Can you claim Multiple Dwellings Relief for a house with an annexe, holiday cabins and a static caravan in Wales?

Introduction

Buyers of larger residential properties in Wales often ask whether Land Transaction Tax (LTT) can be reduced where the site includes more than one place to live. This commonly happens where a main house is sold with an annexe, holiday lodges, cabins or a caravan.

The key issue is whether those extra units count as separate dwellings for LTT purposes, or whether they are treated as part of the main dwelling or as part of a mixed-use commercial property. Since changes introduced from 7 February 2025, the rules on Multiple Dwellings Relief (MDR) in Wales are narrower, especially where there is a main house with smaller associated accommodation.

The Question

A buyer is purchasing a property in Wales for £727,500. It will be the buyer’s only property. The site includes a main house, an adjoining annexe with separate access, three studio-style log cabins and a two-bedroom static caravan. The property is currently used as a holiday accommodation or glamping site, but the purchase is being funded with a standard residential mortgage and the buyer intends to continue some form of business use after completion.

The question is whether LTT can be reduced by claiming MDR on the basis that several separate units are included in the same transaction, or whether the purchase might instead fall to be taxed as mixed-use property.

Nick’s Explanation

Nick’s view was that the answer depends on what each unit legally and physically is at the effective date of the transaction.

In summary, he explained that Schedule 13 to the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017 allows MDR where two or more dwellings are acquired in a single transaction. However, from 7 February 2025, the rules were changed so that where an individual buys a main dwelling with one or more “subsidiary dwellings”, those subsidiary dwellings are treated as part of a single dwelling rather than counted separately for MDR.

Nick also identified a separate point: if the land is not wholly residential because part of it is genuinely used for a commercial holiday accommodation business, the transaction may be mixed-use. If so, non-residential LTT rates apply to the whole purchase instead of residential rates.

His practical point was that the result turns on matters such as self-containment, permanence, planning status, and whether the cabins and caravan are independent dwellings or simply ancillary or commercial accommodation on the site.

The Law

LTT is charged under section 2 of the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017 on acquisitions of chargeable interests in land.

MDR is contained in Schedule 13 to that Act. Broadly, paragraph 3 applies where a buyer acquires an interest in at least two dwellings in a single transaction or linked transactions. The tax is calculated by:

• dividing the total consideration by the number of dwellings,
• applying the relevant residential rates to that average price, and
• multiplying the result by the number of dwellings.

That can reduce tax where a transaction genuinely includes multiple dwellings.

However, the Land Transaction Tax (Modification of Relief for Acquisitions Involving Multiple Dwellings) (Wales) Regulations 2025 (SI 2025/119 (W.26)) inserted paragraph 7A into Schedule 13. This is important. Where the buyer is an individual and one dwelling is a “qualifying dwelling” with one or more subsidiary dwellings, those subsidiary dwellings are treated as part of the qualifying dwelling rather than as separate dwellings for MDR purposes.

The concept of a subsidiary dwelling is tied to paragraph 14 of Schedule 5. In broad terms, this catches smaller dwellings that are associated with a main dwelling in a way that makes them subsidiary rather than truly separate for this relief.

Separately, if the property is not entirely residential, non-residential or mixed-use treatment may apply. A transaction can be mixed-use if the subject matter includes both residential property and non-residential property. Land used in a genuine commercial enterprise, including some forms of holiday accommodation operation, may in some cases point towards mixed-use treatment.

Where a taxpayer argues that a building was 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 suitability for use, not MDR directly, it underlines that the courts take a fairly demanding approach before treating property as outside normal dwelling treatment on condition grounds.

Analysis

The position should be tested in stages.

First, identify the possible dwellings. On these facts, the possible units are:

• the main house,
• the annexe,
• the three log cabins, and
• the static caravan.

Secondly, ask whether each unit is genuinely a dwelling. That usually means looking at whether it is sufficiently self-contained for day-to-day residential living. Relevant indicators include sleeping space, washing facilities, toilet facilities and cooking facilities. A unit that only offers short-stay accommodation without proper facilities may struggle to qualify as a dwelling.

Thirdly, ask whether any unit is merely subsidiary to the main house. This is especially important for the annexe. If the buyer is an individual and the annexe falls within the new subsidiary dwelling rules, it will not count separately for MDR even if it has its own entrance and is physically usable on its own.

Fourthly, consider the cabins and caravan carefully. Their treatment may depend on:

• whether they are physically fixed or sufficiently permanent,
• whether they have the facilities expected of a dwelling,
• whether planning permission allows residential or holiday occupation,
• whether they are occupied as independent units, and
• whether they are part of a wider commercial holiday business rather than residential accommodation.

Fifthly, stand back and consider whether the property is mixed-use instead. If the site is genuinely being sold as a property that includes land used for a commercial holiday accommodation business, there may be a strong argument that the transaction is not wholly residential. In that event, non-residential LTT rates may apply to the whole transaction. In some cases that produces a lower charge than residential rates, even without MDR.

The fact that the buyer is using a residential mortgage does not by itself settle the tax analysis. LTT depends on the legal nature and use of the property being acquired, not simply the funding method.

Likewise, the fact that the buyer intends to operate the site through a company after completion does not determine the tax position at completion. The relevant question is what is being acquired and what its character is at the effective date of the transaction.

On these facts, the annexe is the most likely unit to be caught by the new subsidiary dwelling rules. The cabins and caravan may or may not count as separate dwellings depending on their facilities, permanence and planning status. If they do not qualify as separate dwellings, or if they are better characterised as part of a commercial holiday site, mixed-use treatment may become the more important route to consider.

Outcome

A buyer in this situation should not assume that MDR is available simply because there are several units on one title. Since 7 February 2025, an annexe or similar associated accommodation may be ignored for MDR if it is a subsidiary dwelling.

The likely outcomes are:

• MDR may be available if there are at least two qualifying dwellings that are not treated as subsidiary dwellings.
• The annexe may well be merged with the main house for MDR purposes under paragraph 7A of Schedule 13.
• The cabins and caravan may count as separate dwellings only if they are genuinely self-contained and sufficiently permanent.
• If the site has a real non-residential commercial character, mixed-use treatment may apply instead, bringing the purchase within non-residential LTT rates.

So the practical conclusion is that either MDR or mixed-use treatment may reduce the tax, but the answer depends on the detailed facts and cannot safely be decided by unit count alone.

Practical Steps

To assess the correct LTT treatment, a buyer should gather clear evidence on the following points before filing the return:

• floorplans showing the layout of the main house, annexe, cabins and caravan,
• details of kitchen, bathroom and sleeping facilities in each unit,
• planning permissions, site licences and any holiday-use restrictions,
• evidence of how the site is currently used and marketed,
• whether the cabins and caravan are fixed or movable and how permanent they are,
• whether any part of the land is used for a trading or commercial purpose, and
• the contract date and effective date, to confirm whether the 7 February 2025 changes apply.

The buyer should then compare two possible calculations:

• residential LTT with MDR, if there are multiple qualifying dwellings after applying the subsidiary dwelling rules, and
• mixed-use or non-residential LTT, if the property includes non-residential land or a genuine commercial element.

Where the facts are borderline, the planning documents and the physical characteristics of each unit will often be critical.

Conclusion

A property with a main house, annexe, holiday cabins and a static caravan does not automatically qualify for MDR in Wales. The post-7 February 2025 rules make it harder to count annexes and similar accommodation separately. The buyer must consider both whether each unit is truly a separate dwelling and whether the site is instead mixed-use. In many cases, the right answer turns on the detailed facts rather than the number of units on the title.

Legal References Used

• Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, section 2
• Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, Part 3
• Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, Schedule 13
• Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, Schedule 13 paragraph 3
• Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, Schedule 13 paragraph 7A
• Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, Schedule 5 paragraph 14
• Land Transaction Tax (Modification of Relief for Acquisitions Involving Multiple Dwellings) (Wales) Regulations 2025 (SI 2025/119 (W.26))
• 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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