Land Transaction Tax housebuilder relief when you part-exchange a home lived in within 2 years
Housebuilder part-exchange relief
A housebuilder may receive LTT relief when it buys your old home as part of selling you a qualifying new home. The relief depends on linked deals, your past and intended main-home use, and the amount of land involved.
- The old home must have been your main or only home within two years.
- You must intend the new home to be your main or only home.
- Extra land may result in partial relief.
Scroll down for the full analysis.
Read the original guidance here:
Land Transaction Tax housebuilder relief when you part-exchange a home lived in within 2 years
Land Transaction Tax housebuilder relief when you part-exchange a home lived in within 2 years
If a housebuilder takes your old home as part of selling you a new one, it may not have to pay Land Transaction Tax (LTT), Wales’s version of stamp duty. That can matter to the price and terms the builder offers. Relief is for the builder, not the homeowner.
What this rule is about
Some builders offer a part-exchange style deal. You sell your existing home to the builder and buy a new home from that same builder. Strict conditions apply to the builder’s LTT relief.
Only linked deals meeting residence tests qualify.
That link is the key.
What the official source says
Welsh Government guidance explains that full relief can apply when a housebuilder buys an individual’s old home and sells that person a qualifying new home. Within the meaning of housebuilder, the legislation also includes a connected company or limited liability partnership.
- The builder must buy the old home from one individual, or from individuals buying together.
- That same individual or group must buy the new home from the housebuilder.
- The old home must have been their only or main home at some point in the two years ending when the builder buys it.
- They must intend to live in the new home as their only or main home.
- Each deal must be entered into in return for the other deal.
- The land the builder takes must not exceed the permitted area.
A qualifying new home is not simply any property the builder sells. It must be newly built and not previously lived in, or newly adapted and not lived in since that work.
The permitted area normally includes the house site and up to 0.5 hectares of garden or grounds. Extra land may qualify if reasonably needed. Its size and character matter.
What this means in practice
When the builder buys the old home from the individual or group, sells them a qualifying new home in return, and every residence and land condition is met, full relief applies to the old-home purchase. Once every condition is met, full relief follows. With excess land, the other conditions can still allow partial relief instead.
In that case, tax applies only to a calculated part of the value. To calculate this, the law starts with the market value of the old home and deducts the market value of the permitted garden and grounds area.
- A normal house sale with a qualifying garden may allow full relief.
- A home with fields, paddocks or substantial extra land needs closer checking.
- The builder cannot rely on relief if the old home was never the person’s main home during the stated two-year period.
- A separate sale and purchase will not qualify merely because they happen around the same time.
You might assume that matching completion dates settle the issue. They do not. What matters is whether each deal was agreed in return for the other.
How to analyse it
Start with the arrangement as a whole. Then work through the conditions in order. Missing one condition can prevent full relief, even where the deal looks like a standard part exchange.
- Is the buyer a housebuilder as defined by the legislation, or a company or LLP connected with one?
- Is the builder buying the person’s old home?
- Is the same person, alone or with the same group, buying the builder’s new home?
- Was the old home their only or main home at some point in the two years ending on the builder’s purchase date?
- Do they intend to make the new home their only or main home?
- Do the documents show that each deal was given in return for the other?
- How much land is included, and is any area above 0.5 hectares needed for the home’s reasonable enjoyment?
Keep the evidence that answers those questions. Contracts, the title plan and the valuation may all matter. Evidence of where the person lived and their plans for the new home can matter too.
Example
Amira owns a house with a large garden. The £500,000 offer depends on Amira’s purchase. Amira will buy one of the builder’s unused new homes. Amira lived in her old house last year and plans to move into the new one. Those facts point towards the relief conditions being met.
However, the land includes extra ground. A valuer puts the market value of the permitted house, garden and grounds at £400,000, while the old home interest as a whole is worth £500,000. If the other conditions are met, partial relief means the taxable amount is £100,000. The page does not state the tax rate, so no tax figure can safely be calculated here.
Why this can be difficult in practice
Most disputes will not be about the label on the deal. They will be about the facts behind it. A large plot may be a garden that the home reasonably needs, or it may be separate land with a different use.
Intent can also be hard to prove. A stated plan to live in the new home is relevant, but the surrounding facts should support it.
- Calling a deal a part exchange does not itself create relief.
- Owning the old home is not enough; it must have been the person’s only or main home within the two-year period.
- More than 0.5 hectares does not automatically end relief, but it changes the land question.
- Extra land may lead to partial relief rather than no relief.
- Connected-business status has its own statutory test and should not be assumed from a shared brand name.
Key takeaways
- This relief is for a housebuilder buying an old home in a linked new-home deal.
- The old-home use, intended new-home use and link between both deals all matter.
- Large gardens or extra land can reduce the relief instead of ending it completely.
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
- LTTA 2017 Schedule 14 para 2 — relief when a housebuilder takes an old home
- LTTA 2017 Schedule 14 para 9 — what counts as a housebuilder and connected business; what counts as a new home; how the permitted garden and grounds area works
- LTTA 2017 section 74 — when people and businesses count as connected
Official guidance
The pages below are the Welsh Revenue Authority’s guidance. Guidance is not law. It sets out how the Welsh Revenue Authority 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. the Welsh Revenue Authority can also change or withdraw guidance, and it may not cover your facts.
- Welsh Government technical guidance, LTTA/7045 Relief for acquisition by housebuilder from individual acquiring new dwelling
Where this is not settled
- Whether land above 0.5 hectares is needed for reasonable enjoyment depends on the home’s size and character and on the facts.
- Whether a company or LLP is connected with a housebuilder requires applying the statutory connected-person rules.
- Evidence of a person’s intended main home may be fact-sensitive.
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.
- The contracts and sale documents for both linked deals.
- Evidence that the old home was the person’s only or main home within the relevant two years.
- Evidence supporting the person’s intention to live in the new home as their main home.
- Plans, title documents and valuations showing the land area and market value of the permitted area where land is extensive.
- Evidence that the new home was unoccupied after construction or adaptation.
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 Land Transaction Tax (LTT), the tax on property in Wales. It replaced Stamp Duty Land Tax in Wales on 1 April 2018, and SDLT does not apply in Wales. MY QUESTION Housebuilder relief when you trade in your old home for a new one [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 - LTTA 2017 Schedule 14 para 2 - relief when a housebuilder takes an old home https://www.legislation.gov.uk/anaw/2017/1/schedule/14/paragraph/2 - LTTA 2017 Schedule 14 para 9 - what counts as a housebuilder and connected business https://www.legislation.gov.uk/anaw/2017/1/schedule/14/paragraph/9 - LTTA 2017 Schedule 14 para 9 - what counts as a new home https://www.legislation.gov.uk/anaw/2017/1/schedule/14/paragraph/9 - LTTA 2017 Schedule 14 para 9 - how the permitted garden and grounds area works https://www.legislation.gov.uk/anaw/2017/1/schedule/14/paragraph/9 - LTTA 2017 section 74 - when people and businesses count as connected https://www.legislation.gov.uk/anaw/2017/1/section/74 Guidance page from the Welsh Revenue Authority on this topic (guidance, not law): https://www.gov.wales/land-transaction-tax-relief-certain-acquisitions-dwellings-technical-guidance#5780 HOW I WANT YOU TO ANSWER 1. Work from the legislation above. Read it before answering. Guidance from the Welsh Revenue Authority 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 above 0.5 hectares is needed for reasonable enjoyment depends on the home’s size and character and on the facts. - Whether a company or LLP is connected with a housebuilder requires applying the statutory connected-person rules. - Evidence of a person’s intended main home may be fact-sensitive. Do not give me a conclusion you cannot support from the provisions above.
Legislation links show the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017 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 3 September 2026
Useful article? You may find it helpful to read the original guidance here: Land Transaction Tax housebuilder relief when you part-exchange a home lived in within 2 years
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