When an unfinished or off-plan property counts as a home for SDLT
In brief
An unfinished or off-plan property may count as a home for the Schedule 4A SDLT higher charge. The result depends on the contract, timing of payment or possession, construction status and related land or rights.
- Off-plan purchases can be caught before work begins.
- Gardens and separate garages can form part of the home.
- Contemporaneous contracts, plans and construction records matter.
Scroll down for the full analysis.
Read the original guidance here:
When an unfinished or off-plan property counts as a home for SDLT
When an unfinished or off-plan property counts as a home for SDLT
An unfinished or off-plan property can still count as a home for the special SDLT higher charge that can affect companies and similar buyers. Stamp duty may therefore be due before anyone can move in.
The key facts are the contract, the work done by the relevant date, and any land or rights sold with the property.
What this rule is about
Schedule 4A contains a separate higher SDLT charge for some high-value home purchases by companies and similar buyers. This page explains one part of that test: what counts as a home.
You might assume an empty plot cannot be a home. That is not always right. The legislation includes a building, or part of one, while it is being built or adapted for use as one home.
That distinction can matter greatly. The tax analysis may therefore begin before the finished property exists.
What the official source says
The law says a building, or part of a building, counts if it is used as one home, is suitable for that use, or is in the process of being built or adapted for it.
- Garden and grounds for the home count.
- Buildings and structures on that garden or grounds also count as part of it.
- Land or rights that exist, or will exist, for the home’s benefit can also count.
- A garage block space can count too. It need not touch the home.
- For an off-plan contract, an interest in the planned home can count before construction starts.
For that off-plan rule, three things must be true. The contract must have reached substantial performance. This broadly means the point when the tax system treats the contract as effective because of possession or payment.
The contract must provide for one home. That home must be built or adapted.
Work must not yet have started when that point is reached.
HMRC’s manual also says that, for a block of flats, the relevant construction test is applied to the building as a whole. On HMRC’s view, all flats are then treated as being built at that stage. This can apply where there is a shop on the ground floor and flats above.
What this means in practice
Paying for a planned flat early does not necessarily keep it outside this part of the SDLT rules. The question is not simply whether walls, a kitchen or a front door were in place.
- Check what the contract says the developer must build or adapt.
- Fix the date when the contract was substantially performed.
- Find out whether any construction or adaptation had begun by then.
- Include linked facilities, such as a separate garage, where they are for the home’s benefit.
- Do not rely only on the estate agent’s description of the property.
There is a limit which the short HMRC page does not explain in detail.
Some institutional accommodation is excluded. Hotel and similar accommodation is excluded too.
A building used in that way cannot be brought back into the test merely because it could physically be used in another way.
How to analyse it
Start with the documents and the date. Then work through the property as it stood, or was contractually due to stand, at that point.
- Is the transaction one where the Schedule 4A higher charge is potentially relevant?
- What building or part of a building does the contract cover?
- Was it already used as one home or suitable for that use?
- If not, was it being built or adapted for that use?
- For an off-plan contract, had building work started when substantial performance occurred?
- What garden, grounds, garages, parking rights or other land came with it?
- Is that extra land genuinely enjoyed with, or held for the benefit of, the home?
What actually decides a separate garage? Its distance alone does not decide it.
Look at the title, rights, plans and link. Consider the real link between the garage and the flat.
Example
Northfield Homes Ltd agrees to buy an off-plan flat for £650,000. The contract says the developer will build the flat as one home and grant a right to use a numbered garage space.
Northfield pays the full price before work starts. If that payment means the contract has been substantially performed, the planned flat can count under the off-plan rule even though construction has not begun.
The garage right may also count if it is for the flat’s benefit. Whether the separate higher charge applies still depends on all of its other conditions.
Why this can be difficult in practice
These cases often turn on timing and paperwork. A later photograph may show a finished flat, but the important question can be what had happened when the contract became effective for SDLT.
- People may confuse an empty site with land that cannot count as a planned home.
- A construction start date may be unclear where enabling works happened first.
- A plot plan may not make clear whether a parking space or garage was included.
- Described grounds can have separate uses. Another person may hold rights.
- HMRC’s statement about whole blocks is its view in guidance, not extra wording in the Act.
Keep records made at the time. A later account of what the parties intended is less useful than the signed contract, payment evidence and dated construction records.
Key takeaways
- A planned home can count for this SDLT test before building work starts.
- Early payment can bring the contract into the SDLT rules before completion.
- Gardens, garages and separate rights may be part of the home if they serve it.
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 4A para 7 — when a property counts as a home
- FA 2003 section 44 — when a contract is substantially performed
- FA 2003 section 116 — special rules for institutional and hotel accommodation
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 land is or will be garden or grounds is a question of fact.
- Whether a detached garage or other separate land exists for the benefit of the home depends on its rights, use and connection to the property.
- The construction position for a block of flats is HMRC’s stated interpretation and is not itself a separate rule written into the legislation.
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 and any side agreements — what was promised, including planned building work and any garage or land included
- Completion statement and bank records — when the price was paid and whether the contract may have been substantially performed
- Developer’s construction programme and site records — when work began on the building and the stage reached at the relevant date
- Dated site photographs and aerial images — the physical state of the site and whether construction had started
- Planning permission, approved plans and conditions — the proposed use, layout and extent of the planned homes
- Sales plans, specifications and marketing material — whether the contract was for a single home and what land or facilities went with it
- Land Registry titles and filed plans for every parcel — the land and rights bought, including any separate garage or parking space
- Garage lease, licence or management-company papers — whether a separate garage or parking right exists for the benefit of the home
- Council tax and business-rates records — how the property or part of it was recorded, although these records do not decide the tax answer
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 When an unfinished or off-plan property counts as a home for SDLT [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 4A para 7 - when a property counts as a home https://www.legislation.gov.uk/ukpga/2003/14/schedule/4A/paragraph/7/2025-11-17 - FA 2003 section 44 - when a contract is substantially performed https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 116 - special rules for institutional and hotel accommodation https://www.legislation.gov.uk/ukpga/2003/14/section/116/2025-11-17 Guidance page from HMRC on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm09520 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 land is or will be garden or grounds is a question of fact. - Whether a detached garage or other separate land exists for the benefit of the home depends on its rights, use and connection to the property. - The construction position for a block of flats is HMRC's stated interpretation and is not itself a separate rule written into the legislation. 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: When an unfinished or off-plan property counts as a home for SDLT
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