Can a survey help prove a property was not suitable for use for SDLT?

Introduction

People often ask whether a building survey can support a Stamp Duty Land Tax refund claim on the basis that a property was not suitable for use as a dwelling at the date of purchase. This issue matters because the SDLT treatment of a property depends on whether it was residential at the effective date of the transaction. A survey may help, but it is not enough simply to show that repairs were needed or that the property was in poor condition.

The Question

A buyer obtained a survey after purchasing a property and wanted to know whether that survey could support an SDLT reclaim. The underlying issue was whether the property was in such a poor state at completion that it should not have been treated as residential property for SDLT purposes.

Nick’s Explanation

Nick’s response, in substance, was that obtaining the survey was a useful step because the condition of the property must be evidenced properly if a reclaim is to be considered. However, the key point is not whether the property needed work, but whether it was genuinely not suitable for use as a dwelling at the effective date of purchase.

In anonymised form, his explanation can be summarised like this: a survey can help show the factual condition of the property, but HMRC and the courts look closely at whether the defects were serious enough to stop the property being used as a home. Evidence is strongest where it identifies major failures affecting basic habitation, rather than ordinary disrepair, dated condition, or renovation needs.

The Law

The starting point is the SDLT legislation in Part 4 of the Finance Act 2003. Whether higher residential rates, standard residential rates, or non-residential/mixed treatment apply depends on the nature of the property at the effective date of the transaction.

For these purposes, the question is whether the property was “residential property”. Broadly, a building used or suitable for use as a dwelling will usually be treated as residential. If a property is so defective that it is not suitable for use as a dwelling at completion, that may affect its SDLT classification.

HMRC has published guidance on this issue in its SDLT Manual, including SDLTM00385, which discusses when a building is suitable for use as a dwelling.

The courts have also considered the meaning of suitability for use as a dwelling. The current position is stricter than many buyers expect. In an uninhabitable or not suitable for use case, the condition threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

Analysis

The analysis usually works in four stages.

First, identify the condition of the property at the effective date of the transaction, usually completion. The legal test is applied to the property as it stood then, not after later strip-out works or refurbishment decisions.

Second, consider the nature of the defects. A property does not become non-residential simply because it is old, neglected, damp, in need of modernisation, or expensive to repair. Many properties are bought in poor condition but are still suitable for use as dwellings.

Third, ask whether the defects affected the basic ability to live in the property as a dwelling. Relevant matters may include the absence or failure of essential services, serious structural instability, or conditions making occupation unsafe or practically impossible. Even then, the threshold is demanding.

Fourth, assess the evidence. A survey can be important, but its value depends on what it actually says. The most helpful reports are those that clearly describe the condition at the purchase date, explain the practical effect of the defects, and support the conclusion with objective findings. Photographs, contractor reports, invoices, mortgage valuation material, insurance documents, and contemporaneous correspondence may also be relevant.

Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the courts have reinforced that the test is not met by showing substantial disrepair alone. The issue is whether the property crossed the relatively high threshold of being not suitable for use as a dwelling at the relevant date.

That means a buyer should be cautious about assuming that a survey mentioning damp, defective kitchens or bathrooms, outdated electrics, missing finishes, or a recommendation for major works will automatically support a reclaim. Those matters may show a poor-quality dwelling, but not necessarily a property that falls outside residential treatment for SDLT.

Outcome

A survey may support an SDLT reclaim, but only if it provides strong evidence that the property was not suitable for use as a dwelling at completion. In practice, many surveys show serious disrepair without meeting that legal threshold. The post-Mudan position means the bar is relatively high.

Practical Steps

If you are assessing this issue, take these steps:

• Obtain the full survey, not just a summary.
• Check what the report says about the property’s condition on the completion date.
• Identify whether the defects affected essential habitability rather than comfort, appearance, or modernisation.
• Gather supporting evidence such as dated photographs, repair estimates, invoices, and any contemporaneous correspondence.
• Compare the facts against HMRC guidance and the case law, especially Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.
• Review the SDLT return that was filed and the basis on which the property was treated as residential or otherwise.

Conclusion

A survey is useful evidence, but it is only part of the picture. For SDLT, the real question is whether the property was genuinely not suitable for use as a dwelling at the effective date of the transaction. After Mudan, that is a relatively demanding test, and ordinary disrepair or renovation needs will usually not be enough.

Legal References Used

• Finance Act 2003, Part 4
• HMRC SDLT Manual, SDLTM00385
• 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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