How much is a SoCal ADU?

[Jimmy Cooper]

Hey Gang! This seems like an appropriate question for the forums. 

How much do ADUs cost from start to finish? 

I think this question is dependent on a few factors. 1. Contractor 2. Local City Requirements 3. Time and Materials 

I recently asked a contractor friend what is a healthy estimate for an ADU, he said anywhere from 75k to 150k.

How does this compare to your experience?