The Short-Term Let Escape Route Is Closing: What Property Investors Must Know Before April 2026

For many property investors watching the Renters' Rights Act bear down on the private rented sector, short-term letting has looked increasingly attractive. With Section 21 abolished from 1 May 2026, evictions made harder, and regulatory costs rising, the logic of switching to Airbnb-style rentals has seemed compelling — potentially tripling monthly income while sidestepping the new tenancy regime entirely. The problem is that the Government has been watching too, and it is closing that door at almost exactly the same time.

The Scale of the Exodus

The appetite for short-term lets among landlords is not theoretical. Research from Lighthouse shows that the number of properties available for short-term rental in the UK grew by 33% between 2019 and 2024 — a period that coincided with the prolonged debate around rental reform. Analysis cited by industry commentators suggests that up to 20% of the private rented sector could shift to short-term letting models if the regulatory environment for traditional tenancies continues to tighten. In tourism hotspots and major cities, that shift is already visible on the ground.

The yield case is straightforward. A quality two-bedroom flat in a central location that commands £2,500 per month under a standard assured shorthold tenancy could generate significantly more under a short-term model — with the flexibility to adjust pricing, block out periods for personal use, and exit the arrangement without navigating the reformed Section 8 possession grounds. For landlords worn down by years of legislative pressure, that flexibility has real value.

The New Planning Framework: Use Class C5

The Government's response has been to create an entirely new planning use class — C5 — specifically designed to capture short-term let properties that are not a host's sole or main residence. Under the proposed regulations, any dwelling that is let to guests for short periods on a commercial basis and does not function as a primary home will fall under this classification, requiring planning permission where a local authority has adopted an Article 4 direction restricting it.

The 90-night annual threshold — already in force in Greater London — is central to how the new class operates. Homeowners who let out their own primary residence for fewer than 90 nights per year will be exempt. But investors who own buy-to-let properties and wish to run them as short-term rentals will not benefit from that exemption, and in areas where councils have introduced Article 4 directions, they will need to seek change of use consent. For existing operations, the position is more nuanced — properties already operating as short-term lets will be automatically reclassified into C5 without needing to apply, but any new conversions will be subject to the new regime. Local authorities in high-pressure markets — Edinburgh, the Lake District, Cornwall, and parts of London — are expected to move quickly to restrict new C5 uses in their areas.

Mandatory Registration: April 2026

Running alongside the planning changes is a mandatory national registration scheme targeted to go live in April 2026. Every short-term let host in England will be required to register with a government-run database, providing property details, safety compliance evidence, and contact information in return for a unique registration number that must be displayed on all listing platforms. Airbnb, Vrbo, and their competitors will be required to enforce this — unlisted properties will not be eligible to advertise.

The safety compliance requirements add meaningful cost and complexity. Hosts must hold valid gas safety certificates, conduct fire risk assessments, demonstrate electrical safety compliance, and ensure appropriate smoke and carbon monoxide alarm installation. For investors who have previously operated informally in this space — or who assumed that switching from long-term letting would involve minimal administrative change — the compliance burden is likely to come as a surprise. Platforms already pass rental income data directly to HMRC, so the registration scheme completes a picture of comprehensive oversight rather than introducing it from scratch.

What This Means for Investors Weighing Their Options

The convergence of these two regulatory timelines — May 2026 for the full PRS reforms, April 2026 for the short-term let registration scheme, and Summer 2026 for the C5 use class — means that investors who have been considering a switch to short-term letting as a way of escaping PRS regulation need to act now or risk finding themselves non-compliant in both markets simultaneously. The window for making an orderly transition has narrowed considerably since these reforms were first announced.

The more productive framing for investors may be to treat short-term lets not as a wholesale replacement for buy-to-let, but as one of several portfolio strategies — and one that requires its own specialist mortgage product, planning position, and management infrastructure to execute properly. Specialist holiday let mortgages carry different lending criteria to standard buy-to-let finance, and lenders are increasingly scrutinising the regulatory status of properties being offered as security. A property operating without the correct planning consent in a restricted area carries meaningful refinancing risk.

Looking Ahead

The broader pattern here is important. The Government is not simply reforming the private rented sector — it is tightening its grip on the entire residential property letting market, short and long term alike. Investors who assumed that short-term letting sat in an unregulated gap have miscalculated, and those who act before April 2026 to register, assess their planning position, and structure their portfolio accordingly will be substantially better placed than those who wait.

For landlords and investors uncertain about how these changes affect their specific properties, taking professional advice now — on planning, finance, and compliance — is more valuable than it was six months ago. The regulatory landscape will not simplify from here.