A locked shopfront, an unpaid rent demand or a landlord’s notice can place a business under immediate pressure. This guide to commercial lease disputes explains how NSW tenants and landlords can protect their position before a disagreement becomes an expensive fight. The right response is rarely to send an angry email or stop paying rent. It is to identify the lease obligations, preserve the evidence and act with purpose.
Commercial premises are often central to a business’s ability to trade. A dispute can affect stock, staff, customers, cash flow and the value built over years of work. That is why early, decisive legal advice matters. Justice. Excellence. Dedication. Those principles matter just as much in a lease dispute as they do in a courtroom.
What causes commercial lease disputes?
Most commercial lease disputes begin with a gap between what one party believes was agreed and what the signed documents actually require. The lease is the starting point, but it may not be the only relevant document. Side letters, emails, disclosure statements, rent review notices, fit-out approvals and variations can all affect the position.
Rent arrears are the most obvious source of conflict. A tenant may be struggling after a downturn, construction works or a loss of trade, while a landlord may need the rental income to meet their own obligations. But a demand for rent is not automatically the end of the analysis. The amount claimed must be correct, the due date must be clear, and any interest, outgoings or other charges must be authorised by the lease.
Other common disputes concern repairs and maintenance. The question is often not whether a defect exists, but who bears responsibility for it. A tenant may be responsible for damage caused by its use of the premises, while structural repairs, essential services or pre-existing defects may sit with the landlord. The exact wording matters. So does the condition report, the age of the building and any notice previously given about the problem.
Disputes also arise over rent reviews, make-good obligations, permitted use, options to renew, access, redevelopment and unauthorised alterations. For retail premises, additional protections may apply under NSW retail leasing laws. Whether a lease is retail or purely commercial can materially change the available rights and process.
A guide to commercial lease disputes: act before rights are lost
The first task is to read the lease as a working legal document, not as a broad statement of intent. Focus on the clauses dealing with default, notices, termination, rent review, repairs, insurance, assignments and dispute resolution. A single notice provision can determine whether a demand was validly served. A single option clause can determine whether a valuable right to remain at the premises has expired.
Do not assume a verbal understanding will defeat a written lease. It may be relevant, particularly where there has been a consistent course of dealing, but proving it can be difficult. If the landlord has accepted late rent for months, for example, that does not necessarily remove their right to enforce the lease later. Equally, a landlord cannot simply ignore its own obligations because a tenant has raised a complaint.
Preserve documents immediately. Keep the original lease, all variations, invoices, payment records, photographs, messages and notes of conversations. If the issue involves water ingress, unsafe conditions or a failure of essential services, take dated photographs and arrange independent reports where appropriate. If it involves turnover rent or outgoings, gather the accounts and calculations rather than relying on assumptions.
The facts should be set out in a chronology. What happened, when did it happen, who was told, and what was the response? A clear chronology often exposes whether there has been a breach, whether it was remedied, and whether either party has acted unreasonably.
Respond properly to a breach notice
A breach notice should never be ignored. It may require payment, rectification or compliance within a defined period. Missing that deadline can expose a tenant to termination action, re-entry or a claim for loss. Yet immediate payment or acceptance of blame is not always the safest course either, particularly where the amount is disputed or the notice is defective.
The sensible approach depends on the lease and the facts. Sometimes the priority is to remedy the breach promptly while reserving the right to challenge the amount later. In other cases, a firm written response is needed because the alleged breach has no basis or the landlord is failing to meet a condition necessary for the tenant’s occupation.
Landlords also need to proceed carefully. Terminating a lease or changing locks without the contractual and legal basis to do so can create serious exposure. A landlord may face a claim for wrongful termination, lost profits or other damage. Commercial pressure is not a substitute for following the proper process.
Negotiation is strongest when the legal position is clear
Many lease disputes can be resolved without a final hearing. That does not mean being passive. Productive negotiation is backed by evidence, accurate calculations and a clear understanding of the consequences if the matter is not resolved.
For a tenant, a practical settlement might involve a payment plan, a temporary rent concession, repairs by a fixed date, an agreed surrender, or an extension of time to exercise an option. For a landlord, it may mean recovering arrears without the delay and uncertainty of vacant premises, reletting costs and litigation. Neither side should confuse compromise with weakness. A commercially sound resolution can protect more value than a lengthy dispute.
Put any agreement in writing. Informal arrangements are a frequent cause of the next dispute. The document should state what is being paid or done, by when, whether rights are reserved, and what happens if a party does not comply. If the agreement changes rent, term, repairs or the use of the premises, it should be drafted with the lease and any statutory requirements in mind.
When mediation or litigation becomes necessary
If direct negotiations fail, mediation can give both parties a controlled forum to test a settlement. In NSW, the appropriate pathway may depend on whether the premises are covered by retail leasing legislation, the amount in dispute and the remedy sought. The NSW Small Business Commission may be relevant to some leasing disputes, while courts or tribunals may have jurisdiction in others.
Mediation is not always suitable. If a party is threatening immediate eviction, withholding essential access, dissipating assets or refusing to engage honestly, urgent court action may be necessary. Litigation can also be required where the dispute turns on a point of lease construction, the validity of termination, substantial arrears or a claim for damages.
Before commencing proceedings, a lawyer should assess more than who is morally right. The key questions include what the lease says, whether notices were valid, what evidence exists, how quickly relief is needed, the likely legal costs, and whether the other party can satisfy a judgment. Black letter law matters, but so does the commercial reality.
Avoid the mistakes that weaken good cases
The most damaging error is self-help. Tenants sometimes stop paying rent because they believe the landlord has failed to repair something. Landlords sometimes restrict access to force payment. These actions may feel justified, but they can turn a manageable dispute into a serious breach.
Another mistake is allowing the dispute to be conducted entirely by phone calls. A conversation may be useful, but follow it with a concise written record. Confirm what was discussed, what was agreed and what remains disputed. This protects both the legal position and the prospect of a sensible resolution.
Finally, do not wait for a termination date, an option deadline or a court document before seeking advice. Delay can narrow the available remedies. It can also make the other side’s version of events harder to challenge.
A commercial lease should support a business, not become the reason it cannot trade. If your premises, income or ability to operate is at risk, obtain advice early, keep the evidence close and insist on a response that protects your rights as firmly as the situation requires.

