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D&D Commercial Services · Practical guide

Commercial Lease Maintenance: Who Arranges Work and Who Pays?

For an Ontario commercial property, the starting point is the executed lease and its amendments. Ontario’s commercial-tenancy guidance says the Commercial Tenancies Act does not set out maintenance responsibilities. A generic landlord-versus-tenant table cannot replace the agreement.

By D&D Commercial Services · Updated September 9, 2026 · About 2 min read

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Illustrative photograph: Low brick office building with dark glazing, planted borders and a paved approach
Low brick office building with dark glazing, planted borders and a paved approach. Illustrative building photography. Sartori Holdings LLC · Unsplash License

Find the clauses that govern the particular asset

Review the definition of the premises, common areas, building structure and tenant improvements alongside the repair and replacement provisions. Locate the equipment on a plan where possible. A rooftop unit may serve one tenant even though it sits outside the leased interior; physical location alone does not settle responsibility.

Build a worksheet for each recurring task: asset, clause reference, person arranging service, person approving it, party paying and required evidence. Note unresolved boundaries such as the demising wall, ceiling plenum or slab instead of filling them with an assumed industry standard.

Separate maintenance duties from recoverable charges

The party arranging work may be different from the party ultimately charged for it. Read operating-cost and common-area-maintenance definitions, exclusions, allocation methods, reconciliation procedures and any caps together. The label net or triple net is not enough to determine a specific invoice.

Check how the agreement treats routine repairs, replacements, capital costs and tenant-caused damage. Do not assume capital items are always excluded or that a cap applies to every expense. Keep the scope, invoices and allocation explanation available for review; obtain legal interpretation where clauses conflict or remain unclear.

Use a documented process when equipment fails

For a reported failure, first identify any immediate safety or damage-control need and follow authorized emergency procedures. Then document the condition, relevant lease clauses, proposed investigation and spending approval. Responsibility disputes should not silently leave a dangerous area open.

Communicate any planned entry and disruption under the agreement and applicable requirements. Keep written confirmation of agreed work and distinguish a temporary arrangement from a permanent change to lease obligations.

If the parties disagree, gather the signed documents, prior amendments and factual service history for legal review. Avoid presenting a manager’s reading as a binding determination. A maintenance summary is most useful when both sides can trace it back to the actual agreement.

Technical references

Send a commercial maintenance requestDescribe the work before choosing a date or service scope.

Sources & References

D&D Commercial Services
D&D Commercial Services Property and service guidance

Service guidance from D&D Commercial Services. Discuss your property and the proposed scope with our team.

Include a preferred date and time

Send a commercial maintenance request

Describe the work area, site access and any operating hours the work must accommodate.

Prefer to send the details first? Request a quote or call (519) 501-5003.

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