The Renters' Rights Act Just Killed the 12-Month Student HMO Contract

Section 21 Is Gone. Here's What Actually Changed on 1 May 2026

The Renters' Rights Act 2025 received Royal Assent on 27 October 2025. Its main provisions — the ones that fundamentally restructure every tenancy agreement in England — came into force on 1 May 2026. From that date, no new fixed-term assured shorthold tenancy can be created. Every existing AST automatically converted to an assured periodic tenancy.

Section 21 — the so-called 'no-fault eviction' notice that let landlords recover possession at the end of a fixed term without giving a reason — is abolished. Gone. Not weakened, not restricted. Gone.

For most landlords, the practical impact is manageable. You now rely on Schedule 2 grounds to recover possession, and most of those grounds are familiar. But student HMO landlords face a specific structural problem that general buy-to-let landlords don't: your entire business model depends on recovering the property at the end of an academic year and re-letting it to a fresh cohort. Under Section 21, that was straightforward. Under the new regime, it requires Ground 4A — and Ground 4A has conditions that caught a significant number of landlords off-guard this spring.

Ground 4A: The Only Route Back to Your Property — and Its Strict Conditions

Ground 4A is a new mandatory possession ground introduced specifically for student HMOs. According to guidance from Linley & Simpson and RentalBux, it applies where the property has at least three bedrooms, all joint tenants are full-time students, and the landlord serves at least four months' notice — with that notice expiring between 1 June and 30 September.

Those conditions sound simple. They aren't.

First, the notice window is narrow. If you serve notice too early or too late, it expires outside the permitted June–September band and the ground fails. For a September move-out, your notice needs to land by early May at the latest. Miss that, and you're waiting another full year.

Second — and this is the part that blindsided landlords who were focused on the 1 May 2026 commencement date — there's a separate warning-notice requirement for tenants who were already in occupation when the Act came into force. According to RentalBux and The HMO Agent, for tenancies in existence on 1 May 2026, landlords were required to serve a specific warning notice by 31 May 2026 informing tenants that Ground 4A could be used against them. Miss that 31 May deadline, and Ground 4A is unavailable for the current cycle. Not delayed. Unavailable.

I've spoken to agents managing student portfolios who didn't know this requirement existed until late May. Some caught it in time. Others didn't.

Third, 'all joint tenants must be full-time students' is not a soft condition. If one tenant drops out mid-year, changes to part-time, or takes a leave of absence, the ground may not hold. You'd want to build student-status verification into your tenancy management process — not as a one-off at sign-up, but as an ongoing check. Consider taking qualified legal advice on how to structure that in practice.

If You Missed the 31 May Deadline: Your Options Now

Bluntly: if you had student tenants in place on 1 May 2026 and didn't serve the warning notice by 31 May 2026, Ground 4A is off the table for this academic cycle.

That leaves you with a few paths, none of them as clean as what you had before.

You can negotiate a surrender with your current tenants. Some students will want to leave at the end of the academic year anyway — the incentive structure just changes. You may need to offer something (a rent reduction in the final weeks, help with moving costs, flexibility on checkout date) to make it work. This isn't ideal, but it's faster than court.

You can wait. If the tenants stay and you serve the warning notice correctly now, Ground 4A becomes available for the next academic cycle — so September 2027. That's a full year of lost re-letting flexibility. For a five-bed HMO in a university city, the commercial cost of that miscalculation could be significant.

You can also explore other Schedule 2 grounds — Ground 1 (owner-occupation), Ground 6 (redevelopment), or the discretionary grounds — but none of these are designed for the student-letting cycle and none will give you the clean annual turnover model you're used to.

My position: the landlords most at risk are those managing portfolios of five or more student HMOs who delegated compliance to agents without verifying the warning notice had been served. This is exactly the kind of detail that falls through the gap between landlord and agent accountability. If you're in that position, get clarity on each property's notice status before you have any further conversations about next year's lettings.

The Wider Compliance Picture: Penalties and Rent Increases

Ground 4A isn't the only change worth tracking. The Renters' Rights Act also increased the maximum civil penalty for non-compliance from £30,000 to £40,000, according to AgentHMO. That uplift matters because local housing authorities are increasingly using civil penalties as a first-response tool rather than pursuing criminal prosecution — faster, cheaper, and increasingly common in university towns where student housing is under political scrutiny.

Rent increases are now restricted to once per year through the Section 13 process. No more mid-tenancy increases tied to fixed-term renewals. For student HMOs where rents were historically reset at each annual re-let, this changes the arithmetic. You're effectively locked into a single annual review window, and if you miss it or serve the notice incorrectly, you may be unable to increase rent until the following year.

And there are no new fixed-term tenancies. Full stop. The model of offering a 12-month fixed term starting in September and ending in August — the backbone of student letting for the past two decades — no longer exists in law. What you have instead is a periodic tenancy that continues until either party ends it correctly. Ground 4A is the mechanism that makes the student model work within that framework. Which is exactly why getting it right isn't optional.

The September 2026 letting season is the first real stress-test of the new regime. Some landlords will come through it fine because they — or their agents — moved fast in April and May. Others will spend the next 12 months managing tenancies they can't end on their preferred timeline, watching their re-let window close. The Act didn't kill student HMO investment. But it did kill the assumption that annual possession is automatic. Ground 4A works — if you use it correctly, every year, without exception. The landlords who treat it as a compliance checklist item rather than a strategic priority are the ones who'll be calling solicitors in October wondering why their tenants are still there.