The abolition of Section 21 under the Renters' Rights Act 2025 is the most significant change for landlords dealing with sitting tenants. Before May 2026, a landlord could serve a Section 21 notice to obtain possession without providing a reason. Now, possession from a sitting tenant requires one of the specific Section 8 grounds, most commonly Ground 1 (owner-occupation), Ground 1A (sale with vacant possession), or a mandatory rent arrears ground.
For investors buying at a discount and intending to hold the property long-term as a rental, a sitting tenant is rarely a problem, you simply become the new landlord. The challenge arises when you need vacant possession within a specific timeframe: county court timescales for contested cases mean 6 to 18 months from claim to possession is common in 2026.
| Arrangement | Security | How possession works |
|---|---|---|
| Periodic Assured Tenancy (post-RRA 2025) | Indefinite; binds the new owner | Section 8 ground plus a court order (Section 21 abolished) |
| Regulated tenancy (began before 15 Jan 1989, Rent Act 1977) | Highest — fair rent set by the Valuation Office | Rare; take specialist advice before buying |
| Licence / lodger | Not a sitting tenant in law | Reasonable notice, no court order |
| Company let | Not an assured tenancy | Governed by the contract terms |
A sale does not end a tenancy — the buyer steps into the seller’s shoes. What a sitting tenant is depends on the real occupation arrangement, not the label on the agreement.
What is a sitting tenant?
Understanding the legal nature of sitting tenancies is the starting point:
- A sitting tenant occupies a property under a legally protected tenancy at the time of sale. The tenancy binds the new owner, the tenant has the right to remain despite the change of landlord
- The most common form in 2026: a Periodic Assured Tenancy Agreement (under the Renters' Rights Act 2025). All previously fixed-term assured tenancies converted to periodic from 1 May 2026. The tenant has indefinite security of tenure unless a Section 8 ground applies
- Regulated tenants: some very long-term occupiers (with tenancies starting before 15 January 1989) may hold regulated tenancies under the Rent Act 1977. Regulated tenants have the highest level of security of tenure and rent set by the Valuation Office. These are rare but significant, seek specialist legal advice before purchasing any property with a pre-1989 tenancy
- Licensees: a lodger or occupier under a licence (not a tenancy) is not a sitting tenant in the legal sense. A licensee can be asked to leave with reasonable notice without a court order. The distinction between a tenancy and a licence depends on the actual occupation arrangement, not the label in the agreement
- Company lets: a company let (where the tenant is a corporate entity) is not an assured tenancy and is not subject to the Renters' Rights Act. The tenancy terms govern possession
Security of tenure, what a sitting tenant can and cannot be required to do
Post-RRA 2025, sitting tenants have stronger protection:
- Section 21 abolished (1 May 2026): the new owner cannot serve a Section 21 no-fault notice. The sitting tenant cannot be required to leave without a valid Section 8 ground, regardless of any agreement between buyer and seller about vacant possession
- Possession requires a court order: unless the tenant agrees to leave voluntarily (via mutual surrender), the landlord must obtain a possession order from the county court. This applies even where the tenancy was originally granted with an expectation of vacant possession on sale
- Section 8 grounds available to a new owner: Ground 1 (owner intends to use as principal home); Ground 1A (genuine intention to sell with vacant possession); Ground 8 (at least 3 months' rent arrears); and other grounds where applicable. Grounds 1 and 1A require 4 months' notice, Ground 8 requires 4 weeks
- The 12-month rule: Ground 1A (sale) requires that the tenancy began at least 12 months before the date given in the notice. The notice can be served earlier, as long as that date falls after the first 12 months. A new owner who purchased expecting quick vacant possession via Ground 1A may find the earliest possession date pushed back where the tenancy is recent
- Tenant's ability to challenge: the court must be satisfied that the stated ground genuinely applies. A tenant can challenge the landlord's stated intention to sell (for Ground 1A) or to occupy (for Ground 1)
Buying a property with a sitting tenant, due diligence
Thorough pre-purchase checks protect your investment:
- Obtain and read the tenancy agreement: confirm the tenancy type, start date, current rent, notice provisions, and any special clauses. There is no longer any requirement for a prior Ground 1 notice to have been served at the tenancy outset
- Deposit protection: confirm the deposit is protected in an approved scheme and that the prescribed information was served correctly. Unprotected deposits expose the new landlord to penalties of 1 to 3x the deposit amount and mean the court cannot make a possession order on any ground except Grounds 7A and 14 until the deposit is protected or returned
- Safety certificates: request current gas safety record (annual), EICR (5-yearly), and EPC (10-yearly, minimum rating E). As new landlord you take on the compliance obligation from day one
- Arrears history: ask the seller for a rent ledger. A tenant in persistent arrears is an immediate compliance issue. Check whether any Ground 8 (mandatory serious arrears, three months / 13 weeks) or discretionary Ground 10 or Ground 11 (arrears and persistent delay) notices have previously been served
- RRA Information Sheet: under the Renters' Rights Act 2025, landlords must provide tenants with the prescribed Information Sheet. Confirm whether the existing landlord has served this, if not, you must do so promptly after taking ownership
Valuation discounts and investment returns
The sitting tenant discount reflects the cost and time of recovering vacant possession:
- Typical discount range: properties with sitting tenants are typically offered at 10 to 30% below vacant possession value. The discount reflects: the time to recover possession (potentially 12 to 24 months or more); the rent differential if below market rate; and the uncertainty of any court proceedings
- Periodic tenancy at market rent: if the sitting tenant pays market rent and the new owner intends to hold as a long-term investment, the discount represents pure value, you are buying below market value with no void period
- Below market rent: if the tenant pays below market rate (common with long-established tenancies), factor the rent differential into your return calculations. Section 13 rent increases allow one increase per 12 months with 2 months' notice, you cannot increase immediately to market rate
- Cash for keys: offering the tenant a lump sum to vacate voluntarily (surrender by agreement) is often the fastest route to vacant possession. Costs of £2,000-£10,000 are common, typically far cheaper than 12 to 18 months of court proceedings. Document the surrender agreement carefully
- Finance: some mortgage lenders will not lend on properties with sitting tenants or impose conditions (e.g. maximum LTV restrictions or hold-backs pending vacant possession). Check lender requirements before exchange
Frequently asked questions
The seller told me the property comes with vacant possession on completion, but the tenant is still in. What are my rights?+
If the sale was contracted for vacant possession and the tenant is still in at completion, you have a breach of contract claim against the seller, not a ground to remove the tenant without a court order. The tenant's legal rights are unaffected by the contractual arrangements between buyer and seller. Your remedies are against the seller (damages, potential rescission). To recover possession from the tenant, you must use the standard Section 8 process. Take urgent legal advice from a property solicitor.
Can I use Ground 1A to sell the property with vacant possession immediately after purchase?+
Ground 1A requires that the tenancy began at least 12 months before the date given in the notice as the earliest date for proceedings. You can serve the notice sooner, but if the tenancy started recently that date cannot fall within its first 12 months. The 12-month period runs from the tenancy start date, not from your purchase. Check the tenancy start date before purchase and factor this into your completion and resale timeline.
The sitting tenant has not paid rent for several months. Can I take possession quickly?+
If the tenant has accumulated at least 3 months' rent arrears (assessed on the notice date and at the hearing date), Ground 8 is a mandatory ground, the court must grant possession if the arrears are proved. Ground 8 requires 4 weeks' notice on a Form 3A (since the RRA 2025). Even mandatory ground claims can face county court delays of several months from filing to hearing. Consider whether a surrender negotiation (cash for keys in exchange for the arrears being waived) might be faster and cheaper.
Do I need to re-serve the deposit prescribed information if I buy a property with a sitting tenant?+
As a general rule, the new landlord should re-serve prescribed information if there is any doubt about the adequacy of the original service, particularly if the original landlord failed to serve correctly or the deposit scheme details have changed. The safer course is to write to the tenant confirming their deposit remains protected (in the same or a new scheme), providing current scheme information and the prescribed information document. Failure to protect the deposit or serve prescribed information prevents the court making a possession order on any ground except Grounds 7A and 14 until it is put right and exposes you to penalties.
What is the difference between a sitting tenant and a regulated tenant?+
A 'sitting tenant' is any tenant already in occupation when a property is sold, the sale does not end their tenancy, and today that is almost always a Periodic Assured Tenancy that binds the new owner. A 'regulated tenant' is a much rarer and stronger category: someone whose tenancy began before 15 January 1989 under the Rent Act 1977, with a 'fair rent' registered by the Valuation Office and the highest security of tenure in the system. Every regulated tenant is a sitting tenant, but very few sitting tenants are regulated. Because a regulated tenancy is so hard to end and its rent is capped, never buy a property with a pre-1989 tenancy without specialist legal advice.
This page is drafted against the legislation below. Always check the current text of the law before acting.
- Renters' Rights Act 2025 (legislation.gov.uk)
- Assured tenancy forms (Form 3A and prescribed notices) (GOV.UK)
LetSafe UK provides landlord notice templates, compliance documents, and legal guides for England and Wales.