Holiday let planning use class C5: the checks to make before you rely on short-let income

Many holiday-let deals look profitable until the planning position becomes uncertain.

The income forecast works. The area feels attractive. Short-let demand looks strong. Then the planning status becomes unclear, local controls emerge, or the intended operation no longer fits the assumptions behind the deal.

By that stage, you may already be financially and emotionally committed. This is where experienced investors stop relying on headlines and start testing the real planning position.

Use Class C5 was proposed as a new planning class for dedicated short-term lets in England. However, proposed policy is not the same as planning law that is already in force. Before you rely on C5 for a purchase, conversion, refinance or portfolio decision, you need to establish what applies now.

If you are reviewing a live holiday-let project, book a free project call with HMO Architects. We will use the call to understand the property, what you need it to achieve, how we may be able to help and what the next step should be.

Keep reading for the framework you can use before relying on holiday-let income, along with the planning, property and commercial checks that matter most.

Holiday Let Planning Risk Framework

Before you rely on short-let income, test the project across six connected areas:

• Current lawful use: What is the property legally recognised as today, and does the evidence support that position?
• Planning risk: Could the intended holiday-let operation amount to a material change of use?
• Local control: Do local policy, an Article 4 direction, planning conditions or London’s short-let rules affect the property?
• Operational model: How intensively will the property be used, managed and serviced?
• Property constraints: Do the lease, mortgage, insurance, layout, safety requirements and Building Regulations position support the plan?
• Commercial resilience: Does the deal still work if planning permission is required, occupancy is seasonal or the intended use is restricted?

A weakness in one area can destabilise the whole project. A possible planning route is not enough if the lease blocks short lets. Strong demand is not enough if the property cannot lawfully or safely operate in the way the forecast assumes.

What is the proposed Use Class C5?

The proposed Use Class C5 is intended to create a separate planning class for short-term lets that are not used as someone’s sole or main home.

The key issue is not only what C5 means. It is whether investors are relying on it too early.

The proposal was designed to make it easier to distinguish an ordinary home from a property operating as a dedicated holiday let or short-term rental. That distinction matters because many investors are not buying for normal residential use. The plan may be serviced accommodation, Airbnb-style accommodation, a coastal holiday let or a year-round short-let business.

This is where a project can quietly shift from residential investment into operational business risk. The property may still look like a house or flat, but its income depends on frequent guest turnover, active management and a different pattern of use.

For now, planning decisions still come back to the facts of the property and how it operates. The council may consider how often it is let, how guests use it, how it is managed, whether it still functions as a home and whether the change is material in planning terms. Labels alone rarely decide the outcome.

C5 was proposed to make that distinction clearer. Investors should not confuse proposed reform with confirmed planning certainty. You can read the government’s consultation on a short-term let use class and related permitted development rights for the background to the proposal.

How C5 would differ from C3 homes and C1 hotels

This is one of the biggest areas of confusion in short-term letting.

Class C3 covers ordinary dwellinghouses. It is the use most people associate with a house or flat occupied as a home.

Class C5, if brought into force in the form proposed, would be aimed at dedicated short-term lets that are not used as someone’s sole or main residence.

Class C1 covers hotels, guest houses and similar accommodation. That can involve a different operating model and a different planning assessment.

Small legal differences can completely reshape the planning route. A property may be promoted as a holiday let, serviced apartment, Airbnb, aparthotel, guest house or short-term rental. Those names do not prove the use class. Operational reality usually matters more than marketing language.

For more context, read our guide to planning permission for Airbnb and holiday-let properties.

The current position: C5 has been proposed, but do not rely on it yet

This is where many investors become overconfident too early.

The government announced plans for a new planning category for short-term lets in England that are not used as someone’s sole or main home. However, a proposal, consultation response, policy announcement and live change to planning law are not the same thing.

At the time of this update, the necessary planning legislation for C5 has not been brought into force. Treat that as a live point to check again before making a decision, because the position can change.

This is usually the single most important planning question in a holiday-let investment. If you assume C5 already applies, you may assess the property, contract conditions and exit route on the wrong basis.

Start by confirming the country, the local planning authority, the property’s current lawful use and whether the short-let use is already established. Then check whether any local restriction applies and whether national planning rules have changed since this page was updated.

This guide is focused on England. Wales, Scotland and Northern Ireland have different planning and short-term letting systems, so the same route should not be carried across without checking it.

Would holiday lets need planning permission?

A holiday let does not automatically need planning permission simply because guests stay for short periods. It is also unsafe to assume that every short-term let can operate indefinitely under an ordinary residential use.

The planning answer depends on the operational reality, not the marketing description. The key issues are the current lawful use, the proposed pattern of use, its intensity, its effects and whether the change is material in planning terms.

This is where many attractive-looking deals become exposed. If the project only works at year-round short-let income levels, the planning answer needs to be tested before that income is treated as dependable.

New dedicated holiday lets

A property bought or converted for year-round holiday letting needs careful review. It may be moving away from ordinary residential use into a dedicated commercial short-let model.

If that change is material in planning terms, planning permission may be required. The proposed C5 route was intended to make this situation clearer, but it does not yet give you an automatic route.

Before relying on the forecast, check the lawful use, planning history, local council position, any Article 4 direction and the way the property will operate. You should also review local policy where holiday lets or second homes are creating pressure on housing or neighbourhood amenity.

A lower-risk project usually has a well-evidenced lawful short-let use, a clear planning history, lower operational intensity and no obvious local restriction. A higher-risk project often has gaps in its history, depends on intensive year-round letting, sits in an area under tourism or housing pressure, or operates more like commercial accommodation than a home.

Many holiday-let deals only work at the projected short-let income. If consent is needed and not granted, the whole commercial case may change.

Existing holiday lets

An existing income stream does not automatically prove planning security.

For an established holiday let, confirm whether the use is lawful, how long it has continued, whether any planning conditions apply and whether the evidence is strong enough to rely on. Do not treat booking records, online reviews or the seller’s description as a substitute for planning evidence.

Ask for the planning history, council correspondence, approved drawings, any lawful development certificate, relevant tax or rating records and clear evidence of how the property has operated over time.

The aim is not to collect documents for the sake of it. It is to find out whether you are buying a stable planning position or inheriting someone else’s assumption.

Letting your own home occasionally

Occasionally letting your own main home is different from running a dedicated holiday-let business.

The proposed C5 class was aimed at short-term lets that are not someone’s sole or main residence. Even where the planning risk is lower, you still need to check the lease, mortgage, insurance, local rules and any conditions that affect the property.

In Greater London, the 90-night rule also needs separate attention. A residential property generally needs planning permission when its use as temporary sleeping accommodation exceeds 90 nights in a calendar year, subject to the statutory conditions.

What local councils could still control

This is one of the most overlooked risks in holiday-let investing.

Even if national permitted development rights are introduced in future, local control may still shape the route. A national rule can create a starting position, but it does not always protect a project from an Article 4 direction, planning conditions, local policy or enforcement action.

For an investor, the local position can decide whether the property supports the intended business model.

Article 4 directions and local short-let pressure

An Article 4 direction can remove specified permitted development rights in a defined area. If a relevant direction applies, a change that might otherwise avoid a full planning application may need one.

Always check this by property address. Small boundary differences can completely alter the planning route, and a nearby property may sit outside the affected area.

Our guide to what an Article 4 direction means explains how these local controls can change a project before purchase.

London and the 90-night rule

Many investors discover this restriction too late.

In Greater London, residential premises can generally be used as temporary sleeping accommodation without planning permission for no more than 90 nights in a calendar year, provided the legal conditions are met. Beyond that point, planning permission is normally required.

Do not apply this rule across the rest of England. It is London-specific. The Greater London Authority guidance on short-term and holiday lets explains the position.

If your London deal depends on year-round short-let income, test the 90-night limit before you commit. It can affect the income model, management plan, planning risk and choice of property.

What to check before you buy or convert a holiday-let property

Most expensive holiday-let mistakes begin before the purchase completes.

You do not need every technical answer on the first viewing, but you do need to know where the major risks sit before the project is too far advanced. Test the property in the right order and make your offer, contract and budget reflect the uncertainty.

Planning use and history

This is where many safe-looking projects become uncertain.

Check the current lawful use, planning permissions, conditions, approved drawings, enforcement history and any certificate of lawful use. If the property has already operated as a holiday let, establish what evidence supports that use and whether it has been continuous.

Planning conditions may restrict occupation, seasonality or who can stay. A condition can affect finance and resale as well as daily operation, so read the exact wording rather than relying on a summary from the seller or agent.

Lease, mortgage and insurance

Planning approval alone does not create a viable project.

A lease may restrict holiday letting, business use, underletting or activities that cause nuisance. A mortgage product may not permit short-term letting. Insurance must reflect the actual use and guest turnover.

These are separate checks, and each can stop or weaken the strategy even when the planning position looks manageable.

Safety, Building Regulations and guest layout

The strongest holiday-let projects work operationally, not only legally.

The layout needs to support safe escape, suitable fire precautions, ventilation, heating, drainage, access, cleaning, luggage movement and a practical guest experience. If you are converting the building, subdividing it or carrying out material alterations, Building Regulations may apply separately from planning.

This matters most where a larger property is being divided into several holiday units or where new bedrooms, bathrooms, kitchens and escape routes are being created. A forced layout can weaken safety, reviews, maintenance and long-term returns even if the planning principle is acceptable.

Commercial resilience

Test the numbers against the real planning and operating limits.

Consider what happens if consent takes longer than expected, occupancy is seasonal, the number of lettable nights is restricted or the property has to remain in residential use. Include cleaning, management, utilities, maintenance, platform fees, replacement costs and quieter periods.

Our guide on whether Airbnb can be profitable in the UK explains why planning, operating costs and alternative strategies need to be tested together.

Project example: turning a coastal property into seven holiday-let units

Our Sandylands holiday-let project in Lancaster shows why a broad answer on use class is not enough.

The planning challenge was to turn a deteriorating coastal building into seven self-contained holiday-let units. The operational challenge was to create accommodation that worked for guests and remained practical to manage. The design also had to respond to flood-risk concerns affecting the lower-ground floor and provide a credible escape strategy.

HMO Architects coordinated the layouts, design appraisal, Building Regulations work and council-facing issues alongside the client’s planning consultant. The result was a scheme that balanced planning risk, safety, guest experience and the commercial holiday-let model rather than treating them as separate afterthoughts.

The lesson is simple: projected income may make the deal attractive, but planning, design, compliance and delivery decide whether it can stand up in practice.

What should you do now if you are unsure about C5 or holiday-let planning?

Bring the focus back to the property in front of you. The proposed C5 class is one part of the picture, not the whole decision.

1. Confirm the location and current lawful use. Identify the nation, council, planning history and any conditions or evidence supporting the current operation.
2. Test the intended use. Consider whether the frequency, intensity and management of the holiday letting could amount to a material change of use.
3. Check local controls. Review Article 4 directions, local policy, enforcement history and the London 90-night rule where relevant.
4. Review the property constraints. Check the lease, mortgage, insurance, safety, layout and Building Regulations position.
5. Stress-test the business case. Confirm whether the project still works if consent is needed, the number of lettable nights changes or the property needs a fallback use.

If you are assessing a live property, book a free project call. The call is used to understand the property, your needs, how HMO Architects may be able to help and the right next step. That may be a planning review, a project feasibility call or a wider design and delivery discussion.

For more structured support, review our planning service for investment properties.

You can also use the Top 3 HMO Deal Killer Policies guide to help identify restrictive local policies earlier. Although it was created for HMO projects, the habit of checking policy risk before purchase is directly relevant to holiday-let due diligence.

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FAQs

Is Use Class C5 already law?

No. At the time of this update, Use Class C5 has been proposed for dedicated short-term lets in England but has not yet been brought into force. Check the latest government and planning position before relying on it for a purchase or conversion.

Would existing holiday lets need to apply for planning permission?

Not automatically. Earlier proposals indicated that qualifying existing dedicated short-term lets would move into the new class without a planning application. Because C5 is not yet in force, you still need to establish the current lawful use, planning history, conditions and evidence of operation.

Would a new year-round holiday let need planning permission?

It may. The answer depends on the property’s current lawful use, the intensity and character of the proposed operation, whether there is a material change of use and any local controls. This should be checked before the deal is assessed on year-round holiday-let income.

Does the proposed C5 use class apply across the UK?

No. The C5 proposal discussed here is focused on England. Wales, Scotland and Northern Ireland have their own planning and short-term letting systems.

Does London have different short-term let rules?

Yes. In Greater London, using residential premises as temporary sleeping accommodation for more than 90 nights in a calendar year generally requires planning permission, subject to the statutory conditions.

Could an Article 4 direction affect holiday-let permitted development rights?

Yes. An Article 4 direction can remove specified permitted development rights within a defined area. Check the exact property address and the wording of the live direction rather than relying on a general area description.

Is an existing booking history enough to prove lawful holiday-let use?

No. Booking records may support the evidence, but they do not automatically prove the planning position. Review planning records, council correspondence, lawful-use evidence, conditions and the continuity and character of the operation.

Is a holiday let the same as a hotel or serviced accommodation?

Not necessarily. Marketing terms overlap, but planning decisions look at the real use and operation. Services, guest turnover, management, length of stay and the property’s planning history can all affect the assessment.

Is there a national registration scheme for short-term lets in England?

The government is developing a mandatory national registration scheme for short-term lets in England and has said it is expected to begin in 2026. At the time of this update, the scheme is not yet in force. Registration, planning permission, safety compliance, tax and business rates remain separate checks.