Can you make SDLT refund claims on historic property flips?

Introduction

Property investors often ask whether Stamp Duty Land Tax (SDLT) can be reclaimed on earlier purchases, especially where a property was bought to refurbish, flip or resell. A common line of enquiry is whether the dwelling was unsuitable for use as a residence at the effective date of the transaction, because that can affect whether the residential SDLT rules applied.

This article explains the issue in general terms, using an anonymised version of a query about historic property purchases and possible SDLT claims. It also explains why these cases now need careful analysis, particularly after the Court of Appeal decision in Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, which confirms that the threshold for showing a property was not suitable for use as a dwelling is relatively high.

The Question

A property investor was introduced to Nick to discuss whether SDLT claims might be available on a number of earlier purchases in the North East. The properties had been bought as part of a flipping strategy, and there was interest in exploring whether any historic transactions had been taxed on the wrong basis.

The broad question was: can an investor revisit older purchases and claim an SDLT refund, particularly where the properties needed substantial works or were said to be uninhabitable when bought?

Nick’s Explanation

Nick’s response, in substance, was that it is worth reviewing the facts of each purchase carefully, but claims should only be pursued where the legal conditions are genuinely met. In anonymised form, his point was that historic transactions can sometimes justify a refund claim, but only after a detailed review of the property condition, the transaction documents and the SDLT treatment originally used.

The key point in Nick’s reasoning is that not every run-down property qualifies. A property can be in poor repair, require refurbishment, or even be unattractive to occupy, and still count as a dwelling for SDLT purposes. The question is not whether the buyer intended to renovate it, but whether, at the effective date of the transaction, it was suitable for use as a dwelling under the legislation and case law.

That distinction matters because many refund enquiries are based on the assumption that serious disrepair automatically takes a property outside the residential SDLT rules. That is not correct. The legal test is stricter than many buyers expect.

The Law

SDLT is charged under the Finance Act 2003. For most property purchases, the starting point is whether the subject matter acquired is residential property, non-residential property, or mixed-use property.

The core statutory definition is found in section 116 Finance Act 2003. Broadly, residential property includes:

• a building that is used or suitable for use as a dwelling, or is in the process of being constructed or adapted for such use;
• land that forms part of the garden or grounds of such a building; and
• interests or rights over land that subsist for the benefit of such a building or land.

A transaction involving residential property is generally taxed under the residential SDLT rate structure. If the property was not suitable for use as a dwelling at the effective date, that may affect whether it falls within the residential rules.

HMRC’s published guidance has long addressed the “suitable for use as a dwelling” test, but the courts have made clear that the issue is highly fact-sensitive. The leading recent authority is Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

Following Mudan, the condition threshold in uninhabitable or unsuitable-for-use cases is now relatively high. A property will not fall outside the dwelling definition merely because it is dilapidated, lacks modern fittings, needs extensive repair, or would not immediately appeal to an ordinary owner-occupier. The question is whether the property had, at the relevant date, enough of the physical characteristics of a dwelling to be suitable for residential use in law.

Analysis

When reviewing an historic SDLT transaction, the analysis usually proceeds in the following stages.

First, identify exactly what was bought. Was it a single house or flat, land with buildings, a mixed-use site, or a property with commercial elements? Some claims fail because the basic description of the transaction has not been checked properly.

Second, establish the effective date of the transaction for SDLT purposes. The property condition must be assessed at that date, not by reference to later works or later photographs.

Third, gather objective evidence of the property’s condition at completion. This may include:

• auction particulars;
• valuer or surveyor reports;
• mortgage valuation material;
• legal pack documents;
• completion statements and contract papers;
• photographs clearly dating from the relevant time;
• builder reports or invoices close to completion; and
• evidence of utility disconnection, structural failure, or missing essential features.

Fourth, ask whether the defects truly meant the property was not suitable for use as a dwelling. This is where many claims become difficult. Problems such as damp, outdated kitchens or bathrooms, damaged plaster, old wiring, heating issues, infestation, broken windows, or a need for major refurbishment do not necessarily mean the property was unsuitable in law.

Fifth, distinguish between a property that is inconvenient or undesirable to live in and one that is legally outside the dwelling definition. After Mudan, the courts have reinforced that the test is not whether the property was comfortable, mortgageable, or fit for immediate modern occupation in an everyday sense. The threshold is higher.

Sixth, consider whether there is any separate SDLT issue apart from habitability. For example, some historic reviews involve mixed-use arguments, multiple dwellings issues on older transactions, linked transactions, or questions about whether the 3% higher rates were correctly applied. A claim should not be framed solely around disrepair if a different legal analysis is the real point.

In practical terms, an investor looking at historic flips should be careful not to assume that buying a “wreck” automatically created a refund opportunity. A derelict appearance is not enough by itself. The facts must show that, at the effective date, the building was not suitable for use as a dwelling within section 116 Finance Act 2003 as interpreted by the courts.

Outcome

The practical conclusion is that some historic SDLT purchases may justify review, but refund claims based on a property being uninhabitable or unsuitable for use as a dwelling are now harder to sustain unless the evidence is strong.

Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the condition threshold is relatively high. A property in poor condition will often still be treated as residential property for SDLT purposes. A viable claim usually requires more than proof that substantial refurbishment was needed.

Practical Steps

If you want to assess whether an historic purchase may support an SDLT claim, the sensible steps are:

1. Make a list of the transactions you want reviewed, with completion dates and purchase prices.
2. Obtain the SDLT returns and any filing calculations used at the time.
3. Collect contemporaneous evidence of the property condition at completion.
4. Check whether the issue is really one of suitability for use as a dwelling, or whether another SDLT point may be stronger.
5. Review the transaction against section 116 Finance Act 2003 and the current case law, especially Mudan.
6. Consider time limits carefully, including whether any amendment window or overpayment relief route may still be open.
7. Only submit a claim where the factual record and legal analysis support it properly.

Because SDLT claims are evidence-heavy and HMRC will usually test unsupported assertions closely, a document-led review is essential.

Conclusion

Historic property flips can sometimes justify SDLT review, but not every run-down purchase leads to a refund. The central legal question is whether the property was suitable for use as a dwelling at the effective date. After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, proving that a property fell outside the dwelling definition requires strong facts and careful legal analysis.

Legal References Used

• Finance Act 2003
• Finance Act 2003, section 116
• 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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