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

Introduction

Many buyers ask whether they can recover Stamp Duty Land Tax (SDLT), especially the 3% higher rates charge, where a property had damp, mould, neglect or other serious defects at the time of purchase. This question usually arises where the buyer thinks the dwelling was not fit to live in when bought.

The key issue is whether the property was a “dwelling” for SDLT purposes on the effective date of the transaction. If it was not suitable for use as a dwelling at that date, the residential SDLT rules may not have applied in the usual way. But the legal threshold is now relatively high, particularly after Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

The Question

A buyer purchased a property in England or Northern Ireland within the last four years. At the time of purchase, the property had condition problems such as damp, mould or general disrepair. The buyer also paid the 3% higher rates of SDLT. The question is whether those facts may allow an SDLT reclaim.

Nick’s Explanation

Nick’s explanation can be summarised in this way: a reclaim is sometimes possible where a property was genuinely not suitable for use as a dwelling at the date of purchase, but poor condition on its own is not enough. The condition has to be serious enough that, applying the SDLT rules and case law, the building was not a dwelling at that time.

In anonymised terms, his point is that buyers often focus on visible defects such as damp, mould or neglect, but the legal test is stricter than a general impression that the property was “in a bad state”. The question is whether the property crossed the line from being a defective dwelling into being unsuitable for use as a dwelling for SDLT purposes.

That is especially important now because the courts have confirmed that the threshold is high. A property does not stop being residential simply because it needs works, is unpleasant, or cannot immediately be occupied without inconvenience or expense.

The Law

SDLT on land transactions in England and Northern Ireland is charged under the Finance Act 2003. Whether property is “residential property” matters because residential rates, including the higher rates for additional dwellings in Schedule 4ZA, depend on the subject matter of the transaction.

Broadly, a building counts as residential property 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 on the effective date of the transaction, it may fall outside the residential rules.

The phrase “suitable for use as a dwelling” has been considered in a number of cases. The courts have looked at the actual state of the property at the effective date, not what the buyer intended to do with it later. The test is objective.

Recent authority is especially important. In Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the Court of Appeal confirmed that the condition threshold in “uninhabitable” or “not suitable for use” cases is relatively high. Serious defects do not automatically mean the property was unsuitable for use as a dwelling for SDLT purposes.

Analysis

The issue should be approached in stages.

First, identify the relevant date. For SDLT, the condition of the property is tested at the effective date of the transaction, usually completion. Evidence from before and after that date may help, but the legal question is the condition at that point.

Second, distinguish between disrepair and true unsuitability for use as a dwelling. Many properties are bought in poor condition. Damp, mould, outdated kitchens or bathrooms, defective finishes, neglect, or a need for refurbishment do not by themselves mean the property was not a dwelling. A property can still be a dwelling even if it is uncomfortable, unattractive, or requires extensive works.

Third, consider whether the defects were so serious that the building could not realistically function as a dwelling at all. Examples that may be relevant include the absence of essential services or facilities, major structural failure, or conditions making occupation objectively impossible or unsafe in a fundamental sense. Even then, the court will look closely at the facts.

Fourth, consider the impact on the 3% surcharge. The higher rates in Schedule 4ZA generally apply when a buyer acquires a major interest in an additional dwelling. If the purchased property was not a dwelling at the effective date, that can affect whether the surcharge was due. But this depends on the exact structure of the transaction and the buyer’s wider property position.

Fifth, apply the current case law cautiously. Following Mudan, the threshold is now relatively high. It is not enough to show that the property needed substantial renovation, that mortgage lenders were cautious, or that the buyer did not want to live there immediately. The question is whether the property was objectively unsuitable for use as a dwelling on completion.

That means a simple checklist such as “bought within four years”, “in England or Northern Ireland”, “had damp or mould”, and “paid the 3% surcharge” is only a starting point. Those facts may justify a review, but they do not establish entitlement to a reclaim.

Outcome

A buyer cannot assume that poor condition alone creates an SDLT refund claim. A reclaim may be possible only where the property was genuinely not suitable for use as a dwelling at the effective date of purchase. Because of Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the condition threshold is now relatively high.

So, if the property merely had damp, mould, neglect or needed renovation, that will often be insufficient on its own. The buyer needs evidence of a much more fundamental level of unsuitability.

Practical Steps

If you are assessing whether an SDLT reclaim may be available, the sensible next steps are:

• Check the completion date to see whether any amendment or repayment time limits are still open.
• Obtain the SDLT return and confirm exactly what was filed, including whether the 3% higher rates were charged.
• Gather contemporaneous evidence of the property’s condition at completion, such as survey reports, photographs, contractor reports, lender correspondence and completion documents.
• Focus on objective evidence showing why the property was allegedly not suitable for use as a dwelling at that date.
• Separate cosmetic or refurbishment issues from fundamental defects affecting basic residential use.
• Review the position against the current authorities, especially Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.
• Take professional advice before making a reclaim, because HMRC is likely to scrutinise these claims closely.

Conclusion

A property being in poor condition does not automatically mean SDLT was overpaid. The legal test is whether the building was suitable for use as a dwelling on the effective date of the transaction. After Mudan, that is a demanding test. Buyers should therefore treat any potential reclaim as fact-sensitive and evidence-led, rather than assuming that damp, mould or neglect is enough.

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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