California May Set Statewide 'Granny Flat' Standards
"The original law, which went into effect July 1, requires local agencies to routinely approve applications for second dwellings without public hearings if the new structures meet local guidelines. But because some local governments enacted guidelines so stringent they essentially banned second dwellings, backers say a new bill is needed to impose reasonable standards statewide. For instance, the new bill would set a minimum size of 600 square feet for second dwellings, open occupancy to non-family members and allow the units to be rented."
Thanks to Chris Steins