Garage project help

[Kevin Del Valle]

Im planning on making my garage a 1 Bed/ 1Bath. Do I have to get any permit to make it happen? Is not a new construction, rather making it a liveable place, so I could rent it later on to at least cut my mortgage payment in half and be able to focus on other investments. 

I'm very new to all this, so apologies for my lack of knowledge. 

I live on a R-4 Zone in DeBary FL...if this helps.