Legal Question in Real Estate Law in California

Re: landloard rights

You should contact the insurer of the rental premises and make a claim relative to this. The area of mold-related claims and liablility for personal injuries alleged to have been caused by mold (respiratory illnesses, etc.) is an emerging and disturbing area of liability for landlords. As it is considered a "health and safety" issue, you certainly cannot ignore it, even if you believe it is caused by your tenants themselves. By having your insurance company investigate and send out a claims adjuster, you will have a (somewhat) independent determination as to its cause/existence. I would recommend that you wait until this issue is resolved before you raise the rent. Good luck!