Rats in an apartment can quickly create a serious health and housing problem. If you are asking who is responsible for rats, landlord or tenant, the answer usually depends on what caused the infestation, where the rats are coming from, and what your lease and local housing rules require.
Your rights often come down to habitability. The landlord must keep the unit safe, sanitary, and fit to live in.
When rats are tied to building defects, common areas, or poor maintenance, the landlord usually has to fix the problem. If your own sanitation or lease violations created the conditions, you may share some of the cost.

When The Landlord Is Usually Responsible
If rats come from the building itself, the landlord typically must act. The landlord arranges professional pest control, hires a licensed pest control provider or exterminator, and makes repairs to stop the entry points.
A rodent infestation tied to the structure or shared parts of the property is a pest problem the landlord must address under the implied warranty of habitability.

Building Defects And Entry Points
If rats get in through holes, broken vents, damaged pipes, loose baseboards, or gaps around doors and windows, that is usually a habitability issue. Landlords generally seal openings and repair defects that let rodents in, as noted in guidance on landlord pest duties.
Common Areas And Multi-Unit Buildings
In apartments, rats often move through basements, trash areas, hallways, and utility spaces. When the problem starts in a shared area, the landlord usually has control over that space, so responsibility shifts toward them.
Professional Treatment And Ongoing Repairs
A one-time exterminator visit may not solve the problem if the building still has access points or ongoing food sources. The landlord may need repeated treatment, follow-up inspections, and repairs to stop the rodents from returning, especially when the issue affects multiple units.
When The Tenant May Be Liable
You may be responsible when the problem is linked to your own conduct inside the unit. Clean living habits, proper food storage, and quick cleanup reduce the chance that rats will stay and spread.
The key issues are sanitation, your tenant responsibilities, and whether your actions caused the rat droppings or attractants that made the infestation worse.

Sanitation Problems Inside The Unit
Leaving food out, piling trash, or ignoring spills can attract rats. If poor sanitation inside your unit created the infestation, the landlord may still need to address the building, while you may be charged for the part tied to your conduct.
Lease Duties And Tenant Responsibilities
Your lease may require you to keep the unit clean, report pests quickly, and avoid actions that invite rodents. Even so, a lease usually cannot erase the landlord’s duty to fix structural problems or violations of housing law.
How Shared Fault Can Affect Costs
Sometimes both sides contribute to the problem. In that situation, responsibility for treatment costs may be split, especially if your actions worsened an existing issue and the landlord still had to repair the property.
How To Protect Yourself After Finding Rats
Act quickly and keep records. Strong documentation helps you prove the rats in apartment condition, show the timeline, and support your tenant rights if the problem turns into a habitability issue.
Take photos, save messages, and write down every report you make, including any rat droppings you find.

Document The Infestation In Writing
Send written notice to your landlord or property manager and keep a copy. Include dates, locations, photos, and any signs of activity, such as holes, gnaw marks, or droppings.
Request Repairs And Access For Treatment
Ask for both pest treatment and repairs to entry points. If you block access to the unit, the landlord may argue that treatment could not be completed, so offer reasonable times for inspections and extermination.
When To Contact The Health Department Or Housing Authorities
If your landlord ignores the issue or the infestation spreads, local health department or housing authorities may inspect the property. This becomes especially important when rats are in common areas, the problem is severe, or your landlord keeps missing repair deadlines.
What Happens If The Problem Is Not Fixed
If the landlord does not act, your options may expand, but the rules are strict. Remedies like repair-and-deduct, rent abatement, or rent withholding depend on state law, notice requirements, and whether the unit has become uninhabitable.
It helps to know the legal risk before you stop paying rent or hire repairs on your own.

Repair-And-Deduct And Repair And Deduct Rules
In some states, repair-and-deduct may let you pay for necessary pest control and subtract the cost from rent. The rules usually require written notice, a reasonable repair cost, and receipts.
Rent Abatement And Rent Withholding Risks
If rats make part of the unit unusable, rent abatement may reduce what you owe. Withhold rent only if your state allows it and you follow the required steps, since rent withholding without the right procedure can lead to late fees or eviction claims.
Constructive Eviction and Housing Court Options
If the infestation becomes severe and the landlord still refuses to fix it, you may have to move out because the home is unsafe.
Constructive eviction may apply in this situation.
You can also file in housing court to seek repairs, rent relief, or other remedies related to the rat problem.