Stamp duty on mixed-use property: when a home has non-residential space
Mixed-use stamp duty in brief
A purchase can use the mixed or non-residential SDLT rate table if it includes any land that is not residential property.
- Size does not decide the issue.
- HMRC says future plans do not decide suitability.
- Condition and use on the transaction date matter.
Scroll down for the full analysis.
Read the original guidance here:
Stamp duty on mixed-use property: when a home has non-residential space
Stamp duty on mixed-use property: when a home has non-residential space
If you buy a home with a shop, office, workshop or other non-residential area, stamp duty may use the mixed-property rates for the whole purchase. The size of that extra area does not decide the issue. Any legally non-residential part matters at completion.
What this rule is about
Stamp Duty Land Tax, often called stamp duty or SDLT, has different rate tables for residential purchases and mixed or non-residential purchases. A mixed purchase includes land that is not residential property.
You might assume the main use decides it. It does not. A very small non-residential part can change which rate table applies to the whole deal.
That can make a large difference to the tax bill.
What the official source says
HMRC’s manual says it considers a building’s actual use or its suitability for use at the time of the land transaction. It says the buyer’s plans and the seller’s plans do not decide this question.
- A building used as a home can count as residential property.
- A building suitable for use as a home can also count as residential property.
- Past use may help show what a building can be used for.
- Past use does not give the final answer if later changes have altered the building.
- HMRC says that, if an area is not residential, the purchase includes non-residential land.
- HMRC says the mixed or non-residential rate table then applies, however small that area is.
This is HMRC’s published view. The legislation defines residential property and directs the usual rate calculation to the mixed table where the land includes anything non-residential.
What this means in practice
Begin with the property as it stands on the relevant date. Do not begin with the estate agent’s description, the council tax record, or what you hope to do after moving in.
For example, calling a former shop a bedroom does not answer the question. Its present condition and practical use matter more.
- Check every building and distinct area included in the sale.
- Look at how each area works on the completion date.
- Record changes that converted space to, or away from, use as a home.
- Keep plans and photos that show the layout at that point.
For this purpose, the rule does not apportion the price between the home and the other area. If the purchase includes non-residential land, section 55 directs the usual calculation to the mixed table.
How to analyse it
Take one question at a time: what exactly are you buying, and what was each part like when the deal took effect? This avoids a common error of treating future plans as present facts.
- Identify all the land, buildings and parts of buildings in the contract.
- For each part, ask whether it was used as a home.
- Its suitability as a home then matters.
- Check whether recent alterations changed what the space could realistically be used for.
- Decide whether any part remains outside residential property.
- If it does, check the mixed or non-residential SDLT calculation.
What actually decides suitability? The facts on the ground. A plan to install a kitchen later may show an intention, but HMRC says intention does not make a space suitable now.
Example
Nadia buys a building for £480,000. Most of it is arranged and used as her future home. One small ground-floor area remains a working shop. It does not fit the residential definition on completion. Under HMRC’s view, the purchase includes non-residential land. The mixed or non-residential rate table applies to the whole £480,000 purchase, even though the shop area is much smaller than the home.
Change one fact and the answer may change. If alterations before completion mean that area has become suitable for use as part of the home, it may no longer be non-residential. The evidence of those alterations would matter.
Why this can be difficult in practice
A room that once served as a shop, office or workshop may, after later works have altered its layout, facilities and practical use, have changed completely. The old label is not decisive. Equally, an old label alone does not turn a usable home into commercial space.
This is where people go wrong: they focus on what they intend to do next. HMRC says the test looks at the building when the transaction happens.
- A listing description may not match the building’s real condition.
- Historic business use may be relevant, but it is not conclusive.
- Recent works can change the answer.
- A small non-residential area can still affect the rate table for the entire purchase.
The law extract used for this page records changes only up to 17 November 2025. Check the current primary legislation for a transaction after that date.
Key takeaways
- Mixed-use stamp duty can apply even where most of the property is a home.
- Look at the property on the transaction date, not future plans.
- Keep clear evidence of each area’s condition and use.
Technical analysis
For advisers, and for anyone who wants to check the law behind this page. You do not need this section to understand the guidance above.
Legislation
- FA 2003 section 116 — what counts as residential property
- FA 2003 section 55 — choosing residential or mixed-property rate tables
Official guidance
The pages below are HMRC’s guidance. Guidance is not law. It sets out how HMRC reads the legislation, and it is not binding on you, on a tribunal or on a court. Where guidance and the legislation differ, the legislation wins. HMRC can also change or withdraw guidance, and it may not cover your facts.
Where this is not settled
- Whether part of a building is suitable for use as a home can depend on its condition, layout, facilities and any changes made before the transaction.
- The supplied material does not give a full test for every mixed-use arrangement, such as separately let land or complex shared areas.
- For a transaction after 17 November 2025, the current legislation and rate rules need checking.
Evidence you would need
This kind of case is decided on the facts of the individual property. These are the records that usually settle it, and the ones an adviser would ask you for.
- Plans, photographs and particulars showing each part of the property on the transaction date
- Details of the building’s current layout, services and facilities
- Records of adaptations, works and actual previous use
- The contract and any documents showing what land forms part of the purchase
Explore this with an AI
Readers often want to test their own situation. Copy the prompt below into ChatGPT, Claude or Gemini. It hands the model the actual legislation for this page rather than letting it answer from memory, and tells it to be explicit about what is uncertain. What comes back is information, not advice – check it against the links above.
I am researching UK Stamp Duty Land Tax (SDLT), which applies in England and Northern Ireland. MY QUESTION Stamp duty on mixed-use property: when a home has non-residential space [Replace this with your own situation: what you are buying, the price, the dates, who the buyer is, and what you plan to do with the property.] THE LAW THIS TURNS ON - FA 2003 section 116 - what counts as residential property https://www.legislation.gov.uk/ukpga/2003/14/section/116/2025-11-17 - FA 2003 section 55 - choosing residential or mixed-property rate tables https://www.legislation.gov.uk/ukpga/2003/14/section/55/2025-11-17 Guidance page from HMRC on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm00395 HOW I WANT YOU TO ANSWER 1. Work from the legislation above. Read it before answering. Guidance from HMRC is its view of the law, not the law, and does not bind a tribunal or a court. 2. Tell me what the rule actually requires, in plain English. 3. Tell me which facts decide the answer, and which facts would change it. 4. Tell me what evidence I would need to support the position. 5. Be explicit about anything unsettled or fact-sensitive. Do not guess. 6. Your training data has a cutoff and SDLT rates and reliefs change at fiscal events. Say so if you are not sure the law is current. POINTS ALREADY KNOWN TO BE UNCERTAIN ON THIS TOPIC - Whether part of a building is suitable for use as a home can depend on its condition, layout, facilities and any changes made before the transaction. - The supplied material does not give a full test for every mixed-use arrangement, such as separately let land or complex shared areas. - For a transaction after 17 November 2025, the current legislation and rate rules need checking. Do not give me a conclusion you cannot support from the provisions above.
Legislation links show Finance Act 2003 as it stood on 2025-11-17. The law may have changed since, and the rules that apply are those in force on the date of your transaction. The official guidance this page is based on is here.
This page was last updated on 31 August 2026
Useful article? You may find it helpful to read the original guidance here: Stamp duty on mixed-use property: when a home has non-residential space
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