Tenant Subletting UK 2026 — Landlord Guide to Illegal Subletting & Lodgers

When can a tenant sublet?

A tenant's right to sublet depends on the tenancy agreement and statutory rules:

• Absolute prohibition (most common): Most AST agreements contain an absolute covenant against subletting — the tenant cannot sublet any part of the property without the landlord's written consent. Breach of this covenant is a ground for possession (Schedule 2, Ground 12 — breach of any term of the tenancy). This is the most common position
• Qualified covenant: Some tenancy agreements use a qualified prohibition — the tenant cannot sublet without the landlord's consent, but the landlord cannot unreasonably withhold that consent (Landlord and Tenant Act 1927, s.19). In practice, this is rarely used in residential ASTs — the absolute prohibition is more common and enforceable
• No subletting clause: Where a tenancy agreement is silent on subletting, a tenant of an assured tenancy has a statutory right to take in a lodger (Housing Act 1988, s.15) — but cannot sublet the whole property without consent. Without an express clause, subletting of part may depend on the nature of the tenancy and implied terms
• Statutory right to take a lodger: Section 15 of the Housing Act 1988 gives a tenant of an assured tenancy (including an AST) the right to take in a lodger, regardless of any prohibition in the tenancy agreement. A landlord cannot prevent their tenant from having a lodger. However, a lodger is not a subtenant — the distinction is critical
• Council or registered social landlord tenants: Secure tenants (council housing) and assured tenants of registered providers have different subletting rules — subletting the whole property without consent immediately ends the secure tenancy. These rules are outside the scope of this guide, which focuses on private rented sector ASTs

Subletting vs lodger — the key distinction

The legal distinction between a sublet and a lodger determines security of tenure:

• Lodger: A lodger occupies a room (or rooms) in the same property as the tenant, who retains their own occupation. The lodger uses the property as a licensee (not a tenant) and has no security of tenure — the tenant can end the lodger's arrangement by giving reasonable notice (typically the payment period). A lodger cannot be the subject of assured tenancy proceedings because they are a licensee
• Subtenant: A subtenant is granted a tenancy of part or all of the property by the original tenant. The subtenant has security of tenure under the Housing Act 1988 (if the conditions for an AST or assured tenancy are met). Even if the head landlord regains possession from the original tenant, the subtenant may have rights against the head landlord in certain circumstances (section 18 of the Housing Act 1988)
• How to tell the difference: A subtenant has exclusive possession of their accommodation — the tenant cannot enter their room without notice. A lodger does not have exclusive possession — the tenant can access the lodger's room. Exclusive possession is the hallmark of a tenancy, not a licence
• Airbnb guests — licensees: A tenant who lists the property on Airbnb grants guests a licence (not a tenancy) because the stays are short-term and the guest does not have exclusive possession for a period — the tenant retains control. Airbnb guests are not subtenants. However, the commercial subletting of the property without consent is still a breach of the tenancy agreement and potentially a planning breach
• Impact of subletting on mortgage: A head landlord's buy-to-let mortgage typically prohibits further subletting. Where a tenant sublets, the head landlord is in breach of their mortgage terms — the lender could treat this as a default. Landlords should address subletting breaches promptly to protect their mortgage position

Detecting unauthorised subletting

Landlords who suspect unauthorised subletting have several detection options:

• Property inspections: Regular property inspections (with proper notice — 24 hours in writing) allow the landlord to observe whether more people appear to be living at the property than permitted by the tenancy. Evidence includes extra bedding, personal items, or locked doors in what should be communal areas
• Council tax records: The local authority's council tax register lists the names of occupants. A landlord can request the information or the tenant can be asked to show a council tax bill. Unexplained additional names may indicate subletting
• Airbnb/platform listings: Searching short-term rental platforms for the property's address or comparing listing photographs with the property can confirm if the tenant is listing it commercially. Some platforms publish host contact details or reviews that can be traced
• Neighbour reports: Neighbours often notice frequent turnover of occupants or unusual numbers of people. Establishing a good relationship with neighbours and providing a contact number for concerns helps detect subletting and other tenancy breaches
• Electoral roll: Registered voters at the property are listed on the electoral register (open register). Additional names on the register that were not on the tenancy may indicate additional occupants. The full register is available to certain organisations including landlords through official channels
• Credit reference agencies: Some reference agencies allow address searches that reveal other individuals who have used the property address in credit applications — this can identify subtenants who have given the address as their own

Landlord remedies for illegal subletting

Where subletting is confirmed without consent, the landlord has several options:

• Written warning and request to cease: The first step is typically a formal written letter to the tenant confirming the subletting is a breach of the tenancy agreement, requiring them to remove the subtenant/guest and cease the subletting within a specified period (typically 14-28 days). This creates a paper trail and gives the tenant an opportunity to remedy the breach before legal action
• Ground 12 — breach of tenancy obligation: Under Schedule 2 of the Housing Act 1988, Ground 12 allows a landlord to claim possession where the tenant is in breach of any obligation of the tenancy. Subletting in breach of an absolute prohibition is a Ground 12 breach. Ground 12 is a discretionary ground — the court must consider it reasonable to make an order. A first breach that the tenant has been warned about and has not remedied strengthens the landlord's case
• Ground 17 — false statement to obtain tenancy: Where a tenant falsely stated they would occupy the property personally (when they intended to sublet from the outset), Ground 17 (misrepresentation) may apply. This is a discretionary ground
• Injunction: A landlord can apply to the County Court for an injunction requiring the tenant to remove the subtenant and cease subletting. An injunction is enforceable by contempt proceedings — more powerful than a possession claim but not always proportionate for first-time breaches
• Dealing with the subtenant: Where the head landlord has obtained a possession order against the original tenant, they can usually enforce it against occupants deriving title from the tenant (the subtenant). The court order naming the tenant and 'persons unknown' is the standard approach. The subtenant should be served with the possession proceedings
• Do not harass or change locks: Even where subletting is confirmed, the head landlord cannot evict the subtenant or the original tenant without a court order — to do so is illegal eviction. Changing locks, removing belongings, or cutting off utilities without a court order is a criminal offence under the Protection from Eviction Act 1977

Airbnb subletting by tenants — the specific problem

Short-term subletting via platforms creates compounded compliance risks:

• Breach of tenancy: A tenant who lists a rental property on Airbnb without consent is breaching the tenancy agreement (where there is an absolute prohibition on subletting). This applies even though Airbnb guests are technically licensees rather than subtenants — the commercial letting of the property to multiple third parties is a breach regardless of the precise legal characterisation
• Planning breach: As noted in the serviced accommodation guide, residential properties (C3 use class) used exclusively for short-term commercial letting require planning permission for change to C5 use (from January 2025). A tenant listing the property on Airbnb without planning permission is causing a planning breach — the landlord as the property owner bears the planning enforcement risk
• Insurance: The head landlord's buildings insurance policy typically excludes cover for Airbnb or commercial holiday letting activity. If a guest damages the property and the tenant has been subletting via Airbnb, the landlord's insurer may decline the claim on the basis of non-disclosure or breach of policy conditions
• Tenancy agreement clause: A well-drafted AST should specifically address short-term platform subletting. A clause prohibiting the tenant from listing the property on any short-term accommodation platform (Airbnb, Booking.com, Vrbo, Sykes) without written consent removes any ambiguity
• Airbnb income: A tenant who earns income from subletting via Airbnb is taxable on that income. The landlord has no obligation to account for the tenant's subletting income, but where the arrangement comes to light, HMRC may investigate the broader property tax position of all parties

Frequently asked questions