Six students, six bedrooms, and one of those bedrooms is the box room over the stairs with a window onto the bins. Whoever ends up in it will remember it for the whole year — and so will you, every time the group emails about something.
Room allocation is one of those small decisions that quietly determines how the rest of the tenancy goes. Get it right and the house settles in a weekend. Get it wrong and you spend twelve months refereeing a dispute that started before anyone unpacked.
This guide sets out how to allocate rooms in a student HMO fairly, what the Renters’ Rights Act 2025 changed about student lets from 1 May 2026, how to price rooms of different sizes, and where the legal minimum room sizes bite. There is also a free random room allocator below that you can run in front of the group in about thirty seconds.
Key takeaways
- Random beats negotiated. A visibly random draw removes the accusation of favouritism, which is what most room arguments are really about.
- Decide the rules before the draw, not after. Publish any exceptions (accessibility, a couple sharing) in writing first, or the whole exercise loses its authority.
- Different rooms can carry different rents — but the differential has to be set and disclosed before allocation, otherwise it looks like a penalty.
- Mind the legal minimums. In a licensed HMO in England, a room slept in by one person over 10 must be at least 6.51 m², and anything under 4.64 m² cannot be used for sleeping at all.
- The Renters’ Rights Act changed the shape of student lets. Fixed terms are gone, Ground 4A has strict conditions, and a single joint tenant’s notice can end the tenancy for the whole house.
- Write the result down. Name the room in each agreement or in a signed allocation record, and the argument cannot restart in February.
Why room choice causes friction
No two bedrooms in a converted Victorian terrace are equal. One has a bay window and a double bed; one is over the kitchen and smells of last night’s cooking; one is next to the bathroom and hears everything. Students are paying similar money and comparing constantly, so any allocation that looks like a decision made by a person invites the question “why them and not me?”
The friction is rarely about square metres. It is about process. A group that watched an obviously fair draw will accept a bad outcome; a group that was told the answer will litigate a good one. That is why the method matters more than the result.
The fairest ways to allocate rooms
Every group arrives with a favourite method, and most of them are worse than they sound.
Random draw
✓ Nobody can be accused of favouritism
✓ Takes under a minute
✓ Works before anyone has viewed
✗ Needs rent differentials agreed first
Priced rooms, first choice
✓ Price does the fairness work
✓ Suits mixed budgets
✗ Splits the house by income
✗ Slowest to fill the least popular room
First come / seniority / debate
✓ No effort required from you
✗ Rewards whoever replied fastest
✗ Penalises the newest housemate
✗ Most common source of year-long resentment
In practice the best answer is usually a hybrid: set a modest rent differential for the genuinely better and genuinely worse rooms, publish it, then allocate the remaining like-for-like rooms at random. That way price handles the real inequality and the draw handles the perceived one.
The five-step fair allocation process
How to allocate rooms without an argument
Measure and photograph every room
Set and publish any rent differences
Agree the exceptions in writing
Run the draw with everyone watching
Record the result in the agreements
How to use the free random room allocator
Set the number of bedrooms, type in the housemates’ names and the room names as the house actually refers to them (“Front double”, “Box room”, “Loft”), then run the draw. Do it on a shared screen or a video call so everyone sees the same result at the same moment — that is what makes it stick. Screenshot the outcome and send it to the group straight away.
How many bedrooms?
2 bedroomsEnter your housemates’ names
Enter your bedroom names
Results
What the Renters’ Rights Act 2025 changed for student HMOs
This is the part most room-allocation advice has not caught up with. Since 1 May 2026 the Renters’ Rights Act 2025 applies to all tenancies, new and existing, and it reshapes how a student house is let — which in turn changes how you should allocate rooms.
Fixed terms have gone
There is no longer a twelve-month fixed term. Every assured tenancy is periodic, with rent periods of a month or less, and a tenant can end it by giving at least two months’ notice to quit expiring at the end of a rent period. Purporting to let on a fixed term is itself a breach that can attract a civil penalty of up to £7,000.
One joint tenant can end the tenancy for everyone
The long-standing rule that a notice to quit by one joint tenant ends the tenancy for all of them now has real bite, because there is no fixed term holding the group together. If one student drops out in November and serves notice, the whole house’s tenancy ends — even though the others want to stay.
Many student landlords have responded by moving from a single joint tenancy to individual room-only tenancies, where each student holds an agreement for their own room plus shared use of the common parts. That changes the allocation exercise completely: instead of dividing rooms after the group has signed, you are letting a named room at a named rent to each person from the outset, and the draw has to happen before the agreements are drawn up. Our guide to student HMOs vs professional HMOs under the Renters’ Rights Act compares the two models, and the guide to deposits when one joint tenant leaves covers the deposit side.
Ground 4A, and the six-month rule that changes your calendar
Ground 4A is the mandatory possession ground that lets a student HMO landlord recover the property in time for the next academic year. It only works if every condition is met:
- The property is an HMO, or the dwelling is in one.
- Every tenant met the student test when the tenancy was entered into — a full-time student, or someone the landlord reasonably believed would become one during the tenancy. One part-time postgraduate in the group and the ground is unavailable.
- You gave a written statement before the tenancy was entered into saying you may want to recover possession on this ground. Put it in the agreement and keep the signed copy.
- The period from the day the tenancy was entered into to the day the tenant became entitled to possession is six months or less. This is the one that breaks the traditional letting calendar — you can no longer sign a house up in November for a September move-in.
- The relevant date falls between 1 June and 30 September, and you must give four months’ notice.
- You genuinely intend to re-let to students.
The practical effect on allocation is simple: your signing window has moved later, usually to the spring. Groups now view and draw for rooms much closer to the tenancy start, which is actually easier — they have seen the house, so a random draw feels informed rather than blind.
Rent in advance is also gone as a mechanism, which pushes more weight onto guarantors. See our guide to getting a UK guarantor for student accommodation, and the wider renting to students guide for the full picture.
Should every room cost the same?
There is no legal requirement to charge the same rent for every room, and in a house with a genuine spread of sizes, equal rents are the less fair option. The rule that keeps you out of trouble is disclosure: set the differential, explain the reason for it, and publish it before anyone is allocated a room.
| Room feature | Typical treatment | Why |
|---|---|---|
| En-suite or private bathroom | Clear premium | The single biggest driver of perceived value in a shared house |
| Noticeably larger floor area or a double bed | Modest premium | Real, measurable and easy to justify |
| Box room, or a room under the legal single-occupancy minimum | Discount, or let as a study | Cannot lawfully be used as a bedroom if under 4.64 m² |
| Ground-floor room with less privacy or street noise | Small discount | Cheap way to make the least popular room fill first |
| Loft room with restricted head height | Small discount | Usable area is smaller than the floor plan suggests |
| Same size, same aspect, different door | Identical rent, allocate at random | Nothing objective distinguishes them |
Keep the spread sensible. A differential of roughly 5–15% between the best and worst rooms usually reflects reality; much more than that and the cheapest room starts to feel like second-class membership of the house.
HMO room sizes: the legal minimums
Before you allocate anything, check that every room you are calling a bedroom is legally allowed to be one. In England, licensed HMOs are subject to mandatory floor-area conditions set by the Licensing of Houses in Multiple Occupation (Mandatory Conditions of Licences) (England) Regulations 2018, in force since 1 October 2018.
Two points landlords regularly miss. Floor area with head height below 1.5 metres does not count towards the minimum, which matters in loft conversions and rooms with sloping ceilings. And your council can set higher standards than the national minimum through its own licensing conditions or an additional licensing scheme, so check locally before you market a marginal room. Our HMO licensing compliance guide covers the application process, and GOV.UK sets out when a licence is required.
If a room falls short, do not let it as a bedroom and quietly hope. Re-designate it as a study or store, take it out of the draw, and reflect the reduced bedroom count in your yield calculations — our HMO deal stacking calculator will show you what that does to the numbers.
Kit that makes the smaller rooms feel fair
The cheapest way to defuse a room dispute is to make the least desirable room genuinely liveable before anyone sees it. A good desk lamp, a blind that actually blacks out, and somewhere to put a suitcase will do more for the box room than a £20 rent discount.
Measures a room in seconds so your floor areas, rent differentials and HMO minimums are based on real numbers rather than a tape measure and a guess.
700 lumens and a built-in USB port — turns a gloomy north-facing box room into somewhere someone will actually work.
Cut to width at home, so one product fits the odd window sizes you get in a converted terrace. Fixes the streetlight complaint permanently.
Recovers the dead space under a divan, which is the difference between the box room feeling cramped and feeling compact.
Heating is the other equaliser worth spending on. Rooms in a shared house heat very unevenly, and the person in the coldest room will raise it every month until you fix it — our guides to smart thermostats for HMOs and the best smart thermostats for rental properties cover the options.
Check the Bosch EasyDistance 20 on Amazon
Put the allocation in writing
A draw that is not recorded is a draw that gets re-run in the pub. Do one of two things on the same day.
- On individual room-only tenancies: name the specific room in each agreement, with its rent. That is the cleanest outcome and it is now the model many student landlords prefer.
- On a joint tenancy: attach a signed one-page allocation record listing each name against each room, dated, with any rent differential set out. It is not a variation of the tenancy, but it settles the question.
Either way, include the room name in your inventory and check-in report so end-of-tenancy deposit deductions can be attributed to the right person. Our deposit protection guide explains how to protect each deposit correctly — and remember the deposit cap under the Tenant Fees Act 2019 is five weeks’ rent where the annual rent is under £50,000.
Common mistakes to avoid
- Changing the rules after the draw. Granting one swap on request destroys the fairness of every other allocation. If exceptions exist, publish them first.
- Allocating before the group is confirmed. If a housemate drops out you will have to re-run it, and the second draw always feels rigged.
- Charging the same rent for very different rooms. Equal rents in an unequal house are a complaint waiting to happen.
- Letting an undersized room as a bedroom. A room below 6.51 m² in a licensed HMO is a licence breach, and one below 4.64 m² cannot be slept in at all.
- Signing the group up too early. More than six months before move-in and you lose Ground 4A for that tenancy.
- Not recording the result. If it is not written down, it is not decided.
Conclusion
Fair room allocation is cheap insurance. Measure the rooms, price the genuine differences, publish the rules, run the draw where everyone can see it, and write the answer down the same day. It takes an afternoon and it removes the single most common source of friction in a student house.
The Renters’ Rights Act has made that discipline more valuable, not less. With fixed terms gone and one joint tenant able to end the whole tenancy, a house that gets on is now directly worth money to you. If you are weighing up whether student lets still stack up at all, our guide to the pros and cons of student housing investment is the place to start.
Frequently asked questions
Is the allocation truly random?
Yes. The allocator uses the browser’s cryptographically secure random number generator, so the result cannot be predicted or steered. Run it on a shared screen and everyone sees the same draw at the same moment.
What if a housemate needs a specific room?
Take that room out of the draw and say so in advance. Accessibility needs, a medical requirement or a couple sharing a double are all legitimate reasons — and where a disability is involved, adjusting the allocation may be a reasonable adjustment under the Equality Act 2010. What matters is that the exception is announced before the draw, not granted afterwards.
Should rooms of different sizes cost the same?
Not usually. Where rooms differ meaningfully in size, private facilities or aspect, a differential of around 5–15% is fairer than a flat rent. Set it and disclose it before allocation so it reads as pricing rather than punishment.
What is the minimum bedroom size in an HMO?
In a licensed HMO in England, at least 6.51 m² for one person aged over 10, at least 10.22 m² for two people aged over 10, and at least 4.64 m² for a child under 10. A room smaller than 4.64 m² cannot be used as sleeping accommodation. Floor area under 1.5 m of head height does not count, and councils can impose higher standards.
Can I still sign a student house up a year in advance?
You can grant the tenancy, but you will lose Ground 4A for it. One of the ground’s conditions is that no more than six months passes between the tenancy being entered into and the tenant becoming entitled to possession. In practice that has moved the student signing season from autumn to spring.
Do I have to let students choose their own rooms?
No. Room allocation is a matter for the tenancy agreement and whatever process you set. Running a transparent random draw is a choice you make because it works, not because the law requires it.
What happens if one student wants to leave mid-year?
On a joint tenancy, a notice to quit from one joint tenant ends the tenancy for everyone, which is why individual room-only tenancies have become more common in student HMOs. On room-only agreements, only that student’s tenancy ends and you re-let their room.
How do I record the result?
Name the room in each individual tenancy agreement, or attach a dated allocation record signed by every housemate to a joint tenancy. Add the room name to the inventory and check-in report so deposit deductions can be attributed correctly.
Written by the Landlords Portal editorial team, drawing on the Renters’ Rights Act 2025, the mandatory HMO licence conditions in force in England, and current GOV.UK guidance.
Disclaimer: This article is general information for landlords in England and is not legal advice. Take specialist advice on your own tenancy documents and licensing position.
