If I had a flat lot that was accesssble, I would look into this further.
In my town, even with the protections Gov. Neusome provided, getting an ADU is still a hassle.
In my town, rich people are using ADU's to add square footage to their existing houses. Some are actually successful with getting a variance, if they kiss enough ass. Or, know someone on that council, but I can't prove this alleviation now. I could a few years ago. Variances are over $1000, and until recently very few, like less than 1 percent, were granted. The town kept those fees though. Gotta keep those fees, and fines.
That said, it's still a rich man's game:
1. Council members go over every aspect of your ADU.
2. They even had the gall to ask an older homeowner whom will be living in the ADU. The guy said it would probally be a attendant, but felt he didn't need to discuss his medical history on tv. (San Anselmo tapes their meeting. I guess it's for litigation fend offs? If that's the case, they are not doing themself's any good. They are obviously biased.)
3. The town has a right to tell you what color paint your addition will be.
4. The town tells homeowners to go to their neighbors, and basically beg for their remodel.
5. The town can determine where you place windows.
6. The town can tell you what kind of roof they will approve.
7. The town can tell you what kind of siding to use. Better not use stucco, if they want wood?
8. The town can dictate what plants you use around unit.
(I'm conflating an ADU, and a remodel--a remodel usually requiring a variance. I'm not sure how difficult is is to just put in an ADU. If any town signed off on these modular units, they are quite a buy. I have my doubts.)