What Is a Section 21 Notice?
A Section 21 notice is the legal mechanism landlords in England use to regain possession of their property from an assured shorthold tenancy (AST) without needing to prove fault by the tenant.
Despite being called a "no-fault" eviction, Section 21 has strict procedural requirements. Failing even one of them makes the notice invalid, meaning you cannot use it to apply to court for possession.
When Can You Serve a Section 21?
You can only serve a Section 21 notice if:
You cannot serve Section 21 within the first 4 months of a tenancy.
Compliance Preconditions
This is where most landlords go wrong. Before a Section 21 notice is valid, ALL of the following must be in place:
1. Gas Safety Certificate, Must be in date. A certificate that lapsed even one day invalidates your notice.
2. EPC, The tenant must have received a copy of a valid EPC before the tenancy started.
3. How to Rent guide, The current government How to Rent guide must have been provided to the tenant at the start of the tenancy.
4. Deposit protection, The deposit must be protected in a government-approved scheme, and the Prescribed Information must have been served.
5. EICR, A valid Electrical Installation Condition Report must exist and have been provided to the tenant.
If any of these are not in place, you cannot serve a valid Section 21, even if you address the issue afterwards.
How to Serve a Section 21
LetCompliance Section 21 Generator: Our tool checks your compliance status first, then pre-fills Form 6A with your property and tenancy details, reducing the risk of procedural errors.
Section 21 and the Renters Rights Act 2025
From 1 May 2026, new Section 21 notices cannot be served in England under the Renters Rights Act 2025. If you may need no-fault possession, plan with your solicitor well before that date. Until then, Section 21 remains available only if every precondition in this guide is satisfied.
For common reasons Section 21 notices failed in court (relevant to any served before 1 May 2026), see our Section 21 guide.
Checklist Before You Serve
If any box is unchecked, fix it before serving, or the notice may be worthless at court.
7 reasons Section 21 notices are invalid (most common failures)
Courts reject Section 21 notices for a small set of recurring reasons. Understanding them before you serve is the only reliable protection.
1. Lapsed Gas Safety Certificate
If the annual Gas Safety (CP12) certificate was out of date on the date you served, the notice is defective. There is no cure — you must renew, serve a fresh copy, and then serve a new notice.
2. EICR not provided
An Electrical Installation Condition Report must be in date and a copy given to the tenant. Without evidence of service, courts routinely reject notices.
3. Deposit not protected or Prescribed Information missing
If you protected the deposit late, or failed to serve Prescribed Information within 30 days of receipt, you cannot serve Section 21 until the deposit is returned in full or a court order satisfies the penalty (seek legal advice).
4. How to Rent booklet not given
You must give the current edition of the government's "How to Rent" guide at the start of the tenancy and again when a new edition is issued during the tenancy. Serving an out-of-date version counts as non-service.
5. Notice period too short
For most periodic ASTs the minimum notice period is 2 months. Fixed-term tenancies ending early may have different requirements. Check the exact expiry and allow the full period.
6. Wrong form used
Only Form 6A (or its equivalent for the relevant tenancy date) is valid in England. Using an old version, a letter, or a general notice is not sufficient.
7. Section 21 "retaliatory eviction" defence
If the council has served an improvement notice or the tenant complained in writing about disrepair in the past 6 months, courts may treat a subsequent Section 21 as retaliatory and refuse possession. Maintain the property proactively.
How to serve correctly:
Use LetCompliance to track all preconditions and generate a compliant Section 21 draft →
📝 Free — Section 21 → Section 8 Transition Map (2026)
Section 21 was abolished on 1 May 2026. Map every active S21 / Form 6A scenario onto a valid Section 8 ground with this 2-page transition guide.
- Pre-1 May 2026 Form 6A — still valid? Decision tree
- Map every S21 trigger to a Section 8 mandatory / discretionary ground
- Ground 8 (rent arrears) — 13-week threshold under RRA 2025
- Top 5 evidence packs courts now expect for possession
Frequently asked questions
Is Section 21 still available for UK landlords?
Until 1 May 2026 (Renters Rights Act 2025), Section 21 may still be used in England if all preconditions are met. After that date, new no-fault notices are abolished, use Section 8 grounds and seek legal advice.
What invalidates a Section 21 notice most often?
Common failures include lapsed Gas Safety, missing EICR or EPC provision, deposit not protected or Prescribed Information not served, and wrong Form 6A or notice period.
How much notice must a Section 21 give the tenant?
A Section 21 notice must give the tenant at least 2 months to leave. If the tenancy is periodic and rent is paid more than monthly, the notice must align with a rental period. Always double-check the expiry date against the tenancy start.
Can I serve Section 21 by email?
Only if the tenancy agreement expressly permits service by email. Otherwise serve in person or by first-class post to the property (or another address specified in the tenancy). Keep proof of service — a dated photograph, tracking receipt, or certificate of service from a process server.
Related UK landlord guides
More on Section 21
- Section 8 Grounds 2026: The Complete RRA Matrix (Mandatory vs Discretionary + Notice Periods)
- Periodic Tenancy Conversion 2026: RRA Landlord Guide (1 May 2026 Automatic Change Explained)
- How long does it take to evict a tenant in England in 2026? (Real court + bailiff timescales)
- Section 13 Rent Increase Walkthrough 2026 (Form 4 Step-by-Step)
