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

Introduction

Many buyers ask whether they can recover Stamp Duty Land Tax (SDLT), especially the 3% higher rates surcharge, where a property was in very poor condition when purchased. This usually comes up where the dwelling had damp, mould, neglect or other defects and the buyer believes it may not have been suitable for use as a home at the effective date of the transaction.

The issue matters because SDLT on residential property can be higher than SDLT on non-residential or mixed property, and the 3% higher rates surcharge can increase the tax significantly. However, the legal test for saying a property was not suitable for use as a dwelling is now demanding, and recent case law has raised the threshold further.

The Question

A buyer wants to know whether they may be entitled to an SDLT reclaim where:

• the purchase took place within the last four years;
• the property was in England or Northern Ireland;
• the property had condition problems at the time of purchase, such as damp, mould or general neglect; and
• the buyer paid the 3% higher rates of SDLT.

The practical question is whether those facts could support an amended SDLT position and a refund claim.

Nick’s Explanation

Nick’s explanation can be summarised in this way: poor condition on its own does not usually mean a building stops being a dwelling for SDLT purposes. The key question is whether, at the effective date of the transaction, the property was genuinely not suitable for use as a dwelling.

In anonymised terms, his point is that buyers often focus on defects such as damp, mould and neglect, but the legal test is stricter than that. A refund is only likely to be available where the property’s condition was so serious that it crossed the line from “in poor condition” to “not suitable for use as a dwelling” at the relevant date.

That distinction is critical. A property may be unpleasant, run down, expensive to repair or even unmortgageable, yet still count as a dwelling for SDLT. The fact that works were needed after completion does not by itself create a reclaim.

The Law

SDLT is charged under the Finance Act 2003. Whether property is taxed as residential property depends on the statutory definition in Schedule 4ZA and related provisions.

For these purposes, a building is generally 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. The question of “suitable for use as a dwelling” is judged at the effective date of the transaction, usually completion.

If the property is residential and the buyer owns, or is treated as owning, another dwelling, the higher rates in Schedule 4ZA may apply, including the 3% surcharge.

Where a taxpayer says the property was not suitable for use as a dwelling, the argument is usually that the property should not have been treated as residential property at all. If that argument succeeds, it can affect the SDLT calculation and may remove the basis on which the higher rates were charged.

The courts have repeatedly said that this is an objective test. It is not enough that the buyer intended to renovate, that lenders would not lend, or that the property was unattractive or defective. The building’s actual physical condition at completion is what matters.

In an uninhabitable or not suitable for use case, the condition thresholds are now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

Analysis

The analysis usually works in five steps.

1. Identify the relevant date

   The condition of the property must be assessed at the effective date of the transaction, usually the completion date. Later deterioration, later surveys or repair decisions may help as evidence, but they do not change the legal test.

2. Decide whether the property was still suitable for use as a dwelling

   This is the central question. Damp, mould, missing fittings, outdated services, leaks, poor decorative condition and general neglect do not automatically mean the building was unsuitable for use. The issue is whether the defects were so serious that the property could not realistically function as a dwelling at that time.

3. Separate serious disrepair from true unsuitability

   Many claims fail because the evidence shows a property in bad condition rather than a property that had ceased to be a dwelling. Courts and tribunals have been reluctant to accept that ordinary renovation cases fall outside the residential SDLT rules.

4. Consider the effect on the 3% surcharge

   If the property remained residential, the higher rates analysis generally stays in place. If, exceptionally, the property was not suitable for use as a dwelling, the SDLT treatment may change and a reclaim may be possible.

5. Check the time limit for amendment or repayment

   In practice, timing is important. Buyers often refer to a four-year period because SDLT repayment routes are time-sensitive. The exact route depends on the procedural basis for the claim and whether the return can still be amended or whether a repayment claim must be made.

The recent appellate position makes these claims harder than some promotional material suggests. After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the threshold for saying a property was not suitable for use as a dwelling is relatively high. The fact that a property had damp, mould or neglect will not be enough unless the overall condition was severe enough to take it outside the concept of a dwelling altogether.

That means a buyer should be cautious about assuming that any hazardous or poor condition creates a reclaim. The legal question is narrower and more demanding.

Outcome

A buyer may have grounds to explore an SDLT reclaim if the property’s condition at completion was exceptionally serious and meant it was not suitable for use as a dwelling. But most properties with damp, mould, disrepair or neglect will still be treated as dwellings for SDLT.

So, paying the 3% higher rates surcharge does not by itself mean a refund is available. The real issue is whether the building crossed the high threshold for unsuitability at the effective date of the purchase.

Practical Steps

If you want to assess your position, the sensible next steps are:

• check the completion date and whether you are still within the relevant SDLT time limits;
• gather evidence of the property’s condition at completion, including surveys, photographs, contractor reports, mortgage valuation comments and correspondence from the transaction;
• focus on evidence showing the property could not function as a dwelling, not merely that it needed repair;
• review the SDLT return filed on completion and identify exactly why the higher rates were charged;
• compare the facts carefully against the current case law, especially the stricter approach confirmed by Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799; and
• take advice on whether the facts support an amendment or repayment claim before submitting anything to HMRC.

Conclusion

You cannot assume that damp, mould or general disrepair will justify an SDLT reclaim. For SDLT, the question is whether the property was objectively not suitable for use as a dwelling at completion, and that is now a relatively high threshold. A reclaim is possible in some cases, but only where the evidence is strong and the defects were truly severe.

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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