A shop with a flat above it is one of the more ordinary things to buy and one of the harder things to place. It is a single title holding two different kinds of property, which means it falls between two lending categories — and, depending on who ends up living upstairs, it may or may not be a regulated mortgage. That second point is the one worth understanding before you make an offer.
What counts as semi-commercial?
Semi-commercial — or mixed use — means one title with both commercial and residential parts, the classic being a shop with a flat above. A unit with offices or storage above, or a pub with living accommodation, works the same way.
It sits between two lending categories, which is exactly why it needs placing rather than shopping. A lender set up for pure commercial property and a lender set up for residential property are each being asked to look at half of something, and they do not all treat the split the same way.
Is a mortgage on a shop with a flat above regulated?
It depends on the building and on who is borrowing — unlike a purely commercial purchase, this is not a question with one answer.
A mixed-use mortgage can be regulated where at least 40% of the property, measured across the floor areas of each storey, is used or intended to be used as a home. In practice that matters where you or a close family member (a spouse or partner, parent, child, sibling, grandparent or grandchild) live there: where the residential part is let to a tenant, the loan is usually an investment property loan, which sits outside the regulated regime for a separate reason. Borrowing through a limited company sits outside it too, because the test applies to credit provided to an individual or to trustees. It turns on the specific building, who is borrowing, and who lives there, so ask us.
Either way the security is the whole building, shop and flat together. Your home or property may be repossessed if you do not keep up repayments on a mortgage or any other debt secured on it.
Source: Article 61(3)(a) and 61A, Regulated Activities Order 2001 — checked October 2026. https://www.legislation.gov.uk/uksi/2001/544/article/61
Does it matter who lives in the flat?
Yes, and it is the thing people are surprised by. Where you or a close family member occupy the residential part, the 40% test is the one that decides whether the loan is regulated. Where the flat is let to a tenant, the loan is usually an investment property loan instead, and sits outside the regulated regime by a different route.
The outcome can be the same — an unregulated loan — while the reason differs. That matters more than it sounds, because the reason is what a lender, a solicitor and a compliance reviewer each check. It also means a change of plan after completion is worth mentioning to us rather than left as a detail.
The test is measured across floor areas. For a building of two or more storeys that is the aggregate of the floor areas of each of those storeys, rather than the footprint it sits on.
What will a lender look at?
Both halves, plus how the building splits between them. On the commercial part it reads the lease and the tenant if the shop is let, or your accounts if you are trading from it yourself. On the residential part it looks at the flat much as it would any other.
Expect questions about the proportions — how much of the floor area is shop and how much is home — because that proportion is what decides which lending category the building belongs in. Have the floor areas to hand before you make an offer rather than after.
Where the shop is let, a lender relying on that rent will want the lease: how long is left to run, what the rent is and when it is reviewed, any break clauses, and who is responsible for repairs and insurance. A short remaining term, or a break clause coming up soon, may give a lender less to rely on.
Can I buy it through a limited company?
Yes, and it is a common way to hold a mixed-use building. Lenders are used to a company borrower and will usually want personal guarantees from the directors alongside it.
Borrowing through a company also sits outside the regulated regime, because the 40% test applies to credit provided to an individual or to trustees rather than to a company. That is a consequence of the structure, not a reason to choose it.
Whether to hold the building in a company, personally, or in a pension is a tax and structure question rather than a lending one. Speak to your accountant before you decide, because it is difficult to unpick later.
What if the flat is empty, or I plan to change the use?
Tell us at the outset, because an intention counts. The 40% test looks at what the property is used for or intended to be used for, so a flat you plan to move into and a flat you plan to let can point at different answers from the same floor plan.
Planning permission, change of use and what the title allows are questions for a solicitor. What each scenario looks like to a lender is one for us, and the two conversations are more useful run alongside each other than one after the other.
What does your advice cost?
Our standard fee is £495, payable when your application is submitted. In some more complex cases, an additional broker fee of up to 1% of the loan may apply. The first conversation is always free, and we always confirm your total fee in writing before any work starts.
We are also paid a procuration fee by the lender if your case completes, and we will tell you what it is before you proceed.
The short version
Semi-commercial means one title with both commercial and residential parts. It needs placing between two lending categories rather than shopping.
Whether the mortgage is regulated turns on the 40% floor-area test, on who is borrowing, and on who lives in the residential part.
A flat let to a tenant usually makes it an investment property loan; a company borrower sits outside the regulated regime for a different reason again.
Have the floor areas and the lease to hand before you make an offer.
Read next: buying your business premises with a commercial mortgage, or the mixed-use section of our commercial mortgages page.
Lawes Financial Limited (FRN 1046161) is an appointed representative of Andrew Charles Consulting Ltd, which is authorised and regulated by the Financial Conduct Authority (FRN 304904).