HMO Mortgage Requirements: What Lenders Look For

If you’re looking to finance a house in multiple occupation, you’ll quickly find that HMO mortgages work differently from standard buy-to-let products. Lenders treat them as a more complex asset class, and the criteria reflect that. Understanding what’s required before you approach a lender, or a broker, puts you in a much stronger position to structure a deal that works.

This guide covers the main requirements lenders look at when assessing an HMO mortgage application.

What Is an HMO Mortgage?

A house in multiple occupation is a property rented by three or more people from more than one household who share facilities such as a kitchen or bathroom. Common examples include student lets, professional house shares, and bedsit-style properties.

A standard buy-to-let mortgage isn’t designed for these properties. Most lenders require a specific HMO mortgage product once the property meets the definition of an HMO, and some lenders require it even for smaller HMOs where a mandatory licence isn’t yet needed. Using the wrong product can put you in breach of your mortgage terms, so it’s worth getting the right structure in place from the outset.

Deposit and Loan to Value

Most HMO lenders require a minimum deposit of 25%, meaning you can borrow up to 75% of the property’s value. Some specialist lenders will consider up to 85% loan to value.

A larger deposit typically opens the door to more lenders and more competitive pricing. If you can put in 30% or 35%, the lender pool widens and the terms available to you tend to improve. Your broker will be able to confirm what’s realistic based on your property type and experience profile.

Landlord Experience

Lenders often require at least 12 to 24 months of prior buy-to-let ownership and letting experience before they’ll consider an HMO application. Some want to see experience specifically with HMO properties. However, some specialist lenders will accept first-time landlords.

It’s worth being clear about your experience profile from the start so your broker can direct your application to lenders who’ll actually consider it.

Property and Licensing Requirements

The property itself needs to meet a set of conditions, and most lenders will check these as part of their assessment.

HMO Licensing

It is important to ensure that the property you’re looking to purchase does, or will comply, with all current and proposed government and local authority legislation and requirements.

HMO licence applications rose by 40% between 2018 and 2024, from 41,162 to 57,725 nationally, according to Freedom of Information data analysed by Just Landlords. Council enforcement actions rose 180% over the same period. Lenders take this seriously. Most require either a valid current licence or, for purchases, evidence that the application has been submitted.

Some councils operate additional and selective licensing schemes that extend requirements to smaller HMOs or whole neighbourhoods. Always check with the relevant local authority, as the rules vary significantly by area.

Property Standards

Beyond licensing, lenders will want to know the property meets the physical standards required for HMO use. This includes but is not limited to minimum room sizes, adequate fire safety provisions, and the required number of shared amenities. 

Borrower Criteria

Beyond the property, lenders will look at you as a borrower.

Most lenders set a minimum borrower age of 21, and some require 25. Adverse credit, including missed payments, CCJs, or defaults, can significantly reduce the number of lenders willing to consider your application, though specialist lenders exist who will assess cases on their individual merits.

Some lenders also require a minimum personal income, often around £25,000 per year, even where the primary affordability assessment is based on rental income. This varies by lender, so it’s worth checking in advance rather than finding out after application. At Coreco Commercial, this is something your broker will take into account when finding the best lender for you.

Your ownership structure matters too. Borrowing in a personal name and borrowing through a limited company, often a Special Purpose Vehicle or SPV, are treated differently by lenders. Some lenders will only lend to one structure or the other, and the tax implications of each approach differ meaningfully depending on your circumstances. We’d always recommend discussing ownership structure with a tax adviser before you commit to either route.

Article 4 Direction: Check Before You Buy

If you’re buying a property to convert to an HMO, it’s worth checking whether the area has an Article 4 Direction in place before you exchange contracts.

Normally, converting a standard residential property into a small HMO falls under permitted development rights, meaning you don’t need planning permission. Article 4 removes those rights. Where an Article 4 Direction applies, you’ll need to apply for planning permission from the local authority before converting the property to HMO use, and there’s no guarantee it’ll be granted.

Article 4 Directions are now in force across many UK cities. Some lenders also apply their own restrictions on properties in Article 4 areas, so this is worth establishing early in your search.

Why the Right Broker Matters

The HMO mortgage market involves a number of specialist lenders, most of which don’t deal directly with borrowers. Reaching the right lender for your specific profile, whether that’s a first-time landlord, an experienced portfolio investor, or someone looking to borrow through a limited company, makes a real difference to both the terms available and the success of your application.

Applying to the wrong lender isn’t just inefficient. A declined application can affect your credit file and make subsequent applications harder. A whole-of-market broker such as ourselves can match your profile to the right lender before any application is submitted, and can manage the process through to completion.

If you’re looking at an HMO purchase or refinance, our team at Coreco Commercial can help you understand your options across the specialist lender market. Get in touch to discuss your circumstances.