Finance for large and sui generis HMOs

Size is the dividing line. A house let to three to six unrelated sharers generally sits within the C4 use class or permitted development. Once you reach seven or more sharers, the property is treated as sui generis, a use class of its own, and usually needs full planning permission rather than relying on permitted development rights.

Large and professional HMOs tend to share some features:

• Seven or more lettable rooms, often with en suites or a higher specification.
• More extensive communal space, fire safety and management arrangements.
• A mandatory HMO licence and, in some areas, additional or selective licensing on top.
• Sometimes an Article 4 direction locally, removing permitted development for smaller HMOs and pushing more schemes through full planning.

These are held almost entirely by companies and professional investors as income assets, so the lending is unregulated and outside the FCA's regulated-mortgage perimeter. Where a deal is tied to a property connected to the borrower's own home, it can be regulated, and we refer those cases to an appropriately authorised firm. Planning and use class questions should be checked with your local authority and a planning professional. Nothing here is advice.

The biggest practical difference is how these houses are valued. A small HMO can often be valued as bricks and mortar, close to what similar houses fetch nearby. A large or sui generis HMO is usually valued on a commercial or investment basis, driven by the income it produces rather than by comparable house sales.

On an investment valuation, a surveyor capitalises the net rent at a yield to arrive at value. That means a well run house with strong, evidenced room income can be worth considerably more than its bricks and mortar figure, but it also means the value hangs on the income holding up. A period of voids or a fall in achievable rent feeds straight into the valuation.

This matters for two reasons. First, the loan is sized against that commercial value, so the quality and evidence of your income directly affect how much you can borrow. Second, the valuation basis can create a gap between what you paid to build or buy and what the house values at on a lender's investment approach, which is why presenting clear, documented rents and management arrangements makes such a difference to the outcome.

Every large HMO needs a mandatory licence, and lenders will want to see that it is in place or clearly obtainable. Many councils also run additional or selective licensing schemes that widen the net, and a sui generis house of seven or more rooms sits firmly within mandatory licensing wherever it is.

Licensing brings standards that a lender reads as risk signals. Room sizes, amenity ratios, fire detection and compartmentation, and the fit and proper status of the licence holder all sit behind the licence. A house that meets these comfortably looks like a lower risk to fund; one with outstanding conditions or borderline room sizes looks like a harder case and can affect both the appetite to lend and the terms.

Management matters too. Large HMOs are more intensive to run, with more tenants, more turnover and more compliance, so lenders like to see either a capable landlord or a professional managing agent. Where licensing conditions are outstanding or a change of use is still to be regularised, we flag it early and present the plan to resolve it, because being straight about the position almost always produces a better result than glossing over it.

The appeal of large HMOs is income. Letting seven or more rooms individually usually produces materially higher gross rent than a single family let of the same building, and the yield on a well run house can be strong. That income is what supports the commercial valuation and what makes the rental stress test comfortable.

The other side of the coin is that the income is harder won. More rooms mean more voids to manage, more wear, higher running costs, more intensive compliance and more management time. The gross figure looks impressive, but the net figure after voids, bills, licensing and management is the number that actually services the debt and drives the valuation.

Lenders know this, so they underwrite the net position rather than the headline gross. A house that runs at high occupancy with sensible costs and a clear management arrangement will support more debt on keener terms than one with an optimistic rent roll and thin evidence. When we present a large HMO, we focus on the demonstrable net income and the track record behind it, because that is what moves a specialist lender from cautious to comfortable.

Large and sui generis HMOs are a specialist corner of the market, and fewer lenders compete in it. Many mainstream buy to let lenders cap out at six bedrooms or step back from anything valued on a commercial basis, so the field narrows to specialist and commercial lenders who understand these houses.

Less competition, and a more complex asset, tend to show up in pricing. As an indicative guide, term finance on a large or sui generis HMO sits broadly in the region of 5.5% to 6.5% a year, with leverage up to around 70% to 75% of value and an interest coverage requirement typically from 125% to 145% depending on the borrower's tax position. Larger, more complex houses often price towards the firmer end of those bands. Where a purchase or refurbishment needs short term funding first, HMO bridging runs broadly around 0.75% to 1.1% per month. These are indicative bands, subject to status and valuation, not offers.

Because the pool of willing lenders is smaller, presentation and placement matter more here than almost anywhere in HMO lending. Putting the case to the right specialist, with the licence, the planning position, the valuation basis and the net income all set out clearly, is what earns the keener end of the range. We know which lenders are comfortable with seven rooms and up, and we place accordingly. Nothing here is financial, legal, planning or tax advice.

The more detail you share up front, the more accurately we can place a large or sui generis case with a lender that genuinely wants it. Because the field is narrow, getting the right paperwork in front of the right lender first time saves both time and pricing.

It helps to send:

• The address, the number of lettable rooms and whether the use is C4 or sui generis.
• The licence position, including any mandatory, additional or selective licensing and any outstanding conditions.
• The planning status, including any change of use or Article 4 considerations.
• An evidenced rent roll and running costs, so we can show the net income.
• Whether you are buying, refinancing or funding works, and the entity borrowing.

We will come back with an indicative view on leverage and pricing within the bands on this page, then work the specialist market on your behalf. We arrange the finance and place it with lenders; we do not lend ourselves. These are indicative bands rather than a quote, and the final terms depend on the house, its income, its licence and its planning position. Nothing here is financial, legal, planning or tax advice.