2 baths in the main home, we also have an attached apartment on  the home.  The apartment is separated by a locked door, has it's own outside entrance, bedroom, bath, kitchen, etc.  We have used the apartment for some airbnb and some month to month renters, but are now thinking of doing long term renters in our entire home and moving.  

My question is, is this allowed? Can I rent my home out as a duplex, even if it's not technically a duplex?