Last Updated: March 2026 | Audited by The PCC Research Team
Discovering a rat or mouse infestation in your rental property is stressful, but arguing with a landlord over who has to pay for the exterminator makes it worse.
In California, the law is very clear about pest control in rental units. Under the Implied Warranty of Habitability, your landlord is legally obligated to provide a safe, pest-free home. Here is exactly what the law states and how to hold a negligent property manager accountable.
California Civil Code Section 1941.1
While many tenants have heard of “AB 551” (which specifically governs bed bugs), rodent and vector infestations fall under the broader, highly enforceable California Civil Code Section 1941.1.
This law dictates that for a dwelling to be considered legally “tenantable” (livable), the landlord must ensure the building and its grounds are free from “debris, filth, rubbish, garbage, rodents, and vermin.”
| When the Landlord Pays | When the Tenant Pays |
|---|---|
| The rodents entered through structural defects (broken crawlspace vents, missing roof tiles, unsealed plumbing gaps). | The tenant created a severe sanitation issue (leaving garbage out, hoarding, leaving pet food unsealed on the floor). |
| The infestation is present in the common areas or multiple units of an apartment complex. | The tenant brought the rodents in themselves (e.g., through infested moving boxes or furniture). |
| The property was infested prior to the tenant signing the lease and moving in. | The tenant explicitly refuses to allow a licensed exterminator entry to the unit to perform treatments. |
If your landlord ignores a severe rat problem, do not simply stop paying rent. Under California law, this can still result in a legal eviction against you. If you intend to hire your own exterminator and deduct the cost from your rent, you must strictly follow the legal procedures outlined in the “Repair and Deduct” statute (Civil Code 1942), which requires written notice and a reasonable wait time.
Steps to Take if Your Landlord Refuses to Act
If you have a roof rat tearing up the attic or mice running through the kitchen, and your landlord claims “pest control is the tenant’s responsibility,” follow these steps:
- Send Formal Written Notice: Send an email and a certified letter to the landlord documenting the infestation. Include photos of droppings, chewed food, or entry points. A text message is often not considered sufficient legal notice.
- Allow “Reasonable Time”: California law requires you to give the landlord a “reasonable” amount of time to fix the issue—typically 30 days, but severe rodent infestations posing an immediate health threat (like chewed electrical wiring) justify a much shorter window.
- Call Code Enforcement: If the landlord ignores your written notice, call your local county health department or building code enforcement agency. They can inspect the property and issue a legally binding citation to the landlord.
- Hire an Exterminator for an Inspection Report: Many landlords will dismiss a tenant’s claims but cannot dismiss a formal WDO (Wood Destroying Organisms/Pest) report from an SPCB-licensed exterminator outlining the structural entry points.
Breaking the Lease (Constructive Eviction)
If the infestation is so severe that the unit is no longer safe to live in (e.g., massive amounts of feces, dead rat odors in the walls, or disease risks), and the landlord refuses to remedy the structural defects, you may have grounds for “Constructive Eviction.” This legal doctrine allows you to break your lease without penalty because the landlord failed to uphold their end of the contract by providing a habitable home.
Get Proof of the Infestation
If you need documented proof that the rodents are entering through structural defects the landlord failed to maintain, hire a licensed California exterminator to perform a formal inspection.
Find a Licensed Exterminator →