Can you reclaim the 3% SDLT surcharge if a property had damp, mould or neglect when you bought it?

Introduction

Many buyers ask whether they can recover Stamp Duty Land Tax (SDLT), especially the 3% higher rates for additional dwellings, where a property was in poor condition when purchased. This question usually comes up where the dwelling had damp, mould, disrepair or signs of neglect at completion and the buyer later hears that an “uninhabitable” property may fall outside the normal residential SDLT rules.

The key point is that poor condition alone is not enough. The legal test is whether the building was suitable for use as a dwelling at the effective date of the transaction. That is now a relatively demanding test, and the threshold has become clearer following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

The Question

A buyer wants to know whether they may be able to reclaim SDLT paid on the purchase of a property in England or Northern Ireland. The property was bought within the last four years, the buyer paid the 3% higher rates, and the dwelling had condition problems at the time of purchase, such as damp, mould or general neglect.

The issue is whether those defects mean the property was not suitable for use as a dwelling at completion, so that the purchase should not have been taxed as residential property in the usual way.

Nick’s Explanation

Nick’s core point is that a possible reclaim depends on the actual condition of the property at the date of purchase and whether the SDLT treatment used at the time was correct. In anonymised form, his explanation can be summarised like this: the buyer may have a claim worth exploring if the property was acquired in the last four years, was in England or Northern Ireland, had serious condition issues at purchase, and SDLT was paid at the higher residential rates.

That said, the legal question is not simply whether the property needed work. It is whether it was genuinely unsuitable for use as a dwelling at the effective date of the transaction. A property can be unattractive, dated, neglected or in need of repair and still be residential for SDLT purposes.

Nick’s reasoning is therefore best understood as an invitation to investigate the facts carefully, rather than an assumption that damp, mould or neglect automatically create a reclaim.

The Law

SDLT applies to land transactions in England and Northern Ireland under the Finance Act 2003.

For SDLT purposes, a chargeable interest is generally taxed by reference to whether the subject matter is residential property, non-residential property, or mixed property. The higher rates for additional dwellings apply to certain purchases of residential property.

The important statutory concept is whether the property consists of or includes a dwelling. In broad terms, a building may be treated 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.

Where a building is so defective that it is not suitable for use as a dwelling on the effective date of the transaction, the taxpayer may argue that it was not residential property at that point. If that argument succeeds, the higher residential rates may not apply.

However, the courts and tribunals have repeatedly shown that this is a fact-sensitive test. The recent Court of Appeal decision in Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799 confirms that the condition threshold is relatively high. The fact that a property requires repairs, even significant repairs, does not necessarily mean it is unsuitable for use as a dwelling.

Analysis

The analysis usually works in the following order.

First, identify the effective date of the transaction, which is usually completion. The property’s condition must be judged at that date, not before and not after later renovation works.

Second, gather objective evidence of the condition at that time. Useful evidence may include the survey, lender valuation, photographs, contractor reports, environmental reports, correspondence from the conveyancing process, and any evidence showing whether basic services and facilities were present and functioning.

Third, ask what the defects actually meant in practice. Damp, mould, water ingress, broken heating, defective electrics, missing kitchen units, bathroom problems, infestation, structural movement or contamination may all be relevant. But the legal question is whether those matters made the building unsuitable for use as a dwelling, not merely inconvenient, unpleasant or in need of expenditure.

Fourth, consider whether the property still retained the basic character of a dwelling. If it still had the essential nature of a home, even in poor condition, HMRC is likely to argue that it remained residential property.

Fifth, consider the impact of Mudan. Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the threshold for showing that a property was not suitable for use as a dwelling is now relatively high. That means claims based only on damp, mould, dated interiors, cosmetic disrepair or ordinary neglect are much less likely to succeed unless the defects were severe enough to prevent normal residential occupation.

Sixth, check time limits. In many cases, an SDLT amendment or repayment claim must be made within the applicable statutory period. A buyer who completed within the last four years may still be within time to review the position, but the exact route depends on the procedural history of the return.

Finally, distinguish between a weak screening question and the actual legal test. A checklist asking whether there was damp, mould or neglect may be useful as a starting point, but it is not the legal standard. The real issue is suitability for use as a dwelling on completion.

Outcome

A buyer should not assume that paying the 3% surcharge on a run-down property means a refund is available. A reclaim may be possible only where the condition of the property at completion was serious enough that it was not suitable for use as a dwelling under the SDLT rules.

Because of Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the condition threshold is now relatively high. Many properties with damp, mould, neglect or substantial repair needs will still count as dwellings for SDLT purposes.

Practical Steps

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

• Check the completion date to see whether you are still within the relevant SDLT time limits.
• Obtain the SDLT return and confirm exactly what tax was paid, including whether the 3% higher rates were applied.
• Collect contemporaneous evidence of the property’s condition at completion, especially surveys, photos, valuations and repair reports.
• Identify which defects existed on the effective date and whether they affected basic habitability, utilities, sanitation, safety or structural integrity.
• Compare the facts against the current case law, including the high threshold confirmed in Mudan.
• Take specialist SDLT advice before submitting a reclaim, because unsupported claims can be challenged by HMRC.

Conclusion

You may be able to reclaim SDLT on a defective property, including the 3% surcharge, but only if the dwelling was genuinely unsuitable for use as a dwelling at completion. Damp, mould and neglect may be relevant evidence, but they do not by themselves prove the point. After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the bar is relatively high.

Legal References Used

• Finance Act 2003
• 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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