For Proposition 19, if the house is in a trust that the beneficiaries can “share and share alike”, then the trustee can give the house to one sibling (the one who will live in the property) and give cash to the other siblings to avoid reassessment.
Or you can transfer the property before February 16, 2021; see https://blog.yonathan.org/posts/2020-11-proposition-19-paren...