Adding a pre-fab studio

[Eli Altman]

Does anyone have experience adding pre-fab studios to backyards? I have a 2/1 property in North Oakland that's zoned for two dwellings. I have electricity and water already in the backyard and a sizeable cement pad. I've looked up the zoning laws and haven't found any deal breakers. I'm considering putting up a pre-fab studio and renting it our either as an airbnb or regular rental. I'm not far from Cal and the Bay Area has a housing shortage so I'm not too concerned about finding a renter. I am however very concerned about construction cost. 

Has anyone done this before? Any advice/assistance would be greatly appreciated!