What Is a Section 21 Notice and How Does It Work?

A Section 21 notice is a key feature of housing law in England and Wales used by landlords to seek possession of a rented property without needing to give a reason. Historically known as a “no‑fault eviction notice”, it has been widely used in the private rented sector under the Housing Act 1988. This article explains what a Section 21 notice is, how it works, when it can be used, the legal requirements that apply, the practical eviction process, recent legislative changes, and what tenants and landlords need to understand before taking action.

What Is a Section 21 Notice?

A Section 21 notice is a formal document served by a landlord on a tenant who holds an Assured Shorthold Tenancy (AST). The notice informs the tenant that the landlord wants to recover possession of the property. It does not require the landlord to state a reason why they want the property back. This “no‑fault” basis was one of its principal characteristics.

Under current law, serving the notice is the first step in the eviction process; it does not end the tenancy on its own. The landlord must go on to apply to the county court for a possession order and, if granted, arrange for enforcement (for example by bailiffs) to legally remove the tenant if they do not leave voluntarily.

When Can a Section 21 Notice Be Used?

Section 21 notices apply only to Assured Shorthold Tenancies. Most private rentals in England and Wales are ASTs unless another specific tenancy type applies. If a tenancy is not an AST, a Section 21 notice served on the tenant will not be valid.

A Section 21 notice can be issued:

• After a fixed term ends if no new fixed term has been agreed.
• During a statutory periodic tenancy (a rolling tenancy after the fixed term expires).
• Where the tenancy agreement includes a break clause allowing termination during a fixed term.

Landlords cannot serve a Section 21 notice within the first four months of the original fixed term unless the contract expressly permits this.

Legal Requirements for a Valid Notice

For a Section 21 notice to be valid, a number of statutory requirements must be met:

Minimum Notice Period

The notice must provide at least two months' notice to the tenant before the landlord can proceed with court action. In some cases, where rental intervals are longer (for example quarterly rent), the notice period may need to match that interval if longer than two months.

Prescribed Form

The notice should be on prescribed form 6A (or contain the same information). The form sets out key dates and requirements. Notices not in the correct form may be invalid.

Pre‑Tenancy Formalities

For tenancies that began on or after 1 October 2015, landlords must have provided tenants with:

• A copy of the current gas safety certificate, if gas is supplied.
• A valid Energy Performance Certificate (EPC).
• A copy of the government's How to Rent guide.
• Proof that the tenancy deposit has been protected in an approved scheme with prescribed information given to the tenant.

Failing to satisfy these requirements will usually make the Section 21 notice invalid.

Licensing and Other Conditions

If the property requires a licence (for example, as a House in Multiple Occupation, HMO) and the landlord has not obtained one, the notice may also be invalid. Certain complaints or enforcement notices from the local authority can restrict the use of Section 21 in specific situations.

Serving the Notice

A Section 21 notice must be served on the tenant in writing and in a way that can be proven. This typically involves hand delivery, first‑class post, or another trackable delivery method. Notices cannot simply be communicated by phone, text or email if statutory requirements are unmet.

The notice will specify a date by which the tenant is expected to leave. That date must be at least two months after service, and the tenant does not have to leave on that date if they do not wish to do so. The tenancy continues until possession is obtained through the court process.

What Happens After a Notice Is Served?

Serving a Section 21 notice is not the end of the legal process:

1. Valid Notice Period Runs – The tenant has at least two months before court action can begin.
2. Court Application for Possession – If the tenant remains after the notice period, the landlord may apply for a possession order from the county court.
3. Possession Order and Enforcement – If the court grants a possession order, and the tenant still does not leave, the landlord can request a warrant for possession and instruct bailiffs to evict.

Tenants can raise defences if the notice was invalid or the landlord failed to comply with legal requirements. If a notice is invalid, the landlord will need to remedy the defects and serve a new valid notice to proceed.

Law Reform and Future Changes

Under the Renters' Rights Act 2025, Section 21 notices will be abolished for most tenancies in England from 1 May 2026. After that date, landlords in the private rented sector will no longer be able to use Section 21 to evict tenants without a reason; they will instead need to rely on notices such as Section 8, which require specific grounds (for example rent arrears or breach of tenancy terms).

For notices served before 1 May 2026, landlords still need to start court proceedings within statutory time limits (generally no later than 31 July 2026 or six months from service). Failure to do so may prevent enforcement under that notice.

Social landlords may continue to use Section 21 for a limited period beyond 2026, with abolition in the social rented sector due in 2027.

Practical Considerations for Tenants

Challenging Invalid Notices

If a tenant believes a Section 21 notice is invalid (for example due to missing safety certificates or deposit protection failures), they can challenge the notice in court and remain in the property until valid procedures are followed.

Staying After Notice Expiry

Tenants who do not vacate by the end of the notice period cannot be forcibly removed without a court possession order. A landlord's attempts to evict without a court order are unlawful.

Seeking Advice

Tenants served with a Section 21 notice may benefit from early advice from housing advice centres, councils, or solicitors to understand their rights, check validity and plan next steps.

Common Questions About Section 21 Notices

Does a Section 21 notice require a reason?
No. A Section 21 notice does not require the landlord to state a reason for wanting possession. It is a no‑fault notice, although this mechanism is being abolished.

Do tenants have to leave immediately after notice?
No. The tenancy remains in place until a possession order is granted by the court and enforced, even if the notice period has ended.

Can landlords serve Section 21 notices in the first four months?
Generally not, unless a break clause in the tenancy agreement provides for it.

Key Takeaways

A Section 21 notice has been a commonly used tool for landlords to regain possession of privately rented homes in England and Wales without specifying a reason. Valid use of the notice requires adherence to statutory formalities including minimum notice periods, prescribed forms, and key documentation. Serving the notice does not end a tenancy automatically; landlords must obtain a possession order through the courts. Tenants can challenge invalid notices and remain in occupation pending legal processes.

Significant reforms under the Renters' Rights Act will abolish most Section 21 notices from May 2026, requiring landlords to rely on other legal grounds for possession. Understanding the notice's requirements and process helps both tenants and landlords manage tenancies and disputes within the legal framework.