Do overseas properties count for Scotland ADS when buying a home?

Introduction

People buying a home in Scotland often ask whether property they already own abroad could trigger the Additional Dwelling Supplement (ADS). This is a common concern where one buyer owns an overseas flat, land or investment property, while the other buyer owns nothing.

The answer depends on the ADS rules in Schedule 2A of the Land and Buildings Transaction Tax (Scotland) Act 2013. In particular, Revenue Scotland looks at whether any buyer already owns another dwelling anywhere in the world, whether that interest is worth at least £40,000, and whether the property is residential in nature.

In the scenario discussed here, the issue was whether a low-value overseas flat and an undeveloped overseas plot of land would cause ADS to apply to a joint purchase of a Scottish home.

The Question

A married couple plan to buy a home in Scotland jointly for £338,001. They currently rent in Scotland. One spouse is a first-time buyer and owns no property anywhere in the world. The other spouse owns two assets overseas:

• a residential flat worth about £35,000; and
• an undeveloped non-residential plot of land with nothing built on it and no plans for development.

They want to know whether either of those overseas interests would trigger ADS on the Scottish purchase, or whether only the normal residential LBTT rates would apply.

Nick’s Explanation

Nick’s view was that the couple were broadly right in their own reading of the rules.

He explained that ADS is charged under Schedule 2A where, at the effective date of the purchase, a buyer owns another dwelling anywhere in the world, that interest is worth £40,000 or more, and the property is residential.

In anonymised form, his key points were:

• the overseas flat is residential, so it is potentially relevant;
• however, if it is genuinely worth less than £40,000, it does not count for ADS purposes;
• the undeveloped plot is not a dwelling, so it is not relevant to ADS; and
• on those facts, ADS should not apply, although normal LBTT on the Scottish purchase still would.

That is a sensible summary of how the legislation works in a straightforward case.

The Law

LBTT is the Scottish transaction tax charged on land transactions in Scotland. ADS is an extra charge that can apply when a buyer acquires an additional dwelling.

The key source is Schedule 2A to the Land and Buildings Transaction Tax (Scotland) Act 2013.

In broad terms, ADS can apply if, at the end of the day of the transaction:

• the buyer is acquiring a major interest in a dwelling in Scotland;
• the chargeable consideration is £40,000 or more;
• the buyer owns an interest in another dwelling;
• that other interest has a value of £40,000 or more; and
• the other dwelling is not ignored under a specific relieving rule.

For joint purchases, the rules are strict. If any one of the buyers meets the conditions for owning another relevant dwelling, that can be enough for ADS to apply to the whole transaction, unless an exception applies.

Another important point is that overseas property can count. The legislation is not limited to UK property. So a dwelling outside the UK may be relevant if it satisfies the statutory tests.

By contrast, non-residential land is not a dwelling. Bare land, agricultural land, commercial land or undeveloped plots will not usually count unless what is being acquired is, in substance, a dwelling or land that forms part of the garden or grounds of a dwelling.

Where buyers argue that a building is uninhabitable or not suitable for use as a dwelling, the threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. Although that case concerns the SDLT regime in England, it is a useful warning that “not suitable for use” arguments are now approached narrowly and require serious disrepair or defect. That point is less central here because the overseas land is said to be undeveloped rather than an uninhabitable building.

Analysis

The easiest way to analyse this kind of case is to test each overseas asset separately.

First, the overseas residential flat.

A flat is plainly capable of being a dwelling. So the first question is not whether it is residential, but whether the buyer’s interest in it is worth at least £40,000 at the relevant date. If the market value is only about £35,000, it falls below the statutory threshold. On that basis, it should not count as a relevant dwelling for ADS purposes.

That said, the value needs to be realistic and supportable. If the figure is uncertain, outdated or based on an unreliable estimate, there is risk. A formal or credible valuation is therefore important where the position depends on being below the £40,000 threshold.

Second, the undeveloped overseas plot.

If the land is genuinely undeveloped, non-residential, has no building on it and no dwelling rights attaching to an existing residence, it is not a dwelling. ADS is concerned with dwellings, not with land in general. So even if the land is worth more than £40,000, that does not by itself matter if the asset is not residential property for ADS purposes.

Third, the joint purchase point.

Because the purchase is in joint names, the fact that one spouse owns no property does not automatically prevent ADS. If the other spouse owned a relevant dwelling worth £40,000 or more, ADS could still apply to the whole Scottish purchase. But on the facts given here, neither overseas asset appears to meet the statutory test:

• the flat is residential but below £40,000; and
• the land may be above £40,000, but it is not a dwelling.

Fourth, the purchase of the Scottish home itself.

The Scottish purchase price of £338,001 is well above the general LBTT threshold, so ordinary residential LBTT would still be payable under the standard rates. The question here is only whether the extra ADS charge is added on top. On the stated facts, it should not be.

Outcome

On the facts described, the practical conclusion is that ADS should not apply.

The likely position is:

• the low-value overseas flat does not count because it is worth less than £40,000; and
• the undeveloped overseas plot does not count because it is not a dwelling.

The buyers should therefore expect the Scottish purchase to be taxed at the normal residential LBTT rates only, assuming the facts and values are correct at the effective date of the transaction.

Practical Steps

If you are in a similar position, the safest approach is to work through the following points before completion:

• identify every property interest owned by each buyer anywhere in the world;
• separate residential property from non-residential property;
• check whether any dwelling interest is worth £40,000 or more at the effective date;
• keep evidence of market value, especially if you rely on a property being below £40,000;
• confirm whether any land is truly undeveloped and non-residential;
• make sure your solicitor has full details of all worldwide property interests before the LBTT return is filed; and
• if there is any doubt about classification or valuation, obtain specific tax advice before settlement.

Where an overseas asset is close to the £40,000 threshold, or where there is uncertainty about whether land includes residential rights or a dwelling element, the position should be checked carefully.

Conclusion

Owning property abroad does not automatically trigger Scotland’s ADS. The key questions are whether the overseas asset is a dwelling and whether the buyer’s interest in it is worth at least £40,000. In the scenario considered here, a residential flat worth about £35,000 and an undeveloped non-residential plot should not trigger ADS, so only standard residential LBTT should apply to the Scottish purchase.

Legal References Used

• Land and Buildings Transaction Tax (Scotland) Act 2013, Schedule 2A
• Revenue Scotland guidance on Additional Dwelling Supplement
• Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799

This page was last updated on 22 March 2026.

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