HI, I am renting a tree house in the Hollywood Hills in L.A and there are rats at night in the garden that made they way into the wall of the house. Basically the house is build against the hill so there is a concrete wall against the hill side, then the pipes and the wooden wall of the inside of the house. The rats are between the concrete wall and wood, walking on the pipes and eating the wooden walls to get to the inside of the house. The problem is that the wooden walls have some vertical openings in some places where if I shed the light from my flashlight, I can see the rat behind the wall walking on the pipe! So they fleas can probably enter inside the house through those openings and also pee, so I think it makes this home unsanitary. I am on a month to month basis, and if sometimes I can't pay my rent, my landlord waits patiently sometimes up to 4 months but she knows that I'll always pay. So I think that because I know that, I can pass on the rat issue. There is also a sewer gas problem from the bathroom. That too she doesn't do anything despite me telling her many times that it is unsanitary. Just before moving in there 4 years ago, I asked her what should I know about the house instead of discovering whatever later? She said nothing of course, that everything is fine. Her house is next to mine on the same land and she lives with the same rat problems except that her wall are not wood but concrete so rat fleas cannot pass through it and infect us like I suspect it did. So for her it's sort of a normal situation. I now that she doesn't suffer from sewer smell inside the house like us. I know that if my husband and I push her too often into doing something about it, she'll just give me a 30 days notice to live and she will move on to the next renter who doesn't know anything about it. My husband has he's business in the house and moving away would be a problem at least for the next year and a half. What can I do? Thanks for any help!