Mice in a basement suite: a Metro Vancouver tenant's playbook

Why basement suites are mouse magnets

Basement suites concentrate three risk factors in one space: low elevation (mice work at floor level), proximity to crawlspace and foundation gaps (the most common rodent entry points in Metro Vancouver), and shared HVAC or plumbing penetrations with the main house (pathways for mice that started upstairs). A basement suite in a 1960s Burnaby ranch or a pre-war Vancouver craftsman almost always has 4-8 rodent-accessible entry points — most of which the tenant cannot see, much less seal.

Your rights under BC's Residential Tenancy Act

Section 32 of the BC RTA requires landlords to maintain rental property in a state of repair that complies with health, safety, and housing standards. Pest infestations driven by structural conditions (gaps, aged construction, shared envelope) fall under this requirement. The landlord must address the issue at their cost. Tenants are responsible only for infestations they directly caused — for example, a bed bug brought in via luggage. Mice almost never fall into the tenant-caused category.

The 48-hour playbook

Document with photos and a written log: every dropping site, every sighting, every chewed item. Date and time-stamp each photo. Write a 2-3 sentence summary of what you observed and where.
Send a written request to your landlord (email or text — keep written record) describing the issue and asking for treatment. Be specific: 'mouse droppings in kitchen, behind stove, found 2026-05-08, requesting professional pest control inspection.'
Save all communications. The Residential Tenancy Branch needs paper trails, not memory.
If landlord doesn't respond within 7 days, send a follow-up referencing RTA Section 32. If still no response within another 7 days, file a Notice of Dispute with the Residential Tenancy Branch.
In the meantime, deploy basic interior measures: snap traps in droppings areas, seal interior gaps with steel wool plus foam, store food in glass or rigid plastic. These are tenant-side actions; structural sealing remains the landlord's responsibility.

Frequently asked questions

Can my landlord blame me for the mice?+

Only if you genuinely caused them — for example, by leaving food in such a way that you actively attracted them, or by having direct evidence (transported, brought in from a previous home). For 99% of mouse infestations in Metro Vancouver basement suites, the cause is structural and predates the tenancy.

Can I withhold rent until they treat?+

No. Withholding rent puts you in breach of the tenancy agreement and gives the landlord cause to evict. The legal mechanism is to file with the Residential Tenancy Branch for an order of compliance, possibly seeking a rent reduction for diminished use of the suite.

What if I caught the mice myself but they keep coming back?+

That confirms the issue is structural — entry points are open and being recolonised. The fix has to come from sealing, which is the landlord's responsibility. Document the pattern and include in your written request: 'tenant has trapped X mice over Y weeks; recurrence indicates structural entry points requiring exclusion work.'

Will pest treatment force me out of my suite?+

Not for mice. Treatment is interior trap and bait stations plus exterior structural sealing — no chemical fogging or whole-suite displacement required. Mouse-control treatments are pet- and kid-safe once stations are in place.

When the landlord delays: RTB escalation

The Residential Tenancy Branch's dispute resolution process is free and can be initiated online. A tenant seeking an order requiring the landlord to perform repairs (including pest control) files a Notice of Dispute (RTB-12 form). Processing times vary but an urgent hearing for health and habitability concerns can be scheduled within 3-6 weeks. Arbitrators can order specific remedies (pest control treatment, exclusion work) and may award a rent reduction for the period the suite was below the maintenance standard. Keep your paper trail: dated photos, all written communications, and any statements from neighbours about shared rodent activity.

Practical short-term measures while you wait

You can't perform structural exclusion on property you don't own, but you can reduce attractants and manage the interior population while waiting for the landlord to act. Store all food in glass or rigid plastic containers — cardboard cereal boxes and soft plastic bags are mouse snacks. Deploy snap traps along the wall behind the stove and refrigerator, baited with peanut butter, and check daily. Use steel wool to loosely fill visible gaps inside the suite (under-sink pipe penetrations, gaps at the base of kitchen cabinets where pipes enter). These measures won't eliminate an established infestation — that requires structural work — but they reduce daily contact and limit secondary nesting inside the suite itself.

Also relevant: basement suites in Metro Vancouver are subject to the same municipal pest-management bylaws as the main house. If your landlord is also receiving a municipal notice about rodent activity (Vancouver, Burnaby, and Surrey all have rodent-complaint processes that trigger property-owner obligations), that notice may accelerate their response. You can file a complaint with your municipality's environmental health office independent of the RTB process — some tenants find the combined pressure from RTB escalation and a municipal health complaint produces faster results than either alone.