What to do when your tenant illegally sublets your property

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Landlord guide · Subletting

By Winfred Quek, Associate Marketing Consultant · CEA R073319H · Crestbrick Pte Ltd (L31010886H) · Published 13 July 2026

Facts verified: 13 July 2026 · Lease enforcement processes reflect general Singapore practice and can vary by agreement · Sources attributed below

Most landlords discover unauthorised subletting by accident, a neighbour mentions unfamiliar faces, a delivery arrives for someone whose name is not on the lease, or a routine check reveals more people living in the unit than the tenancy agreement allows. The instinct is often to feel a mix of anger and uncertainty about what you can actually do. The good news is that this is one of the more clearly defined breaches in Singapore tenancy practice. The process to address it is well trodden, provided you follow it in the right order.

Confirming it is actually happening

Before acting, separate suspicion from confirmation. Signs worth taking seriously include unfamiliar occupants who are not named on the tenancy agreement, mail or parcels addressed to people you do not recognise, a spike in utility usage inconsistent with the household size on the lease, complaints from neighbours or the managing agent about additional occupants, or your original tenant becoming difficult to reach while someone else appears to be managing the unit day to day.

None of these alone proves illegal subletting. A visiting relative, a short stay guest, or a temporary arrangement while the tenant travels can look similar from the outside. Where possible, communicate directly with your tenant first and ask for clarification, in writing, before assuming the worst. This both confirms the facts and creates a paper trail of when you first raised the concern, which matters if the situation later escalates.

What your tenancy agreement actually gives you

Most standard tenancy agreements used in Singapore include a clause prohibiting the tenant from subletting, assigning, or otherwise parting with possession of the property, in whole or in part, without the landlord's prior written consent. If your agreement includes this clause, and most do, an unauthorised sublet is a straightforward breach of contract. The specific remedies available to you, whether you can terminate immediately, must give notice to remedy first, or need to follow a set procedure, depend on the exact wording of your agreement, so this is the first document to pull out and read carefully rather than act on memory or assumption.

If your agreement is silent or ambiguous on subletting, or you used an informal template without this clause, your position is weaker and you may need to rely on broader contract principles or negotiate a resolution directly with the tenant. This is exactly the kind of gap I flag in my tenancy agreement clauses guide, since a missing subletting clause is one of the more consequential omissions a landlord can make.

The right sequence of action

1. Document what you have found. Photographs, correspondence, witness accounts from neighbours or the managing agent, and any admission from the tenant all strengthen your position if the matter escalates.
2. Serve written notice of the breach. Reference the specific clause of the tenancy agreement that has been breached and set out what you require, typically that the unauthorised occupants vacate and the tenant confirm compliance with the agreement going forward.
3. Give the tenant an opportunity to remedy, if your agreement provides for it. Many agreements require a notice period before further action can be taken, and following this exactly protects your position if you later need to terminate.
4. Escalate to termination if the breach continues. Where the agreement allows termination for an unremedied breach, follow that process precisely, including any required notice period, before treating the tenancy as ended.
5. Seek legal advice if the tenant disputes the breach or will not vacate. Recovering possession of a property from an occupant who refuses to leave, even where you believe you are clearly in the right, generally requires a proper legal process rather than direct action.

HDB flats carry an extra layer

If the property is an HDB flat, subletting is governed not only by your tenancy agreement but by HDB's own statutory subletting rules, which require the flat owner to obtain HDB approval before subletting the whole flat or individual bedrooms, and set eligibility conditions on who may be a subtenant. If you are the flat owner and your approved tenant has, in turn, sublet without your knowledge or HDB's approval, this is both a breach of your agreement with them and a breach of HDB's rules, and can be reported to HDB directly as a separate track alongside whatever action you take under the tenancy agreement. For the broader rules on what subletting is permitted and how approval works, see my HDB subletting rules guide and the distinction between renting a room versus a whole unit in my subletting rooms versus whole unit guide.

When to bring in the Small Claims Tribunal or a lawyer

Where the dispute is primarily financial, unpaid rent that accompanied the subletting, damage caused by unauthorised occupants, or a disputed security deposit deduction, the Small Claims Tribunals can be a faster and lower cost route than engaging a lawyer, provided the claim falls within its monetary jurisdiction. I cover how that process works in my landlord's Small Claims Tribunal guide. Where the issue is about recovering possession of the property itself and the tenant will not cooperate, that generally moves beyond what the Tribunal handles and into formal legal proceedings, at which point engaging a lawyer experienced in landlord tenant disputes is the sensible next step. My broader landlord eviction process guide walks through what that formal route looks like.

Reducing the chance it happens again

The most effective fix for illegal subletting is prevention, not enforcement after the fact. Screen tenants properly before signing, include a clear and specific subletting clause in every agreement, build in a right of periodic inspection with reasonable notice, and stay engaged enough with the property that changes in who is actually living there do not go unnoticed for months. None of this eliminates the risk entirely, but it shortens the window between a breach starting and you catching it, which is the single biggest factor in how cleanly the situation resolves.

Frequently asked questions

How do I know if my tenant has illegally sublet my property?

Common signs include unfamiliar occupants at the unit who are not on the tenancy agreement, mail or deliveries addressed to strangers, complaints from neighbours about different faces or more occupants than expected, a sudden jump in utility usage, or the original tenant becoming hard to reach while someone else appears to be living there. None of these confirm subletting on their own, but together they warrant a closer look.

What does my tenancy agreement usually say about subletting?

Most standard Singapore tenancy agreements include a clause prohibiting the tenant from subletting, assigning, or otherwise parting with possession of the property, in whole or in part, without the landlord's prior written consent. Subletting without that consent is a breach of the agreement, which typically gives the landlord grounds to serve notice and, if unresolved, terminate the tenancy.

Can I evict a tenant immediately for illegal subletting?

Not immediately in most cases. You generally need to follow the process set out in your tenancy agreement, which usually involves serving written notice of the breach and, if the agreement provides for it, a chance to remedy or a right for you to terminate after notice. Self help eviction, such as changing locks without following the proper process, exposes you to legal risk even where the tenant is clearly in breach.

Is illegal subletting different for an HDB flat versus private property?

Yes. HDB flats have specific statutory rules on subletting the whole flat or individual bedrooms, requiring HDB approval and eligibility checks on subtenants. An HDB tenant subletting without approval breaches both your tenancy agreement and HDB's rules, and can be reported to HDB directly in addition to whatever action you take under the tenancy agreement itself.

Can I keep the security deposit if the tenant sublet without permission?

This depends on your tenancy agreement's terms on deposit forfeiture for breach, and whether you can point to actual loss or costs arising from the unauthorised sublet. A deposit is not automatically forfeited simply because a breach occurred; the agreement and, if disputed, the Small Claims Tribunals will look at what loss the breach actually caused.

Related guides

• Subletting rooms versus a whole unit
• Condo short term rental enforcement
• The landlord eviction process
• The landlord's Small Claims Tribunal guide

Sources & References

• HDB · Renting a Flat and Subletting Rules
• State Courts of Singapore · Small Claims Tribunals
• Singapore Statutes Online · Small Claims Tribunals Act

Winfred Quek is Associate Marketing Consultant at Crestbrick Pte Ltd, advising Singapore upgraders, investors and families. CEA R073319H. The information on this page is general and does not constitute financial, investment, mortgage, or legal advice. Tenancy enforcement processes depend on the specific agreement and current law; verify all details with a qualified lawyer before taking action against a tenant.