One of the easiest ways to get caught by licensing is not knowing a scheme exists. England runs three licensing regimes under the Housing Act 2004, and they trigger on completely different things.

A typical three-bed terrace occupied by one family will not ordinarily be an HMO. But if that same property falls within a selective licensing designation, it may still require a licence.

That's the trap. You can correctly conclude a property isn't subject to mandatory HMO licensing and still need a licence anyway.

Scope: England. Housing is devolved, and Scotland, Wales and Northern Ireland operate different systems. Additional and selective schemes are local, so treat this as the national framework and check your council.

Regime One: Mandatory HMO Licensing

Applies nationally. No council designation required, same test everywhere in England.

MHCLG's rent repayment orders offences guidance states that mandatory HMO licensing applies to all properties in England occupied by five or more people from two or more households. Less common HMO types, including converted buildings and converted houses, also fall under mandatory licensing.

Two details that catch people:

• There's no storey requirement:
  The old "three storeys or more" rule was removed by the Licensing of Houses in Multiple Occupation (Prescribed Description) (England) Order 2018, in force from 1 October 2018. A two-storey terrace let to five sharers is licensable.

• The tenancy agreement doesn't determine HMO status:
  Actual occupation does.

Regime Two: Additional HMO Licensing

Additional licensing allows councils to extend licensing beyond the national mandatory threshold. In many schemes this includes HMOs occupied by three or four people from two or more households, and some designations also cover other categories such as section 257 HMOs.

Schemes are brought in by local councils and last for up to five years. They don't exist in every council area, and where they do exist they sometimes cover only part of the area rather than all of it. Reported numbers vary, but additional schemes are concentrated in university towns and urban centres where shared housing is dense.

Regime Three: Selective Licensing

Where a selective scheme is in place, privately rented houses covered by the designation must be licensed.

Also brought in by councils, also lasting up to five years, also sometimes covering only part of an area.

Occupancy is irrelevant. Location is everything. This is the regime that catches ordinary family lets, and it sits under a different offence provision from HMO licensing.

The Four HMO Tests

Worth knowing, because "five people, two households" is shorthand for something more layered. MHCLG sets out four tests, and a property needs to meet one of them to be an HMO.

1. Standard HMO test:
   Shared by at least three people from two or more households, it's their main home and the property is only used for that purpose, they pay rent, and they share facilities like bathrooms and kitchens, or the accommodation lacks a basic facility such as a kitchen or bathroom.

2. Self-contained flat test:
   Same criteria, applied to individual flats.

3. Converted building test:
   Home to at least three people not part of the same household, originally a single property converted into flats or bedsits with at least one unit not self-contained, their main home, used only for that purpose, and they pay rent.

4. Converted houses, or section 257 HMOs:
   Applies to whole converted properties: home to three or more people from different households, converted into self-contained flats, doesn't comply with the applicable building standards, more than a third of the flats are rented, and the occupants pay rent.

That last one is easy to miss and applies to buildings that don't look like HMOs at all.

Working Out What Applies

1. Five or more occupiers from two or more households? Mandatory licensing applies nationally.

2. Is the property an HMO below the mandatory threshold? Check whether an additional licensing scheme covers that address and that type of HMO.

3. Whatever the occupancy, check whether a selective scheme covers that address.

More than one regime can be in play at the same address, and MHCLG's guidance acknowledges a tribunal might find a different regime applies from the one either party assumed.

Separately, check whether the property is affected by an Article 4 direction. The two systems overlap but are distinct: an Article 4 direction governs whether you may create an HMO, while licensing governs whether you may let one. A licence doesn't cure a planning breach.

Apply as early as possible. Processing times vary significantly between councils, and you should not assume an application made shortly before occupation will be processed in time.

Licence Duration, Conditions and Standards

Licence duration is typically five years, though councils set their own terms and shorter licences are used where compliance history warrants it.

Fees are set locally rather than nationally and vary considerably. Reported ranges run from around £500 in some areas to over £1,500 in others, often split into an application part and an issue part, sometimes with discounts for accredited landlords. Check with the council.

National minimum sleeping-room sizes apply to licensed HMOs in England. The standards include 6.51 square metres for one person aged 10 or over and 10.22 square metres for two people aged 10 or over. A separate 4.64 square metre minimum applies to one child under 10. Local authorities can impose additional conditions, so the licence itself still matters.

The fit and proper person test considers unspent convictions, discrimination findings, housing law breaches and management history.

Fire safety requirements depend on the property's layout, risk profile and applicable standards. Licence conditions may call for measures such as enhanced fire detection, fire doors or other fire precautions.

Amenity standards cover the ratio of bathrooms, toilets and kitchen facilities to occupants. Management standards cover common parts, waste and the fitness of the licence holder.

Breaching a licence condition is a separate matter from operating unlicensed.

What Happens If You Operate Unlicensed

Operating without a required licence is a criminal offence: section 72(1) of the Housing Act 2004 for HMOs, section 95(1) for houses under selective licensing. Both carry an unlimited fine on conviction.

Civil Penalties: Councils can impose a financial penalty as an alternative to prosecution. The position here is reported inconsistently. Many sources state the maximum for managing an unlicensed HMO rose from £30,000 to £40,000 on 1 May 2026 under the Renters' Rights Act 2025. Others treat £30,000 as the continuing Housing Act 2004 maximum, with £40,000 applying to separate offences created by the Act. Check the current figure with the local authority before relying on either.

Rent Repayment Orders: Unlicensed HMOs and unlicensed houses both appear on MHCLG's list of RRO offences, and both tenants and councils can apply. A tenant can pursue one even where the council hasn't taken enforcement action, applying directly to the First-tier Tribunal.

For relevant offences committed on or after 1 May 2026, a rent repayment order can cover up to two years' rent. The older 12-month figure still applies to offences committed before that date, which is why both figures continue to appear in published guidance and articles.

The arithmetic is worth doing. Five rooms at £700 a month, over two years, is a substantial sum, and a council penalty can sit on top of it.

Banning orders: are available for serious or repeated breaches, and failure to license appears on the list of banning order offences.

The Defences That Actually Exist

This section changes the risk picture, and most guides omit it.

MHCLG's guidance sets out the defences available to an unlicensed landlord facing an RRO application. A claim fails if the landlord proves at least one applies.

They applied for a licence. A complete defence from the date of application, with an RRO only able to cover the period before the application was made.

That's operationally significant for rent repayment order exposure. An effective licence application can provide a complete defence from the date of application, even before the licence is granted. It does not erase any earlier period during which the property was unlicensed.

A Temporary Exemption Notice. A TEN means the landlord doesn't need a licence. No RRO where a TEN covered the whole unlicensed period.

Reasonable excuse. The tribunal has to be satisfied there was a valid reason for not meeting the requirement.

Superior landlords have two additional defences: that they didn't know and had a reasonable excuse for not knowing the property required a licence, or that they took all reasonably practicable steps to get it licensed.

The Expiry Problem

Once a licence expires, continuing to operate a property that still requires licensing can expose the landlord to the same unlicensed-operation risk, unless an applicable renewal or exemption provision applies.

Five-year cycles are long enough that renewal falls outside working memory, and long enough that whoever applied has often left by the time it expires. Portfolio landlords hold licences granted at different times across different councils, each with its own date and process.

Put licence expiry dates in the same system as certificate renewals. Our guide to the landlord compliance calendar for England covers the recurring cycle, and portfolio dashboards and reporting exist to make expiry visible before it becomes a criminal matter.

Keeping Occupancy Accurate

One consequence of the tenancy reforms deserves attention here, because it interacts with licensing directly.

Every let is now a periodic assured tenancy with no fixed term, and a tenant can leave on notice at any time. In shared houses that makes turnover more fluid than it was under fixed terms aligned to academic or employment years.

Your licence specifies a maximum number of occupants. Keeping that figure accurate as people come and go is now a live management task rather than something checked once a year at renewal.

What to Keep on File

Enforcement typically starts with a tenant complaint, and what follows is documentary. Note that MHCLG advises tenants to gather tenancy agreements, deposit protection certificates and communications with the landlord as evidence, so the same material works both ways.

The exact documents depend on the property, licence conditions and applicable safety requirements, but a practical compliance file may include:

• The licence, with grant and expiry dates

• The conditions attached to it, which are property-specific

• Gas safety records

• EICR and appliance records

• EPC

• Fire risk assessment where applicable

• Room measurements and permitted occupancy

• Written statements provided to tenants

• Deposit protection confirmations

• Evidence of compliance with each licence condition

That last one is the gap in most files. Producing the licence is easy. Producing evidence that every condition has been met is a different exercise.

The Practical Position

• Check every property against all three regimes, not just the ones that look like HMOs.

• Recheck when designations change. Schemes run for up to five years and councils introduce, extend and let them lapse. A property outside a scheme in 2024 may be inside one now.

• Recheck when occupancy changes. A four-person let that becomes five crosses the mandatory threshold, and nothing external tells you.

• Verify locally. Additional and selective schemes, fees, conditions and processing times are all council decisions.

Conclusion

The mandatory threshold is the easy part. Five people, two households, no storey requirement since 2018. The difficulty is that two of the three regimes are local, invisible from outside, and change on council timetables. A landlord can comply perfectly with the national rule and still be unlicensed because a designation extended to cover their address.

The exposure is asymmetric too. An unlicensed let isn't just a fine. It's a criminal offence, a rent repayment order that a tenant can pursue independently of the council and that can now reach two years' rent, and potentially a banning order.

The single most valuable thing you can do when licensing status is unclear is act promptly: check the applicable regime with the council and, where a licence is required, make an effective application rather than allowing uncertainty to become an extended unlicensed period.

Frequently Asked Questions

1. When does a property need a mandatory HMO licence in England?
Where it is occupied by five or more people from two or more households. Certain converted buildings and converted houses also fall under mandatory licensing. There has been no storey requirement since 1 October 2018.

2. What's the difference between HMO licensing and selective licensing?
HMO licensing turns on how many people live in the property and how they're grouped into households. Selective licensing turns on location: councils designate areas where privately rented houses covered by the designation need a licence, including ordinary family lets. The offences sit under different provisions, section 72(1) and section 95(1) of the Housing Act 2004.

3. Do I need a licence for a three-person house share?
Not under mandatory licensing, which applies at five or more. But additional licensing allows councils to extend licensing below the mandatory threshold, commonly to HMOs with three or four people from two or more households. A selective scheme may also apply. Neither exists in every council area and both sometimes cover only part of one.

4. What happens if I let an unlicensed property?
It's a criminal offence carrying an unlimited fine on conviction. Councils can issue civil penalties as an alternative to prosecution, and both tenants and councils can apply for a rent repayment order. For offences committed on or after 1 May 2026, an RRO can cover up to two years' rent.

5. Is there any defence to operating unlicensed?
An effective licence application provides a complete defence to an RRO from the date of application, though it doesn't erase an earlier unlicensed period. A Temporary Exemption Notice removes the requirement while it applies. A reasonable excuse defence exists, and superior landlords have additional defences around not knowing and taking all reasonably practicable steps.

6. Did the Renters' Rights Act change HMO licensing?
The Housing Act 2004 licensing framework, definitions and schemes remain in place. What changed is the nature of the tenancies inside licensed HMOs, which are now periodic assured tenancies with no fixed term. Penalty levels and rent repayment order periods have also been affected.

Important Notice

This article applies to England only. Housing law is devolved and licensing differs in Scotland, Wales and Northern Ireland.

Information was checked against MHCLG guidance available as at 21 August 2026. Additional and selective licensing schemes, fee levels, licence conditions and processing times are set locally and vary between councils. Civil penalty maximums are reported inconsistently across published sources.

Always check the position with the relevant local authority before letting, and verify current penalty levels rather than relying on any published figure.

This content is general information only and does not constitute legal advice. RIOO is not a law firm. Operating an unlicensed property is a criminal offence. Consult a housing solicitor where licensing status is unclear.