Buying a Flat Above a Shop: Mixed-Use SDLT Rates
A flat above a shop is classified as mixed-use property, meaning non-residential SDLT rates apply to the whole purchase — often saving thousands compared to residential rates.
Last verified: April 2026
Key Takeaways
- •A flat above a shop qualifies as mixed-use property — non-residential rates apply to the entire purchase.
- •Non-residential rates are capped at 5%, while residential rates reach 10% and 12% at higher values — the saving grows with price.
- •The 5% additional dwelling surcharge does NOT apply to mixed-use purchases.
- •HMRC must be satisfied the commercial element is genuine — a home office alone does not qualify.
- •There is no apportionment — the whole consideration is taxed at non-residential rates.
In this article
What Is Mixed-Use Property?
For SDLT purposes, mixed-use (or "mixed") property is a property that contains both a residential element and a non-residential element as separate, distinct parts. A flat above a shop is the most common example: the ground floor is used for commercial retail purposes, and the upper floor provides residential accommodation.
The key requirement is that the non-residential part must be genuinely non-residential in character and usage — or at least genuinely capable of non-residential use. HMRC looks at the physical layout and use of the property, not just what the buyer intends to do with it after purchase.
When HMRC is satisfied that a property is mixed-use, non-residential SDLT rates apply to the entire purchase consideration. There is no apportionment: you do not pay residential rates on the flat portion and non-residential rates on the shop portion. The whole purchase is taxed at the non-residential rate schedule.
What qualifies: A flat over a shop, a pub with owner accommodation, a farm with a farmhouse, a property with a separate commercial unit. A residential house with a home office or study does not qualify — the non-residential use must be in a distinct, physically separate part of the building.
Non-Residential SDLT Rates
Mixed-use property is charged at the non-residential rate schedule. These rates have three bands and are significantly lower than residential rates at higher price points:
| Band | Rate |
|---|---|
| £0 – £150,000 | 0% |
| £150,001 – £250,000 | 2% |
| Above £250,000 | 5% |
Compare this with residential rates which reach 10% above £925,000 and 12% above £1.5 million. At higher property prices, the non-residential rate structure represents a very significant saving.
No apportionment: The entire purchase price is subject to non-residential rates. HMRC does not split the calculation between the shop and the flat — the non-residential nature of any part of the property triggers non-residential rates for the whole transaction.
Worked Examples
Example 1: Purchase price £350,000
Non-residential (mixed-use) calculation:
| Band | Rate | Tax |
|---|---|---|
| £0 – £150,000 | 0% | £0 |
| £150,000 – £250,000 | 2% | £2,000 |
| £250,000 – £350,000 | 5% | £5,000 |
| Total (non-residential) | £7,000 | |
Saving vs. standard residential (£7,500): £500
Example 2: Purchase price £750,000
Non-residential (mixed-use) calculation:
| Band | Rate | Tax |
|---|---|---|
| £0 – £150,000 | 0% | £0 |
| £150,000 – £250,000 | 2% | £2,000 |
| £250,000 – £750,000 | 5% | £25,000 |
| Total (non-residential) | £27,000 | |
Saving vs. standard residential (£27,500): £500
Why does the saving grow? At £350,000, the residential rate caps at 5%. At £750,000, the residential rate reaches 10% — but non-residential stays at 5%. The gap widens considerably at higher prices.
Comparison with Residential Rates
The table below compares SDLT under non-residential (mixed-use) rates versus standard residential rates across a range of purchase prices:
| Purchase Price | Non-Residential (Mixed-Use) | Standard Residential | Saving |
|---|---|---|---|
| £300,000 | £4,500 | £5,000 | £500 |
| £500,000 | £14,500 | £15,000 | £500 |
| £750,000 | £27,000 | £27,500 | £500 |
| £1,000,000 | £39,500 | £43,750 | £4,250 |
Standard residential rates assume no first-time buyer relief and no additional dwelling surcharge.
The Surcharge Does Not Apply
The 5% additional dwelling surcharge (which applies when a buyer already owns a residential property and purchases an additional residential property) does not apply to mixed-use properties. The surcharge is explicitly linked to the higher rates for additional dwellings — a regime that applies only to residential property.
This is a major advantage for investors or buyers who already own a home. If you buy a flat above a shop and the purchase qualifies as mixed-use, you pay non-residential rates only — with no 5% surcharge on top.
Residential additional property (£500k)
£40,000
Standard residential + 5% surcharge
Mixed-use flat above shop (£500k)
£14,500
Non-residential rates, no surcharge
HMRC scrutiny: Because the mixed-use classification provides a significant tax advantage, HMRC examines these claims carefully. If the property is misclassified as mixed-use when it is actually purely residential, HMRC can raise an assessment for additional SDLT with interest and potentially penalties. Always obtain professional advice and document the commercial use clearly.
Frequently Asked Questions
What makes a property "mixed-use" for SDLT?
HMRC requires both residential AND non-residential parts to be present. The commercial part must be genuinely used (or capable of use) for non-residential purposes. A residential property with a home office does NOT qualify. The distinction must be physical and genuine — not merely cosmetic.
Does the additional dwelling surcharge apply to mixed-use?
No. The 5% surcharge applies only to residential property purchases. Mixed-use property is taxed at non-residential rates and is not subject to the additional dwelling surcharge, even if the buyer already owns another home.
What if the shop is vacant when I buy?
HMRC looks at whether the commercial element is physically present and capable of non-residential use, not whether it is currently occupied. A vacant but genuine commercial ground floor should still qualify. However, it is advisable to obtain evidence that the unit was last used commercially and could realistically be used commercially again.
Can I choose to be taxed at residential rates instead?
No. HMRC applies whichever classification is correct. If the property is genuinely mixed-use, non-residential rates are mandated by law. You cannot elect to be taxed at residential rates to access reliefs such as first-time buyer relief — the property must be wholly residential for those reliefs to apply.
Emma Richardson, MRICS
Chartered Surveyor & Property Tax Specialist
Emma Richardson is a RICS-qualified Chartered Surveyor with over 12 years of experience in UK property taxation. She founded Calculate My Stamp Duty UK to help buyers understand the complex world of property transaction taxes.
Ready to see your numbers?
Use our free calculator to see exactly how much stamp duty you need to budget for.
Check your stamp duty liability