Ontario Commercial Maintenance Obligations: Landlord and Tenant Responsibilities

Commercial maintenance obligations in Ontario are determined almost entirely by the lease agreement. Unlike residential tenancies where the RTA imposes broad landlord maintenance duties, the Commercial Tenancies Act (CTA) provides minimal default rules — making the lease allocation of repair responsibilities the governing standard.

Disclaimer: This guide provides general legal information for educational purposes only and does not constitute legal advice. Always consult a licensed attorney in Ontario for guidance specific to your situation. Information last verified: March 2026.

How Maintenance Responsibilities Are Allocated

The allocation depends heavily on the lease type:

Landlord's Typical Maintenance Obligations

Even in NNN leases, landlords typically retain responsibility for:

Structural Elements

• Foundation and footings
• Load-bearing walls and columns
• Roof structure (not always the roof membrane/covering)
• Building envelope (exterior walls, structural components)

Base Building Systems

• HVAC core systems (major plant equipment, not tenant-specific units)
• Elevators and escalators
• Life safety systems (fire alarm, sprinkler systems, emergency lighting)
• Main electrical and plumbing risers

Common Areas

• Lobbies and corridors (cleaning, lighting, repairs)
• Parking lots and structures (paving, lighting, snow removal)
• Landscaping (grounds maintenance)
• Washrooms (if shared/common area)

Tenant's Typical Maintenance Obligations

Interior Maintenance

• Interior walls, floors, and ceilings within the leased premises
• Tenant-installed fixtures and improvements
• Interior lighting (bulbs, ballasts, fixtures)
• Interior doors and hardware
• Interior painting and decorating

Systems Within the Premises

• Tenant-specific HVAC units (rooftop units serving only their space)
• Plumbing fixtures within the premises
• Electrical panels and wiring within the premises
• Kitchen/washroom facilities within the premises

Specialized Equipment

• Grease traps (restaurant tenants)
• Exhaust systems (restaurant, industrial)
• Specialized electrical (data centres, laboratories)
• Signage (installation, maintenance, and removal)

Maintenance Standards and Compliance

Ontario Building Code

• All commercial buildings must comply with the Ontario Building Code (O. Reg. 332/12)
• The property owner (landlord) is ultimately responsible for building code compliance
• Tenants must ensure their improvements and alterations comply with the code
• Building permits are required for significant alterations

Fire Code

• The Ontario Fire Code (O. Reg. 213/07) requires:
  • Annual fire alarm testing and inspection
  • Regular sprinkler system maintenance
  • Proper fire exit signage and clear egress paths
  • Fire safety plans for certain building types

Accessibility (AODA)

• Common areas must meet Accessibility for Ontarians with Disabilities Act standards
• The landlord is typically responsible for common area accessibility
• Tenant spaces accessible to the public must also comply

Repair vs. Capital Replacement

A critical distinction in commercial leases:

Many leases include provisions for amortizing capital costs over their useful life and passing the annual amortized amount to tenants as an operating cost. This is a heavily negotiated area.

Tenant Remedies for Landlord Default

If the landlord fails to maintain areas under their responsibility:

1. Written notice — Formally notify the landlord of the deficiency
2. Cure periods — Allow the landlord the time specified in the lease to address the issue
3. Self-help — Some leases allow the tenant to make repairs and deduct costs from rent (only if explicitly permitted)
4. Rent abatement — If the premises become unusable due to landlord default
5. Court action — Seek specific performance or damages through the Superior Court

Best Practices for Ontario Commercial Landlords

1. Define maintenance responsibilities clearly — Ambiguity leads to costly disputes
2. Create a maintenance schedule — Preventive maintenance extends system life and reduces emergency costs
3. Budget for capital reserves — Plan for major system replacements
4. Conduct regular inspections — Annual or semi-annual property inspections with documentation
5. Keep detailed records — Maintenance logs, inspection reports, and contractor invoices
6. Comply with regulatory requirements — Building code, fire code, and AODA obligations

How Landager Helps

Landager helps commercial landlords schedule preventive maintenance, track repair requests, manage vendor relationships, and maintain compliance records across multiple properties — protecting your investment and keeping tenants satisfied.

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