If you let a house in multiple occupation, the Renters’ Rights Act has split the HMO market in two. Since the main tenancy reforms took effect on 1 May 2026, a student HMO and a professional HMO are now treated very differently in law — and the gap matters most when you want your property back. Student landlords keep a tailor-made way to recover the whole house for the next academic year. Landlords letting to working professionals do not. Get the distinction wrong and you could lose a letting cycle, face a void, or risk a £40,000 penalty.
This guide explains exactly how the Renters’ Rights Act 2025 affects professional HMOs versus student HMOs: the new periodic tenancy regime that applies to both, the student-only possession ground (Ground 4A), why professional HMOs have no equivalent, and what each type of landlord should do now. It is written for England, where the Act applies.
Key takeaways
- Both lose fixed terms. Every assured shorthold tenancy has become an open-ended assured periodic tenancy, and Section 21 “no-fault” evictions are gone for both student and professional HMOs.
- Student HMOs get Ground 4A. A new mandatory possession ground lets qualifying student-HMO landlords recover the property between 1 June and 30 September to re-let to the next year’s students — but only if strict conditions are met.
- Professional HMOs get no equivalent. Ground 4A is exclusive to students. Landlords letting to working sharers can only recover possession on the standard Section 8 grounds (selling, moving in, rent arrears, etc.).
- Tenants can leave on two months’ notice at any time, so professional HMO rooms now turn over on the tenant’s timetable, not the academic calendar.
- The student letting cycle shifts later. Ground 4A’s conditions push fresh student tenancies to no more than six months before move-in, ending the “sign in October for next September” race.
What changed for all HMOs on 1 May 2026
The Renters’ Rights Act 2025 received Royal Assent on 27 October 2025, and the headline tenancy reforms commenced on 1 May 2026 under the government’s implementation roadmap. From that date the changes applied to existing tenancies as well as new ones, so there was no grace period to “see out” an old fixed term.
Three changes affect every HMO, whoever your tenants are:
- No more assured shorthold tenancies. The old AST has been replaced by a single open-ended assured periodic tenancy that rolls month to month (or to match the rent period). Fixed terms are no longer valid for these lets. If you previously relied on assured shorthold tenancy agreements, those tenancies converted automatically on 1 May 2026.
- Section 21 is abolished. You can no longer end a tenancy with a “no-fault” notice. To recover possession you must use a Section 8 ground and prove it.
- Tenants gain flexibility. A tenant can end the tenancy at any time by giving two months’ notice. Rent can be raised only once a year, on at least two months’ notice using the statutory Section 13 process, and the tenant can challenge it at the First-tier Tribunal. Rental bidding is banned, no rent can be demanded before the tenancy is signed, and rent in advance is then capped at one month.
None of this changes your HMO licensing obligations, which sit under separate legislation and continue exactly as before. The Act is about tenancy structure and possession, not licensing or safety standards.
Student HMOs: the Ground 4A lifeline
The student model only works if the whole house empties each summer so it can be re-let to the next cohort for the new academic year. An open-ended periodic tenancy with no Section 21 would have wrecked that. So the Act created Ground 4A: a new mandatory possession ground built specifically for student HMOs. If the conditions are met, the court must order possession.
The conditions you must meet
- It must be an HMO — broadly, at least three tenants forming more than one household sharing the property. One- and two-bed student lets do not qualify for Ground 4A.
- The tenants must meet the “student test” when the tenancy is entered into: they are full-time students, or you have reasonable grounds to believe they will become full-time students. Part-time or short further-education courses do not count.
- You must give prior written notice. Before the tenancy is entered into, you must tell the tenants in writing that you intend to rely on Ground 4A to recover the property and re-let to new students.
- No signing too early. The tenancy must not be entered into more than six months before the tenants are entitled to move in.
- Four months’ notice, ending in the summer window. You must serve at least four months’ notice, and the possession date must fall between 1 June and 30 September.
In practice this keeps the annual cycle alive but moves it later. The six-month rule effectively ends the old race to sign next year’s tenants in October or November. The trade-off is administrative care: miss the written notice at the outset, or serve possession outside the June–September window, and the ground fails. For tenancies that already existed on 1 May 2026, there was a one-off transitional route — landlords could serve a written statement to every tenant by 31 May 2026 to use a shortened two-month Ground 4A notice for that first cycle. The NRLA’s student lettings resources set out the notice paperwork in detail.
If your business depends on the cycle, the new front-loaded admin is worth getting right from day one. For wider letting tips, see our guide to renting to students and the practicalities of arranging a UK guarantor for student accommodation.
Professional HMOs: no special ground, more uncertainty
Here is the part that catches landlords out. Ground 4A is exclusive to student HMOs. If you let to working professionals — nurses, young graduates, key workers sharing a house — you get no equivalent. Your tenancies are open-ended periodic tenancies and your only routes to possession are the standard Section 8 grounds.
The grounds a professional HMO landlord is most likely to use are:
- Ground 1 — moving in. You or a close family member intend to live in the property. Four months’ notice.
- Ground 1A — selling. You intend to sell the property. Four months’ notice.
- Ground 8 and others — rent arrears and breaches. These remain available, but they require the tenant to be at fault and to prove the ground.
Two restrictions bite hard. First, you cannot use Ground 1 or Ground 1A in the first 12 months of a tenancy. Second, after using either ground you cannot re-let or re-market the property for 12 months, and breaching that can attract a financial penalty of up to £40,000. So “selling” or “moving in” cannot be used as a backdoor to clear and re-let a professional HMO. There is simply no lawful way to recover a professional house-share purely to refresh it with new tenants.
Combine that with the tenant’s right to leave on two months’ notice and the professional HMO becomes far less predictable. Rooms now turn over whenever each sharer chooses, not on a tidy annual reset. In a joint tenancy, one person serving notice can unsettle the whole household; in room-by-room tenancies you face rolling, staggered voids. The upside is stability when tenants stay — but you lose the ability to plan the property around a fixed cycle.
Student vs professional HMO: side-by-side
| Feature | Student HMO | Professional HMO |
|---|---|---|
| Tenancy type | Assured periodic (open-ended) | Assured periodic (open-ended) |
| Fixed term possible? | No | No |
| Section 21 available? | No (abolished) | No (abolished) |
| Recover for re-letting cycle? | Yes — Ground 4A (mandatory) | No equivalent ground |
| Main possession routes | Ground 4A; plus standard Section 8 grounds | Ground 1 (move in), 1A (sell), 8 (arrears), etc. |
| Notice to recover | 4 months, expiring 1 Jun–30 Sep | 4 months (Ground 1/1A); varies by ground |
| Prior written notice needed? | Yes — before the tenancy starts | Not for Ground 1/1A (but 12-month bar applies) |
| Re-let after possession? | Yes — to new qualifying students | No re-let/re-market for 12 months after Ground 1/1A |
| Tenant’s notice to leave | 2 months, any time | 2 months, any time |
What about purpose-built student accommodation?
Purpose-built student accommodation (PBSA) sits in a third category. Qualifying PBSA is exempt from the assured tenancy regime altogether, so operators can still grant fixed-term common-law tenancies aligned to the academic year — provided the landlord or manager belongs to a government-approved code of practice (the ANUK/Unipol Code). That exemption is not available to an ordinary street-property student HMO, which is why Ground 4A exists for the latter. If your model is closer to large managed blocks, read our explainer on build-to-rent and managed accommodation for context.
Common mistakes to avoid
- Assuming a professional HMO can use Ground 4A. It cannot. The student test must be met at the outset, so a house of young professionals is locked out even if it is run identically.
- Forgetting the pre-tenancy written notice. For student HMOs, no written notice before the tenancy means no Ground 4A — verify it is issued and kept on file for every tenant.
- Signing students too early. A tenancy entered into more than six months before move-in breaks the ground. Adjust your letting calendar.
- Treating Ground 1A as a re-letting tool. Using “sale” or “move in” then re-letting within 12 months risks a penalty of up to £40,000.
- Mixing student and professional tenants. If not all tenants meet the student test, Ground 4A is unavailable for that tenancy.
What to do next
If you run a student HMO, build Ground 4A into your process: issue the prior written notice to every tenant before they sign, keep tenancies within the six-month window, and diarise possession notices to expire inside the 1 June–30 September window. Your cycle survives — it just runs later and demands tidier paperwork.
If you run a professional HMO, accept that you no longer control the calendar. Underwrite each let for indefinite occupation, tighten referencing, budget for staggered voids, and treat long, stable tenancies as the goal rather than annual churn. Where you genuinely intend to sell or move in, plan four months ahead and respect the 12-month bars. If a property’s whole appeal was the predictable re-let cycle, it may now suit students — or a different strategy — better than working sharers.
Written by the Landlords Portal editorial team. This article is general information for UK landlords, not legal advice. The Renters’ Rights Act is being implemented in stages and secondary regulations continue to be published — check the current position or take professional advice before serving any notice.
Frequently asked questions
Can I still let a student HMO on a fixed-term tenancy?
No. Since 1 May 2026 all assured shorthold tenancies, including ordinary student house-shares, are open-ended assured periodic tenancies. You recover the property for the next academic year using Ground 4A rather than a fixed end date. Only qualifying purpose-built student accommodation can still use fixed common-law tenancies.
Does Ground 4A apply to professional HMOs?
No. Ground 4A is exclusive to student HMOs where every tenant meets the student test. A professional HMO let to working tenants has no equivalent possession ground and must rely on the standard Section 8 grounds.
How much notice do I give a professional HMO tenant to leave?
It depends on the ground. To recover the property because you intend to sell (Ground 1A) or move in (Ground 1), you must give four months’ notice, and you cannot use these grounds in the first 12 months of the tenancy. Fault-based grounds such as serious rent arrears have shorter notice periods.
Can I re-let after using Ground 1A to “sell”?
No. After using Ground 1 or Ground 1A you cannot re-market or re-let the property for 12 months. Breaching this can lead to a financial penalty of up to £40,000, so these grounds cannot be used to clear a property simply to re-let it.
What is the “student test” for Ground 4A?
When the tenancy is entered into, the tenants must be full-time students, or you must have reasonable grounds to believe they will become full-time students. Part-time study or short further-education courses do not meet the test, and all tenants in the HMO must qualify.
Can a tenant leave my HMO whenever they want now?
Broadly yes. Under the assured periodic tenancy regime a tenant can end the tenancy at any time by giving two months’ notice, in both student and professional HMOs. This is the main reason professional house-shares no longer turn over on a predictable annual cycle.
