Semi Commercial Mortgage Guide for a Shop With a Flat Above: Specialist Help in 2026
You have run the bakery, the barber’s or the pharmacy from the same ground floor for years, and the landlord has finally offered to sell you the freehold, flat upstairs included. Or you have spotted a corner unit with a two-bedroom flat over it in the high street you already trade on. Either way, a plain commercial loan does not quite fit and a home loan certainly does not. What you need is a semi commercial mortgage: finance for a building that is part business, part home, where the lender has to price both halves and decide whether the flat changes the rules.
Business Mortgages Broker is a trading name of Lenzie Consulting Ltd (company number 08174104), and we arrange business mortgages for companies buying or refinancing the premises they trade from. We are a broker, not a lender. Commercial lending to a limited company is unregulated and falls outside the FCA’s regulated mortgage perimeter. Where a deal would be regulated, for example lending to a sole trader or individual, or a property where the borrower or a close family member will live in part of it, we refer it to an appropriately authorised firm. That last sentence matters more here than anywhere else on our site, as you will see below.
In the episode below, Georgina takes the shop-and-flat question apart: how the value is split and when the flat upstairs pulls a loan into the regulated world.
What makes a building semi-commercial?
A semi-commercial property is a single building, on one title, that combines residential and commercial space used for business purposes and as a home. The textbook case is a shop with a flat above, but the category is broader:
- A high-street retail unit with one or more flats on the upper floors.
- An office or surgery with a self-contained maisonette.
- A café or takeaway with living space behind or above.
- A pub or restaurant with a manager’s flat, where the trade is secondary to the bricks.
Lenders use “semi-commercial property” and “mixed-use property” almost interchangeably. What they share is that two different valuation methods, and two different sets of law, apply to one asset. So what is the difference between commercial and semi-commercial? A purely commercial building has no dwelling in it. Once part of it is a home, the residential element changes the valuation, the tenancy law, the stamp duty treatment and, sometimes, the regulatory position.
How does a lender split the shop value from the flat value?
The valuer reports a figure for the whole property, but most lenders offering semi-commercial mortgages also want to see how that figure is made up. The commercial part is valued on its rent and lease, or on its rental value if you will occupy it yourself. The residential part is valued by comparison with similar flats nearby, or on its rent if it is let.
Why the proportions matter
Lending criteria commonly look at the share of value that sits in each part. A building where the residential element dominates may be treated more like a residential investment, and some commercial lenders will step back. A building where the shop is most of the value is read as a commercial asset with a flat attached. There is no single cut-off across commercial criteria, so we check the proportions against each lender’s requirements before an application goes in.
Illustrative example. A corner shop with a two-bedroom flat above is bought for £400,000. The valuer puts £250,000 on the shop and £150,000 on the flat, so the commercial element is 62.5% of the value. At 75% loan to value the loan is £300,000 and the deposit is £100,000, before fees and tax.
Things that shift the split
- Access. A flat with its own street door is worth more, and lends more easily, than one reached only through the shop.
- The use downstairs. Hot food, late licences and noisy trades can reduce what the flat is worth and narrow the pool of lenders.
- Fire separation and condition. Valuers note whether the flat is properly separated from the commercial unit and fit to let.
- Title. Flats already sold off on long leases change the security entirely.
Mixed-use mortgage rates and loan to value in 2026
Semi-commercial finance usually prices between a standard owner-occupier premises loan and a full trading-business case. Our indicative band is 6.5 to 8.5% a year, with loan to value up to 75%, terms of 5 to 25 years and arrangement fees typically 1 to 2% of the facility. All semi-commercial mortgage rates here are indicative, subject to status, accounts and valuation. Interest rates on these products move with the credit and the building, so consider the whole case rather than the headline figure.
| Feature of the case | Nearer 6.5% | Nearer 8.5% |
|---|---|---|
| Borrower | Established limited company, clean credit | Newer company, thin accounts or adverse credit |
| Commercial use | Shop or office in a busy parade | Hot food, vacant unit or specialist use |
| Residential element | Self-contained, separate access, let | Internal access only, poor condition |
| Loan to value | 60% or lower | Close to 75% |
Rates are set as a margin over Bank Rate, which the Bank of England decides, or fixed for a period. A semi-commercial mortgage is a commercial product, so it is priced on the credit, the building and the lender’s appetite, not on residential mortgage product tables.
Illustrative example. On the £300,000 loan above, interest at 7.5% a year is £22,500 a year, or £1,875 a month on an interest-only basis. At 6.5% it would be £19,500 a year; at 8.5%, £25,500. Run your own figures on our business mortgage calculator.
When does the flat upstairs bring the loan into regulation?
This is where a semi commercial mortgage differs most from every other loan we arrange. Under the Regulated Activities Order, a loan secured on land is a regulated mortgage contract where the borrower is an individual or trustee and at least 40% of the land is used, or intended to be used, as a dwelling by the borrower or a related person, such as a spouse, partner, parent, child or sibling.
In practice that gives three broad positions:
- A limited company borrows and the flat is let to an unrelated tenant. This is unregulated commercial lending, outside the Financial Conduct Authority’s mortgage rules, and it is the work we do.
- You, or a close family member, will live in the flat. The deal may well be regulated, depending on who borrows and how much of the building is a home. The rules are technical, so we do not try to judge the edge: we refer it to an appropriately authorised firm.
- An individual or sole trader borrows, even with the flat let. Lending to individuals can bring in other consumer credit and mortgage rules, so this also goes to an authorised firm. You can check any firm’s permissions on the Financial Services Register before you proceed.
The test is about how the building is used and by whom, so changing plans halfway through matters. If you buy through a company with the flat let, then move a son or daughter in a year later, tell the lender and take advice before you do.
Trading from the shop or letting it: two different applications
Two people can buy identical buildings and make completely different applications.
The owner-occupier trader
If your own company will trade from the shop, the lender underwrites the business. It reads your accounts to see whether profits cover the interest, looks at how long you have traded and treats the flat rent, if any, as extra income. This is close to an owner-occupied commercial loan, and our page on owner-occupier mortgages for trading companies covers that side in more depth. Some owners buy the building personally or in a separate property company and lease the shop to their trading company; that structure needs a proper commercial lease between the two, and your accountant should look at the tax.
The investor
If both the shop and the flat will be let, the lender underwrites the rent. It wants to see the commercial lease, the residential tenancy, the rental income and how comfortably it covers the interest. An investment case leans on tenant quality and lease length rather than your trading record, and lenders that specialise in investment properties may offer different products from those that suit an owner-occupier.
The semi-commercial premises finance page on our main site sets out how we approach both kinds of buyer.
Stamp duty on a shop and flat purchase
Here the mixed-use building often has an advantage. In England and Northern Ireland, HMRC taxes a purchase that includes both residential and non-residential parts at the non-residential and mixed rates, not the residential ones, and Revenue Scotland and the Welsh Revenue Authority apply the same principle to LBTT and LTT. Rates as at October 2026; check the current rates before you buy.
| Portion of the price | SDLT (HMRC) | LBTT (Revenue Scotland) | LTT (Welsh Revenue Authority) |
|---|---|---|---|
| First slice | 0% up to £150,000 | 0% up to £150,000 | 0% up to £225,000 |
| Second slice | 2% to £250,000 | 1% to £250,000 | 1% to £250,000 |
| Above £250,000 | 5% | 5% | 5% to £1,000,000, then 6% |
Illustrative example. On the £400,000 shop and flat, SDLT under HMRC’s rates is £0 on the first £150,000, £2,000 on the next £100,000 and £7,500 on the final £150,000: £9,500 in total. The same price in Scotland gives £8,500 of LBTT, and in Wales £7,750 of LTT. Lenders do not add the tax to the loan, so it comes out of your own cash alongside the deposit.
Our guide to stamp duty on commercial property covers leases, VAT and filing deadlines. We are not tax advisers, so confirm the figure on your own purchase with your solicitor.
Valuation, the commercial lease and the residential tenancy
Because a semi-commercial building carries two kinds of occupation, the legal pack is heavier than for a single-use unit. Expect the lender’s solicitor to check:
- The commercial lease, if the shop is let: rent, term, break clauses, repairing obligations and whether it is protected under the Landlord and Tenant Act 1954.
- The residential tenancy. In England the type of tenancy is set by housing law that is changing under the Renters’ Rights Act, Wales uses occupation contracts, and Scotland uses private residential tenancies. Each affects how easily a lender could take possession.
- Licensing and safety. Gas safety and electrical certificates for the flat, and any HMO licence if it is shared.
- Title and registration. The legal charge is registered at HM Land Registry, and where the borrower is a company it must also be registered at Companies House within 21 days of creation.
Valuers working to RICS standards will comment on the condition of each part, the access arrangements and the demand from both commercial and residential buyers. Leave enough time for this stage of the process: it is where most semi-commercial deals slow down, and where lenders most often require extra documents.
Semi-commercial questions we hear most
What are the current rates for semi-commercial mortgages? Our indicative band is 6.5 to 8.5% a year, up to 75% loan to value, subject to status, accounts and valuation. The rate on an offer depends on your accounts, the building and the use of the shop.
How difficult is it to get a commercial mortgage on a shop with a flat? No harder than a plain commercial unit, if the building is self-contained, the borrower is a company and the paperwork is in order. It gets harder with internal access only, a hot food use, very short trading history or a flat a family member will live in.
Can I use bridging finance on a semi-commercial building? Yes, where the property needs work or planning permission before a term lender will accept it, or a purchase must complete quickly. A bridging loan is short-term finance and costs more, so it needs a clear exit onto a semi commercial mortgage or a sale.
Do Muslims get 0% mortgages? Sharia-compliant property finance does not charge interest, but it is not free. It is structured as a lease or a shared-ownership arrangement where the provider earns rent or profit instead. Islamic commercial products exist for business premises, though the choice is narrower than for conventional semi-commercial mortgages.
How much can I borrow? Up to 75% of the lower of price and valuation, provided your accounts or the rent cover the interest. Lenders consider both parts of the building when they decide.
Do I need a specialist lender for semi-commercial mortgages? Not always. Some high-street banks lend on mixed-use buildings for existing business customers; challenger banks and specialist lenders cover the cases they decline.
Talk to us
If your company is buying a shop with a flat above, or refinancing one it already owns, send us the address, the split of uses and your latest accounts, and we will tell you how lenders are likely to treat it, and whether the flat puts it outside what we arrange. Start at Business Mortgages Broker.
All figures in this article are indicative ranges for October 2026, not an offer or a quote, and any loan is subject to status, accounts, valuation and the lender’s own underwriting. We are not tax, legal or pension advisers, and anything regulated is referred to an appropriately authorised firm.