A claim gets questioned. Not refused outright, just questioned, while the insurer works out whether the policy you paid for matches how the property was actually being let. That is usually the wrong moment to discover a gap in your cover.
If you are running an HMO, or about to convert one, that gap is more common than it should be. Standard landlord insurance is built around a single tenancy and one household, and an HMO does not fit that shape.
None of this is about steering you toward a favourite insurer. It is a method for reading a policy properly, so the cover matches the building rather than a generic template. Prefer to talk it through instead? A quick call gets us a clear picture of your property and what you are trying to protect, and points you toward the right questions to ask before you renew or buy.
What’s actually in a landlord insurance policy
Landlord insurance is not one product. It is a set of separate covers bundled together, and no two policies bundle them the same way.
Buildings insurance covers the physical structure against fire, flood and storm damage, as well as subsidence and escape of water. If you have a buy to let mortgage, your lender will almost certainly require it.
Contents insurance covers what you provide: furniture, white goods, and fixtures. It does not cover anything your tenants bring with them. If you let unfurnished, you may need very little of it. If you let furnished, particularly a shared kitchen with communal appliances, it matters a lot more.
Property owners’ liability covers a claim from a tenant, visitor, or neighbour who is injured or affected because of your property. Think a loose banister, a faulty socket, or a leak into the flat below. HMOs genuinely carry a different risk profile here, simply because more people are using the building.
Rent guarantee and legal expenses cover lost income and the legal cost of recovering a property from a tenant who stops paying. We will come back to this, since what it needs to cover has changed.
Treat these as switches you turn on or off, not a fixed bundle you buy in full or skip entirely.
Why a standard buy to let policy usually isn’t enough for an HMO
Here is the real risk. A standard buy to let policy is priced for a single tenancy, one group treated as a household. An HMO usually means several unrelated tenants under separate agreements sharing a kitchen or bathroom, a different occupancy pattern with different wear, different fire risk from multiple cooking areas, and different liability exposure.
If your insurer was not told the property is let this way, you may be relying on cover that was never designed for it. This is one of the most common reasons an HMO claim gets challenged, though the exact consequence depends on your specific policy wording, worth confirming with your insurer directly. The same logic applies if you run, or are considering, a rent to rent arrangement: check your insurance matches how the property is actually let.
Start by telling your insurer exactly how the property is let, in plain terms, and ask them to confirm in writing that the policy is written on that basis. If you are moving from a single let to an HMO, or the other way round, that conversation needs to happen before the change, not after a claim.
How building risk shapes what your policy needs to reflect
We saw this play out on a project on Kilburn High Road in London, a five storey townhouse conversion. The building’s height, over eleven metres, meant fire safety drove much of the design from the start. Secondary escape routes and a mist suppression system went into the plans early, not bolted on once the scheme was already underway.
An insurer underwriting an HMO is pricing exactly this kind of detail, not a generic risk category on a form. The building’s height affects how a fire behaves, and the escape routes affect how quickly people get out. Both shape the premium, and both matter again if a claim is tested. You can see how we worked through it on the Kilburn High Road case study.
Seeing both sides, the design and the investment, is what we call the HMO Architects Dual-Lens Approach™. A policy that was never told about the height, the escape routes, or the fire strategy is not really covering the building that was built.
Setting buildings, contents and liability at the right level
Comparing landlord building insurance or landlord contents insurance on price alone is only half the job. The limits attached to each one matter just as much, and this is where most landlords guess rather than check. Weigh it against your wider HMO running costs rather than looking at the premium alone.
Buildings cover should be set against rebuild cost, not market value. Rebuild cost is usually lower than what the property would sell for, because it excludes land value. Insure to market value and you often overpay for cover you do not need. Insure too low and most insurers apply an average clause, reducing any payout proportionally if you were underinsured at the time of the claim. Either way, guessing costs you money, now or at claim time.
Liability limits are worth checking rather than accepting by default. A common starting point across the market is around two million pounds, with five million often available as a low cost upgrade, though treat these as figures to verify with a current quote rather than fixed numbers. For an HMO with several occupants sharing spaces, the case for the higher limit is usually stronger than it is for a single let.
Accidental damage is worth a specific mention if you let furnished. Standard contents cover often excludes the everyday spills and breakages that come with a shared kitchen and multiple tenants, and this tends to sit as a separate add on rather than something included as standard.
Rent guarantee and legal expenses, since Section 21 ended
This is the one cover type that has actually changed in relevance, not just been talked about more.
Section 21, the route that let landlords end a tenancy without giving a reason, was abolished from 1 May 2026 under the Renters’ Rights Act 2025. Regaining possession from a tenant who stops paying now has to go through the courts on a specific ground, and with existing court backlogs, that process can take considerably longer than the old route did. Further phases of the Act are still rolling out through 2026, so verify the current position on GOV.UK.
In practice, that means a period of unpaid rent is likely to run for longer before you can act on it, and the process to act on it may cost more. Rent guarantee cover protects the income during that period. Legal expenses cover protects you against the cost of the court process. Together they do a distinctly different job to the rest of the policy: everything else protects the building, these two protect your cash flow and legal position while a dispute plays out.
If you skipped this cover in the past because eviction felt quick and straightforward, that assumption is worth revisiting.
How to compare two policies properly
Once you know which covers you need, the comparison comes down to one habit: read past the headline price to what is excluded and what the limits actually are. We call this the Scope Comparison Test™, and it is simple to apply even without an insurance background.
Put two quotes side by side and ask three things of each. What exactly is excluded, not just what is included. What are the real limits on liability, rent guarantee, and legal expenses, not just whether the cover exists. And does the policy explicitly reflect your property as let, HMO or single let, furnished or unfurnished, licensed where relevant.
A cheaper policy that excludes accidental damage on a furnished HMO, or caps legal expenses below what a contested possession case would need, is not actually cheaper once it is tested. Gross premium tells you what you pay today. Scope tells you what you are actually protected against.
Should you switch or renew as is? Answer honestly first.
- Does the policy explicitly name your property as let, matching how it is actually occupied?
- Is the buildings sum insured based on a real rebuild figure, not a guess or a market value?
- Do the rent guarantee and legal expenses limits reflect a possession process that may now take longer?
If you cannot answer yes to all three, resolve it before renewal.
Mistakes that cost HMO landlords at claim time
A few patterns come up again and again, and most are avoidable with a single conversation before renewal rather than after a loss.
Not declaring the HMO use is the most common one, whether through oversight or because the letting arrangement changed after the policy was taken out. Underinsuring the rebuild cost is close behind, usually because the figure used was the purchase price rather than a proper rebuild assessment. Tenants often assume their own belongings are covered under your policy too, when they never are, so make that clear to them directly. An HMO licence that lapses without you noticing is worth a separate check. Ask your insurer plainly whether that affects a claim, since it is not answered the same way by every provider. Our HMO licensing and compliance service is worth a look if licence renewal has slipped down your list.
None of these are complicated to fix. They are complicated to notice, which is why they tend to surface mid claim rather than at renewal.
Demand rarely causes an insurance problem for HMO landlords. Bad assumptions about what is actually covered do.
For the fuller breakdown of HMO insurance types, costs, and how they interact with licensing and compliance, our HMO insurance explained guide covers it in more depth.
Most of what decides whether cover holds up is set long before a claim happens, in how the property was let, described, and valued. If yours is one of the trickier cases, an HMO, a mixed portfolio, or a building with an unusual history, book a call. We will ask about the property, what you are actually running it as, and where you want to take it, then tell you plainly what is worth checking before your next renewal.
For more on the practical side of running an HMO well, our HMO masters newsletter covers this kind of detail regularly.
Frequently asked questions
Does my HMO need a different insurance policy to a normal rental property?
Usually, yes. Standard buy to let insurance is built around a single tenancy, and an HMO, with several unrelated tenants under separate agreements, sits outside that. Declare the actual letting arrangement to your insurer and confirm in writing that the policy reflects it.
Will my insurance be affected if my HMO licence has lapsed?
There is no single rule across the market, so this is one to put to your insurer directly rather than assume. Treat licence renewal and insurance renewal as connected tasks, not separate ones.
What’s a realistic annual cost for HMO landlord insurance?
Costs vary by property size, location, tenant numbers, and insurer, so treat any figure you see as a starting point to verify with a current quote rather than a fixed number to plan around.
Do I need rent guarantee insurance now that Section 21 has ended?
It is worth reconsidering if you previously skipped it. With possession now going through the courts on specific grounds rather than a no fault notice, the period you might need income and legal cost protection for has changed, so check current terms rather than relying on how quickly the old process used to work.
Can I insure a portfolio of HMOs and single lets under one policy?
Some insurers offer multi property policies covering a mix of letting types, others do not. This is a genuine point of difference between providers, worth asking about directly when you compare quotes.
Giovanni is a highly accomplished architect hailing from Siena, Italy. With an impressive career spanning multiple countries, he has gained extensive experience as a Lead Architect at Foster + Partners, where he worked on a number of iconic Apple stores, including the prestigious Champs-Élysées flagship Apple store in Paris. As the co-founder and principal architect of WindsorPatania Architects, Giovanni has leveraged his extensive experience to spearhead a range of innovative projects.

