BLOGS

The moment Section 21 dies — and why it matters

On 1 May 2026, something that has defined English landlord-tenant law for nearly four decades comes to an end. From that date, no private landlord in England can serve a Section 21 notice to recover possession without a legally defined reason. Assured shorthold tenancies (ASTs) cease to exist. All tenancies — new and existing — automatically convert to open-ended periodic agreements. Tenants can stay in their home for as long as they choose, subject only to specific grounds for possession under an overhauled Section 8 procedure.

The Renters' Rights Act 2025 received Royal Assent on 27 October 2025. The Government published its implementation roadmap in November, confirming 1 May 2026 as the Phase 1 start date. For England's estimated 4.4 million private rental households and 11 million renters, this is genuinely historic. For the 2.3 million landlords who must now navigate a compliance-first regime, it represents the biggest operational shift in a generation.

Scotland, Wales, and Northern Ireland each operate under distinct frameworks — Scotland abolished the equivalent of Section 21 as far back as December 2017 through its Private Residential Tenancy regime — so England is, in effect, the last part of the UK to move to security-of-tenure protections of this nature. The direction of travel was long signalled; what changes now is that the law has arrived.

A sector already in structural transition

The policy shift does not arrive in a vacuum. England's private rented sector has been under sustained pressure for several years, and the data shows a sector already restructuring itself well before May 2026.

Ministry of Justice statistics revealed that 32,287 households received Section 21 notices in 2024 alone — a 7% year-on-year increase — as landlords rushed to use the mechanism before its abolition. Between July 2024 and June 2025, over 11,000 households were forcibly removed through Section 21 proceedings. These numbers provided much of the political impetus for the Act and illustrate why tenant advocates have long campaigned for its removal.

On the supply side, the landlord exodus is well advanced. According to research published in 2025, approximately 93,000 buy-to-let landlords exited the market during the year, while the number of landlords with buy-to-let mortgages fell by around 65,000 between 2023 and 2024. Savills data shows the total value of privately rented housing declined by 5.1%, or roughly £48 billion, in 2025 — the steepest single-year fall this century. Meanwhile, TwentyEA data showed that 15.6% of all new property sales instructions in Q1 2025 were previously rented homes, up sharply from 9.8% in the same period a year earlier, with only a small fraction of those properties subsequently re-entering the rental market.

The drivers are structural: mortgage cost pressures, successive tax changes including the removal of mortgage interest relief, Stamp Duty Land Tax surcharges on additional dwellings, and now the compliance overhead of the new regulatory regime. Pepper Money research estimates that around 220,000 rental properties could leave the sector by the end of 2026 as a result. Single-property landlords — the bedrock of England's traditionally fragmented, amateur-dominated PRS — are twice as likely to exit as those with larger portfolios, according to the same research.

The consolidation dynamic is already visible in the data. Between 2018 and 2024, the average number of properties per mortgaged landlord grew from 3.2 to 4.5 (UK Finance), and landlords owning between five and 24 properties increased their share of the rental market. REalyse data confirms the same pattern at the local level: in many high-demand districts, the concentration of instruction volume around a smaller pool of actively managing landlords has been rising steadily.

What the new compliance framework demands

Phase 1 of the Renters' Rights Act — effective 1 May 2026 — imposes immediate operational changes that landlords cannot defer.

From that date, landlords must rely exclusively on revised Section 8 grounds to recover possession. These include grounds for serious rent arrears, anti-social behaviour, the landlord's intention to sell (new Ground 1A, requiring a minimum 12-month tenancy and four months' notice), and the landlord wishing to move in themselves (Ground 1, subject to the same conditions). The courts are expected to scrutinise compliance history more rigorously than before: failure to protect a tenancy deposit, failure to serve prescribed information, or non-registration with the forthcoming Private Rented Sector Database will all be capable of invalidating a possession claim.

Financial penalties for non-compliance are substantial. Documentation failures attract fines of up to £7,000 and, if not remedied within 28 days, up to £40,000. Rent increases are limited to once per year via the formal Section 13 procedure, with at least two months' notice required. Rental bidding above the advertised price is banned outright. Landlords can request no more than one month's rent in advance. Tenants have a statutory right to request permission to keep a pet, and landlords cannot refuse without reasonable grounds.

Phase 2, expected in late 2026, introduces the mandatory Private Rented Sector Database — requiring all landlords to register their properties and demonstrate legal compliance — and the new PRS Landlord Ombudsman, with powers to award compensation and compel remedial action. Phase 3 brings mandatory ombudsman membership and enhanced local authority enforcement. The Decent Homes Standard extension to the private sector is scheduled for 2035–2037, giving landlords a longer runway on property quality but no escape from near-term operational demands.

Critically, the 31 May 2026 deadline requires all landlords with existing tenancies to have served the government's information sheet on their tenants. Any landlord who served a valid Section 21 notice before 30 April 2026 has until 31 July 2026 to issue court proceedings — after that date, no Section 21 mechanism exists whatsoever.

Professional landlords and BTR: the structural beneficiaries

The combination of increased regulatory burden and the removal of the no-fault eviction "backstop" is accelerating what was already a structural shift: the professionalisation of England's rental sector.

For well-capitalised, professionally managed landlords, the Act presents a material competitive advantage. The compliance infrastructure that larger portfolio operators have already built — robust referencing, documented rent increase processes, deposit protection protocols, professional property management — maps directly onto what the new regime demands. For the solo landlord with one or two properties and limited administrative capacity, the same requirements represent a step-change in operating complexity and cost.

Build-to-rent (BTR) is the clearest beneficiary. According to Cushman & Wakefield's Q4 2025 UK BTR report, there were 146,700 completed BTR units across the UK at year-end, with investment in the sector reaching a record £5.2 billion in 2025. BTR investment is forecast to exceed £5.7 billion in 2026. Grainger, the UK's largest listed private landlord, reported 98.1% occupancy across its 11,000-home portfolio for the 12 months to September 2025, with like-for-like rental growth of 3.6%. Institutional platforms with professional management, defined maintenance standards, and embedded compliance functions are precisely what the Renters' Rights Act implicitly rewards.

One City analyst quoted in the sector press put it directly: "The Renters' Rights Act 2025 abolishes Section 21 from 1 May 2026, favouring owners with professional tenant management and compliance capabilities." Regional yield dispersion is reinforcing this. Paragon Bank data shows average gross buy-to-let yields reached a 13-year high of 6.93% in 2025, with Wales leading at 8.83% and the North East at 8.2%. The North West regularly delivers yields above 6–7%. REalyse's rental yield data for high-demand regional city districts shows a similar picture: as smaller landlords retract from higher-regulation markets, professional operators are capturing elevated rents against a compressed supply base.

The irony is that the policy environment designed to protect tenants is, in the near term, contributing to supply contraction — with fewer properties available and rents under continued upward pressure. According to Zoopla's March 2026 Rental Market Report, rental stock remains approximately 23% below pre-pandemic levels even as rent growth has moderated to around 1.9% year-on-year nationally. Rightmove data from October 2025 recorded an average advertised rent of £1,385 per month nationally and £2,736 in London. Supply, not legislation, remains the primary driver of affordability.

Tenant security: the real-world picture

For tenants, the abolition of Section 21 is unambiguously a significant gain. The ability to remain in a home without the constant threat of a no-fault notice — which NRLA data confirms has been a leading cause of homelessness — offers a qualitatively different relationship with rented accommodation.

The protections are layered. From 1 May 2026, landlords cannot evict tenants to sell a property or move in during the first 12 months of a tenancy. Rent increases are capped at once per year and must be supported by market evidence, with tenants retaining the right to challenge excessive increases at the First-tier Tribunal. The ban on rental bidding wars removes a mechanism that has systematically disadvantaged lower-income renters in high-demand markets. Anti-discrimination provisions — landlords can no longer refuse prospective tenants on the basis of having children or receiving housing benefit — address documented barriers that have effectively excluded substantial portions of the renter population from well-managed stock.

REalyse's affordability tracking across major English cities shows rent-to-income ratios that have climbed sharply over the past three years, particularly in London, Bristol, Manchester, and Birmingham. In many districts, median-income households are spending well above the traditional 30% threshold on housing costs. Longer-term tenant security, combined with the ability to challenge above-market rent increases, creates at least the structural conditions for tenants to build more stable financial lives within the rented sector — even if supply-side constraints limit how quickly those conditions translate into affordability improvements.

The practical test will be whether the court system can handle the shift to an evidence-based, Section 8-only possession regime without creating significant backlogs. NRLA has consistently flagged the risk that slower possession proceedings for legitimate cases — antisocial behaviour, serious arrears — could deter quality landlords from remaining in the sector. The government's response, including new grounds and streamlined processes for specific situations, is designed to address this, but the proof will lie in tribunal waiting times post-May 2026.

Outlook: a more professionalised, but still undersupplied, sector

England's rental market in the second half of 2026 will look structurally different from the one that existed even three years ago. The amateur landlord owning one or two properties as a pension supplement is being replaced — imperfectly and unevenly — by professional portfolio operators, institutional BTR platforms, and, in some markets, local authority and housing association provision.

For tenants, the direction is broadly positive: greater security, clearer rights, and a landlord base with stronger accountability. For professional and institutional landlords who can absorb compliance costs and manage at scale, the Act creates a more durable operating environment with higher barriers to entry and a reduced competitive set. For the sector overall, the supply gap remains the defining structural risk — and one that no amount of tenure reform, on its own, resolves.

REalyse data across active rental listings, transaction comparables, and planning pipeline continues to show the fastest rent growth in districts where rental supply is tightest and where the small-landlord retreat has been most pronounced. Understanding that local dynamic — which postcodes face acute supply pressure, where BTR pipeline is genuinely coming through, where yields remain attractive against a realistic compliance cost base — is where data-driven decision-making delivers its clearest advantage.

The Renters' Rights Act 2025 has fundamentally changed the rules. The question, as ever in property, is how well and how quickly participants adapt.