Can you reclaim the 3% SDLT surcharge if a property was in poor condition when you bought it?

Introduction

Many buyers ask whether they can reclaim Stamp Duty Land Tax (SDLT), especially where they paid the 3% higher rates for an additional dwelling and later discover the property was in very poor condition. This issue usually arises where the dwelling had damp, mould, serious neglect or other defects at the date of purchase.

The key legal question is not simply whether the property needed work. It is whether, on the effective date of the transaction, the building was suitable for use as a dwelling for SDLT purposes. That test has become harder to satisfy following recent case law. In particular, the threshold for showing that a property was uninhabitable or not suitable for use as a dwelling is now relatively high after Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

The Question

A common scenario is this: a buyer purchased a property in England or Northern Ireland within the last four years, paid the 3% higher SDLT rates, and the property had serious condition issues at completion, such as damp, mould or general disrepair. The buyer wants to know whether those defects mean the property should not have been treated as a dwelling for SDLT, and whether any SDLT can now be reclaimed.

Nick’s Explanation

Nick’s core point is that buyers often focus on visible defects, but the SDLT test is narrower and more demanding. In anonymised form, his explanation can be summarised like this:

Where a property was bought recently, is in England or Northern Ireland, had significant condition problems at purchase, and the buyer paid the 3% surcharge, it may be worth reviewing the SDLT position. However, a refund is not available just because the property was unattractive, neglected or in need of repair. The real issue is whether it was genuinely unsuitable for use as a dwelling at the relevant date.

That means the facts must be examined carefully. Evidence about the state of the property at completion is critical, and the legal threshold is now stricter than many articles and social media posts suggest.

The Law

SDLT is charged under the Finance Act 2003. Different rates apply depending on whether the subject matter is residential property, non-residential property, or mixed property. The higher rates for additional dwellings are imposed by Schedule 4ZA to the Finance Act 2003.

For these purposes, an important question is whether the property was a “dwelling” on the effective date of the transaction. Broadly, a building counts as a dwelling if it is used or suitable for use as a dwelling, or is in the process of being constructed or adapted for such use.

If a building is not suitable for use as a dwelling at the effective date, that can affect the SDLT analysis. In some cases, taxpayers have argued that a severely defective building should not be treated as residential property at all. If that argument succeeds, the SDLT calculation can change and, depending on the facts, a repayment may be due.

But the courts have repeatedly stressed that “unsuitable for use as a dwelling” is not the same as “in poor condition” or “requiring substantial renovation”. The legal test looks at the actual condition of the property at the effective date and asks whether it still retained the character of a dwelling.

Analysis

The issue should be analysed in stages.

First, identify the transaction date. SDLT is tested at the effective date of the transaction, usually completion. Later works, later surveys and later deterioration do not decide the issue, although they may help show what the condition was at completion.

Second, identify what SDLT treatment was originally applied. If the buyer paid the 3% higher rates, that usually means the property was treated as a residential dwelling and as an additional dwelling under Schedule 4ZA.

Third, look closely at the physical condition of the property at completion. Damp, mould, outdated fittings, missing kitchen units, worn bathrooms, damaged plaster, old electrics, roof issues and general neglect do not automatically make a property unsuitable for use as a dwelling. Many defective properties are still legally dwellings for SDLT purposes.

Fourth, ask whether the defects went so far that the building could not reasonably be used as a dwelling at all. Relevant points may include whether there was basic sanitation, water, electricity, safe access, structural integrity, weatherproofing and the ordinary features needed for residential occupation.

Fifth, apply the current case law carefully. The courts have moved away from an expansive view of “unsuitable for use as a dwelling”. The fact that a property would need major works, or that a buyer would not want to live there immediately, is not enough by itself.

This is where Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799 is especially important. Following that decision, the condition thresholds are now relatively high in uninhabitable or not suitable for use cases. In practical terms, taxpayers now need stronger evidence of truly fundamental defects before they can show that a property was not suitable for use as a dwelling on the effective date.

So, if the property merely had damp, mould or neglect, a reclaim may be difficult unless those problems were part of a wider picture showing that the building had ceased to be suitable for residential use. By contrast, if the property lacked the essential characteristics of a dwelling at completion, the argument may still be worth exploring.

Finally, timing matters. SDLT amendment and repayment claims are subject to statutory time limits. Anyone considering a reclaim should check promptly whether they are still within time and what procedural route is available.

Outcome

The practical conclusion is that a buyer cannot assume that poor condition alone creates an SDLT refund. A reclaim may be possible, but only where the facts support the stronger legal argument that the property was not suitable for use as a dwelling at the effective date.

After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, that is a relatively high bar. Many properties with damp, mould, neglect or substantial disrepair will still be treated as dwellings for SDLT purposes.

Practical Steps

If you want to assess your position, take these steps:

• Find the SDLT return and completion statement to confirm what was filed and what rates were paid.
• Check the completion date, because the legal test applies at that date and time limits may be important.
• Gather evidence of the property’s condition at completion, such as surveys, photographs, contractor reports, mortgage valuation comments, retention letters and correspondence from the conveyancing stage.
• Separate cosmetic or repair issues from fundamental defects affecting suitability for use as a dwelling.
• Review the position against the current authorities, especially Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.
• Check whether the claim is really about dwelling suitability, or whether another SDLT issue may be more relevant.
• If a reclaim is still arguable, make sure the correct procedural route is used within the relevant statutory deadline.

Conclusion

A property being in bad condition does not automatically mean SDLT was overpaid. The real question is whether it was suitable for use as a dwelling on completion. That test is now applied strictly, and the threshold in uninhabitable cases is relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. Any potential reclaim should therefore be based on detailed evidence and a careful legal analysis, not on the fact that the property needed work.

Legal References Used

• Finance Act 2003
• Finance Act 2003, Schedule 4ZA
• 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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