Diving my land for investment purposes

[Lily Gonzalez]

I purchased a home with addition home mainly a car garage with one bedroom and a bathroom. We’re thinking of making additions to that house perhaps to rent out. However, the electric is being shared between the two homes so I don’t know if I need to separate that? Also, once we complete the home, do I need to let the state know, so anything that was added can be recorded on the taxes or should I separate the land? Any advice would be appreciated thank you.