Property Type Classifier
Residential, non-residential, or mixed-use? Your property's SDLT classification determines which rate table applies and whether the 5% surcharge can apply at all.
Last verified: March 2026 · Covers England & Northern Ireland SDLT
Key Takeaways
- •HMRC tests whether a property is "suitable for use as a dwelling" — not whether it is currently occupied.
- •Mixed-use properties are taxed at non-residential rates (0%/2%/5%) and are exempt from the additional dwelling surcharge.
- •Derelict properties are generally still classified as residential unless they cannot be made suitable for living.
- •HMRC actively challenges mixed-use claims — a home office alone does not create mixed-use status.
- •Classification is a fact-based test. Professional advice is recommended before filing a mixed-use SDLT return.
In this article
How to Use This Tool
- 1Answer all five questions about the property — some use multi-select checkboxes.
- 2Click "Classify My Property" to see your residential, commercial, or mixed-use result.
- 3Enter the property price to see an SDLT comparison across classifications.
- 4If you receive a mixed-use result, read the HMRC scrutiny warning carefully before proceeding.
- 5This tool provides guidance only. Always confirm classification with a property tax specialist.
Property Type Classifier
Please answer all questions to get your result.
Understanding Your Results
Residential
Standard SDLT bands apply (0%/2%/5%/10%/12%). The 5% additional dwelling surcharge may also apply if you already own a property. Use the main calculator.
Non-Residential / Commercial
Commercial SDLT rates apply (0% up to £150k, 2% to £250k, 5% above). No additional dwelling surcharge. Typically lower than residential rates on higher-value properties.
Mixed Use
Non-residential rates apply (same as commercial). No additional dwelling surcharge. Can produce significant savings — but HMRC scrutinises these claims closely.
HMRC Classification Rules
HMRC determines property classification for SDLT purposes using the "suitable for use as a dwelling" test in Finance Act 2003, s116. The key question is not whether the property is currently lived in, but whether it is suitable to be lived in.
Residential Property
A building is residential if it is used or suitable for use as a dwelling, or is in the process of being constructed or adapted for such use. This includes houses, flats, bedsits, and student accommodation. Garden and grounds forming part of the residence are also treated as residential.
Non-Residential (Commercial) Property
Anything that is not residential is non-residential for SDLT. This includes shops, offices, warehouses, factories, hotels, and agricultural land where there is no residential dwelling. Agricultural land exceeding 0.5 hectares with no attached dwelling is typically non-residential.
Mixed-Use Property
A transaction includes both residential and non-residential elements. The classic example is a flat above a shop. Critically, the entire transaction (including the residential element) is taxed at non-residential rates — making mixed-use classification potentially very valuable.
The "suitable to live in" test: Even if a property is empty or needs renovation, HMRC will generally classify it as residential if it could reasonably be made habitable. Only properties that are structurally beyond repair — or have been permanently converted to commercial use — might escape residential classification.
Mixed-Use Claims: HMRC Scrutiny
Mixed-use classification can produce large SDLT savings, which is why HMRC actively investigates these claims. In recent years, HMRC has won numerous First-tier Tribunal cases challenging mixed-use filings.
Hyman v HMRC [2021]
A small paddock attached to a residential property was held not to create a mixed-use transaction. HMRC won. The commercial element must be genuinely non-residential.
Goodfellow v HMRC [2022]
Established criteria for genuine non-residential use. The commercial element must be separately identifiable, not merely incidental to the residential use.
Penalty Risk
Deliberately claiming mixed-use on a residential property to reduce SDLT is treated as tax evasion. Penalties can reach 100% of the understated tax. HMRC's compliance teams specifically review mixed-use SDLT returns. Always obtain professional advice.
Example Scenarios
Scenario 1: 3-bed house with garden
Standard residential property. Entirely suitable for living. SDLT at standard residential rates. Surcharge may apply if additional property.
Scenario 2: Shop with 2-bed flat above (separate entrance)
Both commercial and residential elements are genuine and separately identifiable. Non-residential rates apply. No surcharge.
Scenario 3: Derelict cottage, needs roof repair
HMRC default: uninhabitable properties that could be made suitable for living are still residential. Standard SDLT applies.
Scenario 4: Farmhouse with 10 acres (actively farmed)
If the land is genuinely agricultural (actively farmed, not just amenity land), it creates a mixed-use transaction. HMRC scrutiny applies.
Scenario 5: Office building, no residential element
Purely commercial property. Commercial SDLT rates apply (0%/2%/5%). No additional dwelling surcharge.
Scenario 6: 3-bed house with a room used as home office
A home office within a residential dwelling does NOT create mixed-use. The commercial element must be a separate unit with its own entrance.
Frequently Asked Questions
Is a flat above a shop always mixed-use?
Generally yes, if both elements are genuine and separately identifiable. A flat above a functioning shop with its own entrance is typically mixed-use. However, if the shop has been converted to residential use, the whole property may be residential.
Can I claim mixed-use rates if my house has a home office?
No. A room used as a home office within a residential property does not make it mixed-use. The commercial element must be a genuinely separate unit — such as a shop, surgery, or agricultural building.
Are derelict properties taxed as residential or commercial?
HMRC classifies derelict properties as residential unless they cannot be made suitable for living. A property that needs renovation is still residential. Only properties that are structurally beyond repair might qualify as non-residential, and even this is contested.
Why does mixed-use classification save money?
Mixed-use properties are taxed at non-residential rates (0% to £150k, 2% to £250k, 5% above). More importantly, the 5% additional dwelling surcharge does NOT apply to mixed-use purchases. For a £500k additional property: residential SDLT = £37,500, mixed-use = £14,500 — saving £23,000.
Should I try to classify my property as mixed-use to save tax?
Only if the classification is genuinely accurate. HMRC actively investigates mixed-use claims and has won numerous tribunal cases. Penalties for incorrect claims can be severe. Always get professional advice before claiming mixed-use.
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 Stamp Duty Calculator to help buyers understand the complex world of property transaction taxes.