I rent rooms out in the house I live in and own. I have month to month lease agreements with utilities included on 3 rooms.
I recently received an abnormally high electric bill, around $200 higher than the prior month. I noticed one newer roommate's behaviors to not be energy efficient. He works from home, has an AC in his room that he installed, his AC and the whole house AC are constantly on at a fairly high temperature, he was using the oven multiple times a day on hot days. I was thinking of changing his lease going forward to include 25% of the electric bill over a certain electric or gas value.
I wouldn't be charging the other tenants because they do not work from home and have some energy saving etiquette. Is it legal for me to make the described change to the non-energy efficient roommate's month to month lease and not the others? I live in the state of California. I appreciate any feed back.