J.F.
Hi!
I have a couple of recommendations for you although you may already know about them. The first is Bentley School. The lower school is in Berkeley but the Upper School is in lafayette (they are also planning on moving the middle school to lafayette in a few years). I assume they have a bus that goes onto the Berkeley campus from the East Bay. My kids have attended the Upper School and the teachers are wonderful. They also are addressing the issue of learning disabilities, even at the Upper School.
other options include Doris Eaton (a bit more formal probably) and Seven Hills which lots of my sons's friends attended and everybody loved it.
Hope that helps.
J. F.