Who Has to Deal with Pests — You or Your Landlord?

Pest problems in a rental home raise an immediate question: is this my problem to fix, or my landlord's?

In Montana, the answer is mostly straightforward — but it depends on what pest you have, how it got there, and whether you've put anything in writing.

Here's what you actually need to know.

The Short Answer

In Montana, landlords are legally required to keep rental properties free from pests and rodents. This falls under the state's warranty of habitability — the legal standard that says a rental home must be safe and livable.

That said, there are situations where responsibility shifts to the tenant. And the lease agreement can change things too.

What Montana Law Says

Montana's Residential Landlord and Tenant Act (Mont. Code Ann. § 70-24-303) requires landlords to maintain rental units in a habitable condition. That includes keeping the property free from vermin and rodents.

What this means in plain terms:

• If pests are present when you move in — that's the landlord's problem

• If pests develop through no fault of yours — generally still the landlord's problem

• If pests develop because of your actions — it may become your responsibility

For bed bugs specifically, Montana law is clear: landlords are required to pay for treatment unless the landlord can prove the tenant or the tenant's guest brought the bed bugs into the apartment. It is hard to prove that it is the tenant's fault in a multi-unit building.

For other pests — mice, cockroaches, ants — these fall under an implied warranty of habitability, meaning landlords are generally still required to address them, even if the law doesn't name every pest specifically.

One important detail: Montana landlords are required to keep rental units free from vermin and rodents, which includes extermination.

When Is It the Landlord's Responsibility?

The landlord is generally responsible when:

• The pest problem existed before you moved in — you shouldn't be inheriting someone else's infestation

• The problem is in a common area — hallways, laundry rooms, basements shared between units are the landlord's responsibility to maintain

• The infestation affects multiple units — if your neighbor has the same problem, it's almost certainly a building-wide issue the landlord must address

• You didn't cause it — pests that enter through structural gaps, aging building materials, or from adjacent units are not your fault

When Is It the Tenant's Responsibility?

Responsibility can shift to the tenant when:

• You caused the conditions — leaving food out consistently, not taking out garbage, or storing excessive clutter that creates pest harborage

• You brought the pest in — this is most relevant for bed bugs, which travel via luggage, used furniture, and clothing

• You ignored the problem — failing to report a pest issue promptly can complicate your position if the infestation grows

• Your lease specifies it — some leases include pest control clauses that assign responsibility to the tenant. Read yours carefully.
  

What Tenants Should Do

Step 1 — Notify your landlord in writing. This is the most important step. A text message or email is fine, but written notice is essential. The landlord gets 14 days after notice to fix the issue. Without written notice, there is no legal clock running.

Step 2 — Document everything. Take photos of the pest activity, droppings, entry points, or damage. Date them. This protects you if there's any dispute later about when the problem started or how long the landlord took to respond.

Step 3 — Keep the unit clean on your end. Even if the problem isn't your fault, maintaining cleanliness shows good faith and removes any argument that you contributed to the conditions.

Step 4 — Follow up if nothing happens. If 14 days pass and the landlord hasn't acted, you have the right to report the issue to local housing authorities. When a rental property falls below habitability standards, tenants have the right to report infractions to appropriate government authorities.

Step 5 — Don't withhold rent without legal advice. Some tenants assume they can stop paying rent until repairs are made. Montana law does have remedies for tenants in uninhabitable conditions, but the process has specific legal requirements. Consult Montana Law Help (montanalawhelp.org) before taking that step.

What Landlords Should Do

Respond within 14 days of written notice. This is the legal standard in Montana. Ignoring a tenant's written pest complaint is a housing violation — and if the infestation grows in the meantime, so does your liability.

Hire a licensed pest control professional. DIY pest control in a rental unit is rarely sufficient and creates documentation problems. A licensed professional provides a treatment record, which protects you if there's ever a dispute about whether treatment was performed.

Address the root cause, not just the symptom. A one-time treatment without fixing the entry points — gaps in the foundation, failed window seals, deteriorating soffits — means the problem comes back. Landlords who treat repeatedly without doing exclusion work end up paying more over time.

Don't retaliate. It is illegal in Montana to retaliate against tenants who exercise their legal rights, such as reporting substandard living conditions. Landlords are barred from implementing retaliatory rent increases, reducing services, or threatening eviction in response to tenants' lawful complaints.

What About the Lease Agreement?

Your lease may include pest control language. It's worth reading it before a problem develops.

Some leases assign routine pest prevention to the tenant — things like keeping the unit clean and reporting issues promptly. This is generally enforceable.

What a lease cannot do: Leases cannot require tenants to pay repair costs that are the landlord's responsibility by law. If a landlord writes into a lease that the tenant is always responsible for pest control regardless of cause, that clause may not hold up legally.

When in doubt, get advice from Montana Law Help (montanalawhelp.org) — a free legal resource for Montana renters.

How Montana Pest Solutions Works with Renters and Landlords

We work with both. Whether you're a tenant who needs documentation of a pest problem, or a landlord who needs a licensed professional to treat and record the work, we can help.

We provide written service records with every job — which is useful for both parties if questions come up later.

Call 406-830-8752 or request a quote online.

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