Buying two homes at once: when the extra 5% stamp duty applies
Buying more than one home
For an individual buying two or more homes in one deal, the higher stamp duty rates can apply to the entire purchase.
- At least two homes must pass three conditions.
- The £40,000 value split and subsidiary-home test are central.
- Failing paragraph 5 may still leave another statutory test to consider.
Scroll down for the full analysis.
Read the original guidance here:
Buying two homes at once: when the extra 5% stamp duty applies
Buying two homes at once: when the extra 5% stamp duty applies
Buying two homes in one deal can place the extra 5% stamp duty charge on the whole purchase when at least two homes pass the three conditions. The smaller home cannot be considered alone.
What this rule is about
This rule concerns an individual buying two or more homes in a single deal. It may involve a house and an annexe, a main house and a coach house, or flats in the same building.
The purchase remains one deal. It cannot be divided between normal and higher stamp duty rates, even if one home might appear to qualify for normal rates when considered by itself. The rates attach to the deal.
The distinction may sound technical. It can alter the bill by a large amount.
What the official source says
HMRC’s manual says that, where at least two homes meet conditions A, B and C within a single deal, paragraph 5 makes the whole deal a higher-rates transaction. The entire transaction is affected.
- Condition A: at least £40,000 of the amount paid must fairly relate to each home.
- Condition B: you must not be buying only the future interest after a lease with more than 21 years left to run.
- Condition C: the home must not be subsidiary to another home in the same deal.
- A home can be subsidiary if it is in the other home’s building or grounds.
- It must also pass a value test: the other home’s fair share is at least two-thirds of the combined value set by the legislation.
The manual provides HMRC guidance rather than the law itself. Paragraph 5 of Schedule 4ZA is the legal test.
What this means in practice
Small annexes are not automatically ignored. Location, the value split and the lease position all matter.
If two homes pass all three conditions, the higher stamp duty rates apply across the entire deal rather than separately to each home, even though the purchase consists only of homes. There is no split result.
- Identify every separate home included in the contract.
- Split the total price fairly between them.
- Check any lease affecting each home on completion day.
- Check whether one home sits in the building or grounds of another.
- Keep evidence supporting the price split and the layout.
If just one home passes the three conditions, paragraph 5 does not apply. That may not end the question. The legislation contains a separate test for some purchases where only one home passes.
How to analyse it
Start with the property bought. Later plans, titles and the contract can matter more than the estate agent’s label when the conditions are applied to the transaction. Future intentions do not control.
- Was the buyer an individual?
- Did one transaction include two or more separate homes?
- What fair amount of the total price belongs to each home?
- Does at least £40,000 belong to each of two homes?
- Is either home subject to a lease with more than 21 years left?
- Is either home within the same building or grounds as the other?
- Does the statutory two-thirds test make one home subsidiary?
- If only one home passes, does the separate paragraph 6 test need checking?
This is where people often go wrong: the value test for a subsidiary home is not simply a question of which building appears larger. A fair, supportable price split matters.
Example
Janet buys a detached house and a separate coach house in its grounds for £1 million, and a fair valuation puts £350,000 of the price on the coach house. Neither property has two-thirds or more of the combined £1 million value. Assuming both pass the lease test, both homes pass conditions A, B and C. Under paragraph 5, the higher stamp duty rates apply to Janet’s whole purchase.
Why this can be difficult in practice
A separate front door settles nothing. Nor does describing a building as an annexe, flat or coach house. The outcome depends on the property bought and the facts at completion.
For example, where a £1 million town house includes a basement flat worth £250,000 and the town house has the remaining £750,000 value, the basement flat can be subsidiary. Paragraph 5 would not apply. In that example, only one home passes all three conditions.
- A price split invented after completion may carry little weight.
- One title can still include more than one separate home.
- Separate titles do not automatically prevent one home being subsidiary.
- A lease must be checked as it stood on the relevant day.
- Land described as grounds may need careful checking against plans and use.
- The other multiple-home test may still matter where paragraph 5 fails.
Key takeaways
- Two qualifying homes can bring the higher rates onto the whole deal.
- Each of two homes must pass the £40,000, lease and subsidiary tests.
- Get the plans, leases and valuation evidence before deciding the stamp duty position.
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 Schedule 4ZA para 1 — higher rate calculation for qualifying residential purchases
- FA 2003 Schedule 4ZA para 2 — when a purchase counts as a higher rates transaction
- FA 2003 Schedule 4ZA para 5 — test for individuals buying two or more homes
- FA 2003 Schedule 4ZA para 6 — alternative test where only one home qualifies
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 a building or part of a building is a separate home can depend on its layout, facilities and use at the relevant date.
- A fair split of the amount paid between homes may need valuation evidence.
- Whether land is within another home’s grounds can be fact-sensitive.
- Failing the paragraph 5 test does not by itself rule out the separate paragraph 6 test.
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.
- Signed contract, transfer and completion statement — what was bought together, the total price and completion date
- Land Registry titles and filed plans — each parcel, building and legal interest included in the deal
- Sales particulars, brochure and dated photographs — how the property and any separate home were presented at sale
- Floor plans, survey and measured areas — whether there are separate living spaces and their physical layout
- Independent valuation or valuation breakdown — a fair split of the price between the homes
- Copies of any leases, licences or tenancy agreements — whether a lease existed and how long it had left to run
- Council tax records and utility account information — whether each part was treated and used as a separate home
- Planning history and building-control records — the approved use, conversion history and physical works
- Replies to property enquiries and seller statements — what the seller said about occupation, access and boundaries
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 Buying two homes at once: when the extra 5% stamp duty applies [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 Schedule 4ZA para 1 - higher rate calculation for qualifying residential purchases https://www.legislation.gov.uk/ukpga/2003/14/schedule/4ZA/paragraph/1/2025-11-17 - FA 2003 Schedule 4ZA para 2 - when a purchase counts as a higher rates transaction https://www.legislation.gov.uk/ukpga/2003/14/schedule/4ZA/paragraph/2/2025-11-17 - FA 2003 Schedule 4ZA para 5 - test for individuals buying two or more homes https://www.legislation.gov.uk/ukpga/2003/14/schedule/4ZA/paragraph/5/2025-11-17 - FA 2003 Schedule 4ZA para 6 - alternative test where only one home qualifies https://www.legislation.gov.uk/ukpga/2003/14/schedule/4ZA/paragraph/6/2025-11-17 Guidance page from HMRC on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm09766 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 a building or part of a building is a separate home can depend on its layout, facilities and use at the relevant date. - A fair split of the amount paid between homes may need valuation evidence. - Whether land is within another home's grounds can be fact-sensitive. 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: Buying two homes at once: when the extra 5% stamp duty applies
Search Land Tax Advice with Google
