Over the past few years, I’ve watched the short-term rental landscape in the UK shift more dramatically than at any point in the last decade. The rules that once made Airbnb-style letting a near-automatic side hustle are tightening fast, and if you’re a host — or thinking of becoming one — the window for operating without a formal registration is closing. From 2026, all short-term let hosts in England must register with the government’s short-term let register before listing their property, and the penalties for ignoring it start at £2,500. That’s not a distant rumour; it’s a concrete deadline that changes the maths for anyone letting out a second home or investment flat.
What I’ve noticed covering this space is that most hosts still don’t realise how much the ground has moved. The Levelling-up and Regeneration Act 2023 gave local authorities in England new powers to require planning permission for short-term lets, and it created the framework for that mandatory registration scheme. If you’re letting a property that isn’t your primary residence, you now need planning permission to use it as a short-term let under the new Class C5 use class. The old assumption that you could just list a spare flat on Airbnb and see what happens is gone. Here’s what you actually need to know.
What the new short-term let registration scheme actually means for hosts
The most important thing to understand is that registration isn’t optional. Under powers in the Levelling-up and Regeneration Act 2023, a mandatory registration scheme for short-term lets in England came into operation. All hosts letting a property for short-term stays must register the property with the national register before listing. Registration requires basic safety compliance: smoke alarms, CO alarms, and gas safety certification. Platforms are required to check registration numbers before listing properties. If you don’t register, you face a £2,500 fixed penalty notice, rising to £7,500 for repeated breaches. Local authorities can access the register to enforce planning and licensing compliance.
What I’d do if I were starting today: get the registration sorted before you list anything. The £2,500 penalty is the floor, not the ceiling, and local authorities are getting better at cross-referencing booking platforms against the register. If you’re already hosting, check whether your property is registered now — the transition period won’t last forever.
Why the London 90-day rule and planning changes matter more than most hosts realise
London has had its own short-term let restrictions since the Deregulation Act 2015. Whole-property short-term lets in the Greater London area are limited to 90 nights per calendar year without planning permission. This applies to all 32 London boroughs plus the City of London. Airbnb and other platforms automatically stop listings after 90 nights for hosts who have not verified they have planning permission for unlimited short-term letting. Hosts who exceed the 90-night limit without planning permission face a £20,000 fine from their London borough. Room-by-room lettings where the host remains resident are not subject to the 90-day cap.
Outside London, the picture is more fragmented. From May 2024, planning permission is required in England to use a dwelling as a short-term let if it is the owner’s second home or investment property — not their primary residence. Primary residences let for short periods while the owner is away do not require planning permission; the property remains in Class C3. Local authorities can designate areas where permitted development rights to switch between C3 and C5 do not apply. Operating a short-term let without the required planning permission is an enforcement risk: planning enforcement notice, stop notice, or prosecution.
What I’d do: if you’re in London, track your nights meticulously. The automatic platform cut-off is helpful, but it only applies to listings on that specific platform. If you list across multiple sites, you could exceed 90 nights without any single platform flagging it. A simple spreadsheet or a dedicated booking management tool can save you a £20,000 headache.
Where hosts get tripped up — and how to avoid the same mistakes
Assuming registration and planning permission are the same thing
They aren’t. Registration is a national requirement from 2026 that applies to all short-term lets. Planning permission is a separate local requirement that applies to second homes and investment properties converting to Class C5. You need both. I’ve seen hosts register their property thinking they’re fully compliant, only to receive a planning enforcement notice months later. The two processes run in parallel, and local authorities can pursue either route independently.
Ignoring the council tax to business rates switch
The tax treatment of short-term lets depends on the number of days the property is available and actually let. If a property is available for short-term letting for 140+ days per year and actually let for 70+ days, it moves from council tax to business rates. Properties with a rateable value under £12,000 qualify for 100% Small Business Rate Relief if the owner has no other business properties — effectively zero rates. Properties below the 70-day letting threshold remain liable for council tax, and the second home premium (up to 100% additional council tax) applies in many areas. Missing this switch can mean overpaying council tax or underpaying business rates, both of which come with penalties.
| Letting pattern | Tax treatment | Key threshold |
|---|---|---|
| Available 140+ days, let 70+ days | Business rates (may be zero with relief) | Rateable value under £12,000 |
| Available under 140 days or let under 70 days | Council tax (may include second home premium) | Second home premium up to 100% |
Overlooking safety compliance before registration
Registration requires basic safety compliance: smoke alarms, CO alarms, and gas safety certification. Many hosts I’ve spoken to treat this as a box-ticking exercise, but local authorities are increasingly checking. A combined smoke and CO alarm unit can simplify compliance, but the key is documentation. Keep certificates accessible and renew them on schedule. If a platform checks your registration number and finds it invalid, your listing comes down immediately.
Thinking the rules don’t apply to short-term lets outside London
They do. The 90-day cap is London-specific, but the registration scheme and planning permission requirements apply across England. Local authorities outside London can designate areas where permitted development rights to switch between C3 and C5 do not apply. If you’re in a tourist-heavy area like Cornwall, the Lake District, or the Cotswolds, your local council may already have its own restrictions. Check with your local planning authority before listing.
What I’d do: if you’re unsure about your local rules, speak to a real estate lawyer who understands short-term let regulations. The cost of a consultation is tiny compared to the fines and enforcement costs of getting it wrong.
How to stay compliant and keep your short-term let running
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Register your property before listing
From 2026, you cannot list a short-term let in England without a registration number. The process requires you to submit basic safety compliance documentation: smoke alarms, CO alarms, and gas safety certification. Platforms are required to check your registration number before publishing your listing. If you’re already hosting, register as soon as the scheme opens — don’t wait for the deadline. The £2,500 penalty applies to unregistered properties, and local authorities can access the register to enforce compliance.
Get planning permission if you’re letting a second home or investment property
If the property is not your primary residence, you need planning permission to use it as a short-term let under Class C5. Existing long-term rental properties (Class C3) converting to short-term lets require planning permission to change use to Class C5. Primary residences let for short periods while the owner is away do not require planning permission. Apply to your local planning authority. The process can take several months, so start early. If you’re in an area where the council has designated restrictions, you may need additional approvals.
Track your letting days and tax position
Keep a log of how many days your property is available and how many it’s actually let. This determines whether you fall under council tax or business rates. If you cross the 140/70 threshold, notify your local council and apply for business rates. If your rateable value is under £12,000 and you have no other business properties, you can claim 100% Small Business Rate Relief — effectively zero rates. If you stay below the threshold, check whether your council applies a second home premium. Some councils add up to 100% extra council tax on second homes.
Stay ahead of future changes
The regulatory landscape is still evolving. Los Angeles is currently debating whether to allow second-home short-term lets ahead of the 2028 Olympics, and similar debates are happening in UK tourist hotspots. The mandatory registration scheme is just the beginning. Local authorities are likely to tighten rules further, especially in areas with housing shortages. Keep an eye on your local council’s planning policies and any consultations on short-term let restrictions. If you’re planning to buy a property specifically for short-term letting, factor in the risk of future restrictions.
- 1Check if your property needs planning permissionIf it’s a second home or investment property, you need planning permission to change use to Class C5. Contact your local planning authority to confirm.
- 2Register with the national short-term let registerFrom 2026, registration is mandatory before listing. Submit safety compliance documentation and get your registration number.
- 3Track your letting days and notify your councilLog availability and actual let days. If you cross the 140/70 threshold, switch from council tax to business rates and claim Small Business Rate Relief if eligible.
- 4Monitor local policy changesCheck your local council’s planning policies regularly. Restrictions are tightening, especially in tourist-heavy areas and areas with housing shortages.
What I’d do: if you’re serious about short-term letting, treat compliance as a recurring task, not a one-off. Set calendar reminders to review your letting days, check your council’s policies, and renew safety certificates. The hosts who get caught are the ones who assume the rules won’t apply to them.
Do I need planning permission if I let my own home while I’m on holiday? ▾
What happens if I exceed the 90-night London limit across multiple platforms? ▾
Can I avoid business rates by keeping my letting days below 70? ▾
What safety checks do I need for registration? ▾
Does the registration scheme apply to Scotland, Wales, or Northern Ireland? ▾
The short-term rental market isn’t disappearing, but the era of operating without formal oversight is ending. Registration, planning permission, and tax compliance are now non-negotiable. My advice: get ahead of the deadlines, track your numbers, and check your local council’s policies before you list. The hosts who adapt will keep letting; the ones who don’t will face fines and enforcement action. If this was useful, you might also want to read property investment myths debunked.
Sources and Further Reading
UK property investment for beginners — A practical step-by-step guide covering the fundamentals of property investment in the current regulatory environment.
Short-term let UK 2026: registration, planning, and tax changes. LetSafe UK, 2026.
L.A. considers expanding Airbnb-style short-term vacation rentals. Los Angeles Times, 2026.
