HMO vs Single Let: Which Fits the Property?
October 22, 2021
Choosing between an HMO and a single let isn’t just a competition to find the biggest monthly rent. I want to know what the conversion costs, how the property will operate, what the owner wants and whether the finished home makes sense in its location.
In October 2021, I visited a property that made this comparison particularly interesting. It had been considered for a five-bedroom HMO, but the investor decided to keep it as a three-bedroom family home. It wasn’t my property. I was looking at another investor’s decision and explaining both the layout possibilities and the financial model as it stood then.
The HMO could potentially have generated more gross rent. The single let needed considerably less work and still appeared to offer a useful result. That makes it a better example than a simple claim that one strategy always wins.
You can watch the original HMO-versus-single-let property tour to see the building and my assessment at the time.
Why the house offered two possible strategies
The property had three bedrooms upstairs and a substantial extension at the back. That extra ground-floor space was important. Without it, the HMO layout I described would have been much harder to achieve.
My outline was to create a shared kitchen and living area in one part of the ground floor, with additional bedrooms and en-suite facilities using the other space. The garage area was another part of the conversion discussion.
As a family house, the same features worked differently. The large kitchen and dining space, useful storage and generous bedrooms made it attractive without dividing the building into more individual rooms.
I liked that it wasn’t a property with only one possible future. But having a layout that appears promising is the beginning of the assessment. Plans, permissions, safety requirements and accurate costs still need checking before treating a conversion as deliverable.
The owner’s priorities affected the answer
I described the investor as choosing to keep the property in keeping with the area. That decision mattered even though an HMO could have produced a higher headline rent.
I think it’s useful to recognise that an investor’s objective isn’t always to extract the largest possible gross income from every building. Simplicity, local fit, the amount of work and the sort of accommodation they want to provide can all influence the choice.
That doesn’t make the financial analysis optional. The single let still needed to stack up. It simply meant we were evaluating a strategy that fitted the owner’s preferences rather than assuming the maximum room count was the only sensible outcome.
I’d apply the same principle to someone starting out. A higher projected return may be less appealing if it comes with work, borrowing or management demands they aren’t prepared to handle. The right comparison includes the operator as well as the property.
Compare conversion budgets before comparing rents
In the video, I estimated that the HMO conversion could cost around £50,000–£55,000. The single-let refurbishment was discussed at about £20,000. Those were 2021 project figures, not current building quotations.
The single-let work was relatively straightforward: a replacement kitchen and bathroom, carpets, decorating and associated work. We weren’t describing an extensive rearrangement of walls and services to create the proposed HMO layout.
That difference in capital matters. A more expensive conversion needs more money committed before the additional rent arrives. It may also need more time, more professional input and a larger allowance for unexpected work.
I’d want comparable scopes before judging either figure. A cheap quotation that omits necessary safety work or finishing isn’t a useful comparison with a complete specification. The question is what it costs to deliver a legal, lettable home in each format.
Higher HMO rent brings a different operating model
The potential HMO rent discussed in the video was around £3,600 a month. For the family house, I used £1,400 in the model, within the range I was considering for that market at the time.
Those figures make the HMO look immediately stronger, but they are gross income estimates. An HMO may involve landlord-paid bills, more frequent room changes, additional management and more intensive use of shared facilities. The exact arrangement needs to be costed.
A single let has its own risks, including the possibility of losing the whole rental income during an empty period. An HMO can spread income across several occupants, but several empty rooms or growing bills can still put pressure on the result.
I’d compare net cash flow after realistic costs and finance, not just £3,600 against £1,400. My guide to letting-agent fees explains why the management service and charging basis matter in that comparison.
The purchase and refurbishment figures
The purchase price in this example was £280,000. I discussed an estimated finished value of £330,000, with £320,000 also tested as a less favourable valuation.
At £280,000 plus £20,000 of works, the simple purchase-and-refurbishment total is £300,000. Against a £330,000 valuation, that leaves £30,000 before the other costs. The video also discussed substantial fees connected with the purchase and bridging finance, so that gap wasn’t all profit.
This is why I prefer to write the components separately. Purchase price, works, transaction costs, finance and end value each affect the outcome. A change in any one can make the apparent margin smaller.
The model also referred to around £103,000 of initial cash committed. That’s a historical model input, rather than a universal deposit requirement for a £280,000 purchase. The financing route and costs explain why the cash needed was more than a simple deposit calculation.
Be careful with the original tax assumption
The video included a discussion of a reduced stamp-duty treatment said to be connected with the property’s condition. I wouldn’t turn that discussion into a rule that a house without a working kitchen automatically qualifies for a different tax calculation.
A property’s condition and its tax treatment require a proper assessment of the relevant facts and law. An old project spreadsheet isn’t enough to establish the position on another purchase.
For a new deal, I’d have the appropriate adviser confirm the tax assumptions and include the supported amount in the budget. If a particular treatment is uncertain, I’d want to know the effect of the less favourable outcome before committing.
That approach keeps the useful investment lesson without presenting a case-specific claim as a general saving available to every investor. The purpose of the comparison is to make a sound decision, not to make the model look better with an unverified assumption.
What the proposed refinance would change
The property had been bought with bridging finance, and the plan was to refinance after the work. In the video, I discussed a possible release of around £37,500 at the higher valuation and around £30,000 at the lower one.
Those were projections while the work and refinance were still being completed. I didn’t present a final lender statement or a completed result in that video, so this article shouldn’t imply the predicted sums were definitely received.
A refinance can return some of the investor’s cash by replacing the existing borrowing with a new loan. It also creates the ongoing mortgage commitment. The money received is borrowed money, not a second profit on top of the property’s equity uplift.
That distinction matters when comparing the two strategies. Recovering capital can improve flexibility and affect the cash remaining in the deal, but it doesn’t remove the need to service and ultimately repay the debt.
Separate cash returned from investment return
In the original discussion, I used a combined-return presentation that included projected refinance proceeds and rent. For a clearer comparison here, I’d keep those components separate rather than describe all cash received as investment profit.
The projected rental return was about 6.78% against the initial cash in the model, and I discussed monthly net cash flow around £600. Both depended on the costs, rent and financing assumptions being achieved.
If a refinance reduces the investor’s cash left in the property, the percentage rental return on that remaining cash can change. However, the loan balance and interest costs may change too. It isn’t simply the same income divided by a smaller number without consequences.
I’d show initial cash required, projected ongoing cash flow, cash potentially released and equity remaining as separate lines. That gives a much more useful view than a headline suggesting that half the investment has been earned back merely because a lender advances more money.
Check the rules for the actual intended use
An HMO requires more than enough rooms to fit beds. Licensing, planning, building standards, fire safety and the permitted occupancy need checking for the particular property and location.
The government’s HMO licensing guidance explains that smaller properties can also need a licence depending on the area. I wouldn’t assume that keeping below five occupants removes every licensing or planning requirement.
Equally, a single let still carries landlord responsibilities. Choosing the simpler layout doesn’t remove the need for safe accommodation, appropriate insurance and finance that permits the intended letting.
I’d resolve those points early because they can change the entire comparison. A projected HMO income has little value if the proposed use cannot be delivered lawfully or the cost of meeting the requirements has been left out.
Choose the outcome that works as a whole
What I liked about this example was that the owner wasn’t forced into the most complicated conversion to make use of the building. The single-let route retained a spacious family home, required less refurbishment and had a financial case worth considering on the figures available then.
The HMO alternative deserved analysis too, but a larger rent alone wouldn’t settle it. I’d want the full cost, realistic net income, financing, permissions and management demands alongside the owner’s aims.
My property investment planning approach starts with that wider fit. If you’d like to discuss your own HMO or single-let plans, book a free 30-minute call, explore the Starter Club or find out about Done For You.