How HMO Valuations Work: Bricks-and-Mortar vs Commercial Valuation

August 13, 2026

Investors ask us about HMO valuations constantly, and there is a surprising amount of poor information online about how they actually work. You will often hear people say that an HMO “will get a commercial valuation” as though it is automatic once a property has enough bedrooms or produces enough rent. It is not.

With over 34 years of experience in the HMO sector at the date of this blog post, we have seen just about everything when it comes to valuations, refinancing and lending. In reality, though, the basic principle is quite simple.

An HMO property can attract either a bricks-and-mortar valuation or a commercial valuation. Which method is used will depend on the property, its configuration, the lender, the valuation instructions, the local market, the evidence available to the valuer and a number of other factors. Nobody should be promising an investor in advance that a particular property will definitely receive a commercial valuation.

What matters is understanding the difference, because the valuation basis can have a major effect on what happens when you refinance.

What is a bricks-and-mortar HMO valuation?

A bricks-and-mortar valuation looks primarily at the underlying residential property.

The valuer comes out, inspects the HMO and considers what comparable residential properties nearby have sold for. It could be Pete’s house on one side and Sarah’s on the other. The valuer is essentially asking what this building is worth as residential bricks and mortar in this particular location.

That can create a strange result for an HMO investor.

Imagine buying a house and then spending significant money converting it properly. You may have added bedrooms, created additional bathrooms, changed the internal layout, upgraded fire safety systems, refurbished throughout or even built an extension. You have taken an ordinary residential property and turned it into an income-producing HMO.

Yet a bricks-and-mortar valuation may still be heavily influenced by ordinary houses nearby.

The house next door might produce £1,200 per month as a family rental while your HMO produces several thousand pounds per month. You may also have spent considerably more developing yours. If the valuation remains close to the value of conventional residential properties on the street, much of that extra investment and income is not necessarily reflected in the figure you receive.

There can still be lending advantages. Bricks-and-mortar HMO products can sometimes offer lower interest rates and higher loan-to-value ratios. Depending on the lender and circumstances, an investor might see lending around 75% LTV, and certain products may go higher.

That sounds attractive until you look at what you are actually borrowing against.

A higher percentage of a lower valuation is not always better than a lower percentage of a much stronger valuation.

Why investors sometimes end up with a bricks-and-mortar refinance

We regularly hear investors say that their mortgage broker has found them a very competitive HMO refinance product. The rate looks good. The maximum LTV looks good. On paper, everything appears attractive.

Then the valuation comes back.

What they had not properly considered was the basis on which the lender intended to value the property. A product offering a good rate and 75% LTV does not help much if the underlying valuation leaves the investor unable to recover a sensible proportion of the capital they spent buying and developing the HMO.

There is nothing inherently wrong with bricks-and-mortar lending. For some properties and some investors it can make complete sense. The problem arises when the investor assumes that because the property is an HMO, the lender will automatically value it according to its income.

That assumption can be expensive.

How a commercial HMO valuation works

A commercial valuation approaches the property differently.

Rather than looking only at neighbouring residential sales, the valuer may place greater weight on the HMO as an income-producing asset. Its rental income, configuration, condition, location, operating characteristics and relevant market evidence can all feed into the valuation.

This is where the money spent developing the HMO can potentially have much more relevance.

You might have purchased a tired property, completely refurbished it, added bedrooms, created en-suites, extended the building and produced an HMO capable of generating substantially more rent than the original house could ever have achieved.

Where an appropriate commercial valuation methodology is applied, the resulting figure may better reflect the economics of the finished HMO rather than simply comparing it with Pete and Sarah’s houses next door.

That can give an investor an opportunity to refinance and recover a meaningful amount of the capital tied up in the project.

You may still leave money in the property. In fact, we generally expect that.

The objective should not automatically be to remove every penny you have invested. The objective is to build a sustainable investment that produces dependable cash flow while allowing you to recycle a sensible amount of capital into future opportunities.

Commercial lending usually costs more

There is a trade-off.

Commercial HMO mortgages will often carry higher interest rates than straightforward residential-style HMO products, and the maximum loan-to-value can be lower. Depending on the lender and the circumstances, you may be looking at something closer to 60% to 65% LTV rather than the 75% or potentially higher figures associated with some bricks-and-mortar products.

At first glance, that can make the commercial mortgage look worse.

It can be misleading to compare the percentages without comparing the valuations underneath them.

Suppose one lender offers 75% against a £300,000 bricks-and-mortar valuation. That would equate to £225,000 of borrowing.

Another lender might, purely as an illustration, lend 65% against a £400,000 commercial valuation. That would equate to £260,000.

The second product has the lower LTV, yet potentially releases more capital.

Those figures are deliberately simplified examples rather than an indication of what any particular property will achieve, but they demonstrate why we pay far more attention to the whole refinance position than simply chasing the highest advertised LTV or lowest headline rate.

Commercial mortgages can cost more. In the right circumstances, though, they can produce a much better refinancing result for an HMO investor.

The danger of chasing “all money out”

Now we come to the part that does not receive enough attention.

Commercial valuations can be extremely useful, but they also create an opportunity for investors to overleverage. This is a dangerous trap, particularly when somebody becomes obsessed with recovering every penny they have put into a project.

Social media has made this worse.

You will see developers and deal packagers promoting “all money out deals” as though leaving £20,000, £30,000 or £50,000 invested in a property means you have somehow failed. Some build entire marketing campaigns around the idea that sophisticated investors should always refinance every pound of their original capital.

Ironically, plenty of the people shouting loudest about these strategies appear far more frequently beside flashy cars and in expensive locations than they do discussing the properties they personally own and operate. That is probably a subject for another day.

The important point is that maximum leverage and good investing are not the same thing.

If an HMO genuinely supports the debt being placed against it, that is one thing. Manipulating assumptions simply to extract more money is another.

Unsustainable rents can create unsustainable valuations

One of the easiest ways to make an HMO appear more valuable is to assume very aggressive rents.

Suppose the realistic market rent for a room is £600 per month, but somebody builds their refinancing calculations around £700 or £750 because they believe they can achieve it temporarily.

On a six, seven or eight-bedroom HMO, those inflated assumptions quickly produce a much larger annual rental figure. If that income then feeds into the valuation and refinancing process, the investor may be encouraged to take considerably more debt against the property.

Initially, everything can look fantastic.

They refinance, recover most or perhaps all of their original investment and post online about an “all money out” deal.

Then reality catches up.

Perhaps the local market will not consistently support those rents. Perhaps occupancy drops. Perhaps tenants leave and the rooms have to be reduced back towards the true market level. Perhaps mortgage rates rise at the next refinance.

The investor is then left carrying a very large mortgage that was based on income the property cannot reliably produce.

That is where a clever-looking refinancing strategy can become a serious financial problem.

What happens when interest rates rise?

Highly leveraged properties are far less forgiving.

If you have borrowed aggressively against an HMO and interest rates increase, your mortgage payments can jump substantially. The property still has the same number of bedrooms. There are only so many tenants you can house, and only so much rent the local market will tolerate.

Your mortgage payment, however, may have risen dramatically.

Suddenly the enormous loan that looked brilliant when rates were lower is consuming most of the property’s rental income.

Maintenance does not disappear. Neither do management costs, utilities, insurance, licensing costs, voids, repairs or tax.

The investor who insisted on extracting every possible pound has removed the cushion that could have protected them.

Down valuations can be even more painful

There is another risk.

Imagine that the original refinance was supported by unusually high rents. A few years later the investor needs to refinance again, but those rents have proven unrealistic and have been reduced towards the genuine market average.

The next valuer may look at the actual income being achieved and arrive at a lower valuation.

Now you have a large mortgage sitting against a property that is being valued considerably lower than before.

In more extreme circumstances, an investor can find themselves close to, or potentially in, negative equity.

This is one reason we dislike investment strategies built around squeezing every last pound from a refinance. Property markets move. Lending criteria change. Interest rates change. Rental markets change. Valuers change.

A deal needs enough room to absorb those changes.

Boring is best

We say this regularly at Foot Forward Property Investments:

Boring is best.

It is not an exciting slogan. It probably will not generate millions of views on social media either.

But it has served property investors very well.

We would much rather see an investor leave sensible money in a strong HMO than force an “all money out” refinance that leaves the property stretched to its absolute limit.

Leaving money in a deal gives you equity.

It reduces the amount of debt the property has to service. It gives you more protection if interest rates rise, rents soften or the property receives a lower valuation when you refinance later.

Yes, it sounds boring.

That is precisely the point.

Property investment should not require everything to go perfectly for the numbers to work.

Bricks-and-mortar or commercial: which is better?

There is no universal answer because the right lending structure depends on the HMO and the investor.

A bricks-and-mortar valuation can make sense where the underlying residential value is already strong, where the investor prioritises lower borrowing costs, or where the difference between the residential and commercial value is relatively small.

A commercial valuation may be much more attractive where significant value has genuinely been created through development and where the property produces strong, sustainable HMO income.

The mistake is deciding beforehand that one method is automatically superior.

We look at the actual numbers.

What did the property cost? What has been spent developing it? What is the sustainable rent? What could a realistic valuation look like? How much debt can the property comfortably service? How much capital could sensibly be recovered without leaving the investment exposed?

Those questions matter far more than being able to tell somebody you achieved a particular LTV.

Do not build the deal around the valuation you hope to receive

Perhaps the biggest point investors should take from this is that a commercial valuation should never be treated as guaranteed.

You can structure a property well. You can create an excellent HMO. You can gather strong evidence and work with lenders experienced in the sector.

The final valuation still belongs to the valuer and the lender.

Different lenders have different criteria. Different valuers can interpret properties differently. Local comparable evidence matters, as does the exact nature of the HMO itself.

Our approach is therefore to make the investment work without relying on an unrealistic valuation at the end.

If the commercial valuation is strong and allows the investor to recover a sensible chunk of their capital, excellent. If the result comes in lower than hoped, the deal should still be capable of functioning as a sustainable HMO investment.

That is a much safer position than buying a property on the assumption that every penny must come back out six months later.

After more than 34 years in the HMO sector, the principle has not become more complicated.

Build good HMOs. Use realistic rents. Understand the valuation basis. Borrow sensibly. Leave equity in the deal.

Boring?

Absolutely.

But boring property investments have an irritating habit of continuing to work when the flashy ones start getting into trouble.