Illegal subletting: Is your tenant is illegally subletting your property?

Subletting without permission (illegal subletting) is one of the more common lease breaches landlords encounter, and one of the easier ones to miss. A tenant who sublets illegally transfers occupation of the property to a third party without notifying or obtaining consent from the landlord, in breach of the terms of their lease or tenancy agreement. Beyond the legal implications, unauthorised subletting can affect insurance validity, create liability issues, and complicate eviction if the arrangement becomes entrenched.

Signs a tenant may be subletting without permission:

• Mail addressed to multiple names not on the tenancy agreement
• Frequent visitor activity or unfamiliar people coming and going regularly
• The named tenant is rarely or never present during property inspections
• Utility bills or council tax showing additional occupants
• Neighbours reporting unknown individuals living at the property
• The tenant is uncontactable but the property is clearly occupied
• Social media listings advertising the property for short-term let

Unless you have stated in your tenancy agreement that your tenant may sublet all or part of the property, subletting without your permission is against the law.

There are many reasons why a landlord may not want their tenants to sublet. When a tenant sublets the landlord loses control over who is using their property, putting it more at risk of damage.

Illegal subletting can also cause overcrowding, resulting in complaints from neighbours and sometimes even anti-social behaviour or illegal activity.

Discovering that your tenant is subletting your property without your permission can be a pain, but there are laws in place to protect you.

Leasing all or part of the property without your consent is an illegal breach of contract. When a tenant breaches their contract, you are entitled to take legal action, which may include evicting them from your property.

What to do if you suspect your tenant is subletting

Confirm your suspicions

Before taking any action, confirm that the people living in your property are in fact renting it and aren’t house-sitting or friend or relatives staying at the property.

Gideon Reichental

Vacant Property Security Consultant
Clearway

Gideon Reichental

Illegal subletting is one of the harder issues for landlords to spot early, because on the surface the property still looks occupied and rent is often still being paid. It usually only comes to light through a proper inspection, which is why regular checks matter even when there's no obvious cause for concern.

Contact your tenant

Once you are confident that the property is being sublet, contact your original tenant to discuss the situation and notify them of their breach of contract. Getting in contact may be more difficult if it is the whole of the property that is being sublet and your original tenant is no longer at the address. In this instance, the new tenant should be able to provide you with some contact details.

Notify your tenant in writing of their breach of contract

Issue your tenant with a letter notifying them that they have breached their contract and giving them a set period of time to rectify the period. The letter should also state what action you will take if the problem is not fixed within this timeframe.

If the tenant does not cooperate, seek expert help

If your tenant has breached their contract, then you may be able to start legal action to evict them and any other tenants they’ve sublet to from your property. Following the correct legal process is essential when evicting tenants so it’s a good idea to seek professional help before acting.

Speak to our team of experts about evicting tenants from your property by calling us for free advice.

Written by Gideon Reichental

Vacant Property Security Consultant

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Gideon is an experienced property specialist with almost ten years dedicated to the field of vacant property security and services. With a strong commitment to customer service and operational support, he has built extensive expertise in protecting vulnerable and unoccupied buildings through practical, risk-based security solutions.

His experience includes directly managing portfolios of more than 200 vacant properties, alongside senior management responsibility for wider portfolios exceeding 2,000 properties. This has given him a detailed understanding of the challenges involved in securing vacant assets, from preventing trespass, theft, vandalism, and arson to helping clients maintain compliance, reduce liability, and protect long-term property value.

Gideon has strong technical knowledge of the measures used to secure vacant properties, including steel security screens and doors, monitored alarm systems, CCTV, mobile response, site inspections, and temporary fire and life safety solutions. At Clearway, he supports the delivery of tailored protection strategies designed around the specific risk profile of each property, helping clients secure and manage unoccupied assets with confidence.