The basic standard for “livable”
An apartment is legally uninhabitable in California when it has serious problems that make it unsafe or unhealthy to live in and the landlord has not fixed them. California law expects every rental to meet a basic standard called the implied warranty of habitability — the automatic promise that your home will be fit to live in.
Common examples include no heat or hot water, major leaks, broken plumbing or sewage backups, dangerous electrical wiring, serious rodent or insect infestations, broken locks or windows, and mold from unrepaired water damage. One small flaw usually is not enough on its own — the condition has to affect your health or safety. Several smaller problems can add up to a serious one.
What often matters most is whether you told your landlord about the problem and gave them a reasonable chance to fix it. If you are living with conditions like these, a free, confidential review can help you understand your options.
This is general information about California tenant rights, not legal advice. Every situation is different.