Mould and Indoor Air Quality: Tenant Rights in New Brunswick

Special Tenancy Situations New Brunswick 4 min read · published March 09, 2026 Flag of New Brunswick

Living with mould or poor indoor air quality can affect health and comfort. If you are a tenant in New Brunswick, you have rights to a safe, habitable rental and to prompt repairs; landlords also have legal responsibilities. This article explains what mould is, common causes in rental homes, how to document problems, and practical steps renters can take—from requesting repairs in writing to escalating concerns to the provincial tenancy tribunal. You will learn which official forms and provincial contacts to use, what evidence helps a complaint, and how timelines and inspections typically work. The guidance is focused on everyday tenants and renters, using clear examples so you can protect your health and your rights in New Brunswick.

What mould is and why indoor air quality matters

Mould grows where moisture and organic material meet: under sinks, around windows, in basements and in HVAC systems. For renters, even small mould problems can worsen over time and affect people with allergies, asthma or weakened immune systems. Addressing mould early reduces health risks and repair costs.

In most regions, tenants are entitled to basic habitability standards.

Who is responsible in New Brunswick?

In New Brunswick, landlords are generally responsible for maintaining a rental in a habitable condition and for making necessary repairs. Tenants must keep the unit reasonably clean and report problems promptly. If a repair is needed because of normal wear or building issues (for example, a leaking roof or faulty plumbing), the landlord should arrange the repair.

Detailed documentation increases your chances of success in disputes.

Documenting mould and indoor air problems

Good evidence helps resolve issues faster. Keep all records and gather clear photos and notes that show dates, locations and steps you took to report the problem.

  • Take dated photos and videos showing mould growth and affected areas.
  • Keep a written log of symptoms, odors, and when problems appear or worsen.
  • Send repair requests in writing (email or text) and save copies of each message.
  • Keep receipts for any out-of-pocket expenses related to temporary fixes or health visits.
Keep all rent receipts organized and stored safely.

How to request repairs and typical timelines

Follow a clear, written process so both you and the landlord have a record. If the landlord does not respond, you may need to escalate to the provincial tribunal.

  • Report the problem to your landlord in writing, describing the location and severity and requesting a repair.
  • Allow reasonable time for the landlord to arrange repairs; state a desired response time in your message.
  • Cooperate with reasonable entry requests for inspection or repairs while protecting your privacy.
  • If the landlord does not act, follow up and set a clear deadline before filing a complaint with the tribunal [1] or citing the Residential Tenancies Act [2].
Respond to legal notices within deadlines to avoid losing rights.
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Filing a complaint with the Residential Tenancies Tribunal

If repairs are not completed or if mould persists, tenants can file an application with the Residential Tenancies Tribunal for New Brunswick [1]. Typical official steps include completing the tribunal application form, attaching your evidence (photos, correspondence, receipts, medical notes if relevant), and paying any required fee. The tribunal reviews applications, may schedule a hearing or mediation, and can order repairs or rent adjustments where justified.

Official forms and guidance are available from the province; use the specific application form and follow the filing instructions on the government forms page [3]. For example, a tenant might file an "Application to the Residential Tenancies Tribunal" after 14 days of failed written requests, attaching photos and a repair log to show a pattern.

Always include dates and copies of written requests when filing a tribunal application.

Evidence that helps a complaint

  • Photos and videos with timestamps showing affected areas and spread of mould.
  • Copies of written repair requests, replies, and any inspection reports.
  • Receipts for medical visits, cleaning, or temporary remediation paid by the tenant.
  • Independent assessments or reports from qualified professionals, if available.

FAQ

Can my landlord evict me for reporting mould?
No. Retaliatory eviction for reporting health and safety issues is generally prohibited; if you believe eviction or harassment is retaliation, document it and raise it with the tribunal.
What if the landlord says the mould is my fault?
If the landlord claims tenant-caused damage, gather evidence to show the cause or pre-existing conditions and explain any ventilation or building issues that may be responsible.
Can I withhold rent until the mould is fixed?
Do not withhold rent without legal advice; instead, document requests for repair and file an application with the tribunal so an adjudicator can order rent abatement if appropriate.

How-To

  1. Write and date a clear repair request to your landlord describing the mould location and health concerns, and keep a copy.
  2. Gather evidence: take photos, keep a symptom log, and save any related receipts or medical notes.
  3. Allow access for inspection and repairs while documenting who attended and when.
  4. If the landlord does not act within your stated deadline, prepare an application for the Residential Tenancies Tribunal [1] with all evidence attached.
  5. Attend any hearing or mediation, present your evidence clearly, and follow tribunal directions for repairs or compensation.

Key Takeaways

  • Document mould problems right away with photos and written requests.
  • Give the landlord a reasonable deadline, then escalate if needed.
  • Use the tribunal application and official forms when repairs are not made.

Help and Support / Resources


  1. [1] Residential Tenancies Tribunal - Government of New Brunswick
  2. [2] Residential Tenancies Act and legislation - Government of New Brunswick
  3. [3] Tribunal forms and filing instructions - Government of New Brunswick

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Marie Dubois
Marie Dubois

Bilingual Housing Rights Advisor, Tenant Rights Canada

Marie covers tenant rights across Quebec and the Atlantic provinces in both English and French. With a background in Quebec civil law and residential tenancy, she is a trusted voice on the Tribunal administratif du logement process and francophone tenant rights.