Some answer before they read. It seems you live in your home, and have allowed a family of five to
share your home (with them living in one of your bedrooms as roomates). You do not even say if you are charing them any rent, let alone fair market value? You did not say if there is any rental agreement, either verbal or written.
There is information on this subject available online from local attorneys who are highly qualified.
Radio shows have covered similar situations. It would help you to do that research quickly.
You may not need to go through any legal process, and if you do, it will be different from a standard
landlord/tenant eviction dispute, because of the roomate relationship v. a standard tenancy.
It's important that you learn the law that applies to your case in Oakland. It doesn't matter what the
law is in Berkeley or S.F.. If the law is on your side, then you learn how to exercise it. If you feel
vulnerable, with your home being held hostage by this family of invited guests, it may even be less
expensive to pay them to go away? But you should not signal that to them in advance, or they may
simply hold out for more.
Getting the right legal advise is always important, unfortunately, too many of us don't get it in advance, and then end up wishing we had after it's too late.
BTW: Being a good Samaritan is something to be proud of, and not something to be scoffed at or
abused. Before you do the next favor, know this:
a) What the law says about what you are wanting to doing.
Oakland says it's illegal to house more than 2-3 people in one bedroom.
b) No matter how well deserving, no matter how nice the family is, if you haven't seen how
they lived in their previous residence (or car?), you may not enjoy them as house guests!
This is not legal advise.