Moving between areas like Resident evil?

So just a quick question, how could I go about doing this?,
like Should I just make each area a new level that can go back and forth between the two?
or would I be better off doing like a teleport?

Mostly doing it as a learning experience, Something fun I guess.

Whats the reasoning behind it in your case? Keep in mind that Resident Evil did this due to limited amount of memory at the time

Player and world/enviro as 3D objects. Place fixed cameras as desired in the rooms. Switch current viewport into whichever camera as the player overlaps Trigger Volumes you’d have in the places of the scene you want the camera angle to change.
If your aim is a RE1-type mansion, UE4 could easily handled it in a single level.
Cheers.