Can you get an SDLT refund if a property was uninhabitable when you bought it?

Introduction

Many buyers ask whether they can reclaim Stamp Duty Land Tax (SDLT) if the property they bought was not fit to live in at the effective date of the transaction. This usually arises where a house or flat is in very poor condition and the buyer believes it should not have been treated as a dwelling for SDLT purposes.

The difficulty is that the legal test is strict. A property does not become “not suitable for use as a dwelling” simply because it needs repairs, modernisation, or even substantial renovation. The current case law sets a relatively high threshold, especially following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

The Question

A buyer asked whether they might be able to obtain an SDLT refund after purchasing a residential property which they considered uninhabitable. They indicated that they had photographs and survey material showing the condition of the property and wanted to know whether the facts were strong enough to justify pursuing a claim.

Nick’s Explanation

Nick’s core explanation was that a refund claim of this kind will usually only succeed where the property was in a genuinely derelict or ruinous state at the date of purchase.

In anonymised form, his point was:

“A property will usually only qualify as unsuitable for use as a dwelling if it is in a derelict or ruinous state. Ordinary renovation or repair works are not enough; the property must require some element of reconstruction.”

That is an important summary of how these cases are approached in practice. The issue is not whether the buyer intended to refurbish the property, nor whether it was unpleasant, dated, or unsafe in some respects. The real question is whether, at the effective date of the transaction, the building had ceased to be suitable for use as a dwelling in the ordinary sense.

The Law

The relevant SDLT rules are found in the Finance Act 2003. For SDLT purposes, the tax treatment depends in part on whether the subject matter acquired is residential property. 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 truly not suitable for use as a dwelling at the effective date of the transaction, it may fall outside the residential rules and instead be treated as non-residential or mixed in the right circumstances. That can materially reduce the SDLT charge and may support an amendment or refund claim if too much tax was originally paid.

However, the words “suitable for use as a dwelling” have been considered by the courts and tribunals in a number of cases. The authorities show that the test is objective and is applied at the effective date of the transaction. The condition of the property must be assessed as it stood then, not by reference to later works or the buyer’s plans.

The modern authorities also show that the threshold is high. A property can still be “suitable for use as a dwelling” even if it has serious defects, needs extensive works, lacks modern facilities, or is not lawfully lettable without improvement. 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

When analysing whether an SDLT refund may be available, it helps to work through the issue in stages.

First, identify the exact condition of the property at the effective date of the transaction. Evidence should focus on that date, not on deterioration before exchange or improvements after completion. Useful evidence may include a survey, photographs, contractor reports, mortgage valuation comments, and completion-day correspondence.

Second, ask whether the property was merely in poor condition or whether it had crossed the line into being genuinely unsuitable for use as a dwelling. This is where many claims fail. Problems such as damp, defective electrics, an old kitchen, a worn bathroom, missing floor coverings, heating issues, or a need for rewiring or replastering will often still leave a building within the definition of a dwelling.

Third, consider whether the defects meant that the property required reconstruction rather than repair. That is often a useful practical indicator. If the building still had the basic character of a dwelling and could be occupied, even if only after substantial remedial works, HMRC may argue that it remained suitable for use as a dwelling.

Fourth, check whether the evidence shows a ruinous or derelict state. Examples that may assist a claim can include structural collapse, major fire damage, severe instability, or the absence of essential parts of the building such that it no longer functions as a home in any real sense. Even then, the facts must be carefully examined.

Fifth, apply the current case law cautiously. Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the courts have reinforced that the threshold is relatively high. The fact that a property was not realistically habitable without major works does not automatically mean it was not suitable for use as a dwelling for SDLT purposes.

In short, the legal question is narrower than the everyday meaning of “uninhabitable”. A buyer may honestly describe a property as uninhabitable, but that does not by itself establish the SDLT test.

Outcome

The practical conclusion is that an SDLT refund claim may be possible, but only if the property’s condition at completion was extreme enough to show that it was not suitable for use as a dwelling under the statutory test.

If the property simply needed renovation, updating, or substantial repair, a refund claim is unlikely to succeed. If, however, the evidence shows a truly derelict or ruinous state and some element of reconstruction was needed, there may be a viable argument.

Practical Steps

If you are assessing this issue, the most useful next steps are:

1. Gather evidence showing the condition of the property at the effective date of the transaction, including photographs, surveys, and contractor reports.

2. Prepare a schedule of the defects and distinguish between repair works and reconstruction works.

3. Check the SDLT return that was filed and confirm the filing date, amendment window, and whether a refund claim remains in time.

4. Review the condition against the statutory test of whether the building was suitable for use as a dwelling, not merely whether it was attractive, mortgageable, or immediately occupiable.

5. Consider the impact of the current authorities, especially Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, before assuming that a poor-condition property qualifies.

6. If relying on survey evidence, make sure it addresses the state of the property at completion and explains why the defects go beyond ordinary repair and amount to a loss of dwelling status.

Conclusion

A property does not qualify for an SDLT refund simply because it was in bad condition or needed major renovation. The test is whether it was objectively not suitable for use as a dwelling at the effective date of the transaction. That is now a demanding threshold, and following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, only genuinely derelict or ruinous cases are likely to succeed.

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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