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 recover Stamp Duty Land Tax (SDLT), especially the 3% higher rates charge, where a property was in very poor condition at the time of purchase. This question usually comes up where the dwelling had serious damp, mould, neglect or other defects and the buyer believes it was not fit to live in on completion.

The issue matters because SDLT on residential property can be much higher than SDLT on non-residential property. If a building was genuinely not suitable for use as a dwelling at the effective date of the transaction, the tax treatment may be different. But the legal threshold is now relatively demanding, particularly after the Court of Appeal decision in Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

The Question

A buyer wants to know whether they may be entitled to an SDLT reclaim. The general scenario is this:

• the property was bought within the last four years;
• the property is in England or Northern Ireland;
• the building had serious condition problems when purchased, such as damp, mould or neglect; and
• the buyer paid the 3% higher rates of SDLT.

The practical question is whether those facts could support an SDLT refund claim on the basis that the property was not suitable for use as a dwelling at the time of purchase.

Nick’s Explanation

Nick’s explanation can be summarised in this way: poor condition on its own is not enough. The key legal question is whether the property was suitable for use as a dwelling on the effective date of the transaction. If it was still capable of being used as a home, even if it needed substantial repair or modernisation, residential SDLT rates usually still apply.

In anonymised form, his point is that buyers sometimes assume that damp, mould, disrepair or neglect automatically means a property is “uninhabitable” for SDLT purposes. That is too broad. The legal test is narrower, and recent case law shows that the condition threshold is now relatively high.

He also highlights the practical importance of timing. A claim generally needs to be made within the statutory amendment window, which is commonly four years from the effective date of the transaction, subject to the particular route by which the claim is made.

The Law

SDLT is charged under the Finance Act 2003. Whether residential or non-residential rates apply depends on the nature of the subject matter at the effective date of the transaction.

The main statutory framework includes:

• Finance Act 2003, section 42;
• Finance Act 2003, section 55;
• Finance Act 2003, Schedule 4ZA, which deals with higher rates for additional dwellings; and
• the statutory concept of a “dwelling” in Finance Act 2003, including the rule that a building counts as a dwelling if it is used or suitable for use as a single dwelling, or is in the process of being constructed or adapted for such use.

For many SDLT disputes of this kind, the central issue is whether the building was “suitable for use” as a dwelling at completion. If it was, residential rates apply, and if the buyer owned another dwelling and the other conditions were met, the 3% surcharge under Schedule 4ZA may also apply.

If the building was not suitable for use as a dwelling at that date, it may instead fall to be treated as non-residential property for SDLT purposes. That can significantly reduce the tax and may support a refund claim if too much SDLT was originally paid.

Case law has developed this test. The courts have repeatedly said that the question is an objective one, looking at the property’s actual condition at the effective date of the transaction. The recent Court of Appeal decision in Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799 is especially important because it confirms that the threshold for showing unsuitability is relatively high. A property does not become non-residential merely because it is unpleasant, neglected, defective or in need of substantial works.

Analysis

The analysis usually works in five steps.

First, identify the relevant date. For SDLT, the condition of the property is assessed at the effective date of the transaction, usually completion. Later works, later deterioration or later improvement do not determine the original SDLT position.

Second, examine the actual physical state of the building at that date. Relevant evidence may include survey reports, photographs, contractor reports, mortgage valuation comments, environmental reports, utility condition, and completion documents. The question is not whether the property was attractive, mortgageable on standard terms, or compliant with every modern standard. The question is whether it was suitable for use as a dwelling.

Third, distinguish between serious disrepair and true unsuitability for use as a dwelling. Problems such as damp, mould, dated interiors, broken kitchens, damaged plaster, old wiring, missing floor coverings, and general neglect may still leave a property suitable for occupation. Even substantial repair needs do not necessarily cross the threshold.

Fourth, ask whether there was some fundamental defect preventing residential use. Examples that may be relevant include the absence of basic facilities, major structural danger, conditions making occupation unsafe, or damage so extensive that the building could not realistically be lived in as a home at completion. Even then, each case is fact-sensitive.

Fifth, consider the effect on the SDLT return. If the property was still suitable for use as a dwelling, residential rates applied and any higher rates charge may well have been correctly paid. If it was not suitable for use as a dwelling, there may be scope to amend the SDLT position and seek a repayment.

Following Mudan, readers should be cautious about assuming that “uninhabitable” is easy to prove. The courts now make clear that the threshold is relatively high. A property can be in poor condition and still remain a dwelling for SDLT purposes. In practice, many claims based only on damp, mould or neglect will fail unless the evidence shows something more serious that truly prevented use as a home at the relevant date.

Outcome

The practical conclusion is that a buyer may be able to reclaim SDLT, including the 3% surcharge, only if the property was not suitable for use as a dwelling at the effective date of the purchase and the claim is still made in time.

Buying within the last four years, owning another property, and finding damp or neglect are not enough by themselves. The real issue is whether the property crossed the legal line from “poor condition” into “not suitable for use as a dwelling”. After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, that line is harder to cross than many buyers expect.

Practical Steps

If you want to assess whether an SDLT reclaim may be possible, the sensible next steps are:

• check the completion date to see whether the claim is still within time;
• obtain the SDLT return and confirm what rates were paid, including whether the 3% higher rates surcharge was charged;
• gather contemporaneous evidence of the property’s condition at completion, especially survey reports, photographs, invoices, contractor opinions and lender comments;
• focus on evidence showing why the building could not be used as a dwelling at that date, not just why it needed repair;
• compare the facts carefully with the current case law, including the stricter approach confirmed in Mudan; and
• review whether the original SDLT treatment can realistically be challenged on the evidence.

Where the evidence shows only disrepair, modernisation needs or unpleasant living conditions, a reclaim is much less likely to succeed. Where the evidence shows a fundamental inability to occupy the building as a home at completion, there may be a stronger basis for review.

Conclusion

A property in poor condition does not automatically qualify for an SDLT refund. The legal test is whether it was suitable for use as a dwelling at the effective date of the transaction. Because the threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, any reclaim needs to be based on strong contemporaneous evidence showing genuine unsuitability for residential use.

Legal References Used

• Finance Act 2003
• Finance Act 2003, section 42
• Finance Act 2003, section 55
• 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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