My question involves landlord-tenant law in the State of: California
My friend and I moved to Sacramento mid-July. I got us an apartment with the lease only in my name as he hadn't found work yet and the plan was once he found work to add him to the lease. While he looked for work I covered all expenses, rent, utilities and miscellaneous items like toilet paper, groceries, etc. We had agreed that rent and utilities would be split 50/50 and that once he found work he would pay me back for the expenses. 4 weeks after we moved here he got a job and his entire first paycheck with the exception of about 40-50$ went to me for bills. On September 4th we got into an argument, 10 days later he moved all of his belongings out with the exception of his bed, tv stand, tv, fan, suitcases and one bag of clothes. I have since asked for him to sign or give me a 30 day notice, return of my keys and what his plans for repayment are. Because he moved out he feels that he doesn't owe me anything so in regards to the money it looks like we will be going to small claims court. With that though, I'm not sure how far I can charge with rent as he has still yet to give me an official notice (though I am counting the day he moved his belongings as the beginning of his 30 day notice). My question is when can I change the locks on my apartment as he won't give me a date as to when he will get the rest of his belongings? I believe he plans on leaving his stuff here till January when his new living situation gets a new house and he has a place to put it. I just don't feel comfortable being his storage and him having access to my apartment when we are not on good terms. I am getting ready to write up a property abandonment letter but even with that I have to give him a deadline 15-18 days out to reclaim his property and I want to change the locks much sooner than that.

