Can a derelict property with structural damage and asbestos be treated as non-residential for SDLT?

Introduction

Buyers often ask whether a badly damaged house can be taxed as non-residential property for Stamp Duty Land Tax (SDLT). This question usually comes up where the building has serious structural defects, contamination issues such as asbestos, or appears beyond economic repair.

The key point is that SDLT looks at the condition of the property on the effective date of the transaction. The legal test is not whether the building was once a house, or whether it could one day become habitable after major works. The question is whether it was actually “used or suitable for use as a dwelling” at the relevant date.

That said, the threshold for showing that a building was not suitable for use as a dwelling is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

The Question

A buyer was considering the SDLT treatment of a residential-looking property that was said to be in very poor condition. The reported problems included widespread structural cracking, vegetation growth affecting the building, and asbestos-containing materials identified in a survey. The buyer believed that demolition and rebuilding might be the only realistic option and wanted to know whether that could support non-residential SDLT treatment.

Nick’s Explanation

Nick’s explanation was that the issue turns on section 116 Finance Act 2003 and the meaning of “suitable for use as a dwelling”. He noted that where a building is in a ruinous condition with serious structural issues, and hazardous materials must be removed before any safe occupation is possible, there may be an argument that the property has lost its character as a dwelling.

In anonymised form, his reasoning was that:

• the building appeared to suffer from significant structural degradation;
• the survey identified asbestos-containing materials in several parts of the building, requiring specialist removal before works or occupation;
• if full demolition and reconstruction are the only realistic course, that may support the view that the building is no longer suitable for use as a dwelling.

Nick also pointed out that SDLT is self-assessed. In practice, that means the taxpayer must decide how the property should be classified on the SDLT return, based on the facts and the law as they stood at the transaction date.

The Law

The main provision is section 116 Finance Act 2003. Broadly, property is “residential property” for SDLT purposes if it consists of or includes:

• a building that is used or suitable for use as a dwelling, or is in the process of being constructed or adapted for such use;
• land that forms part of the garden or grounds of such a building; or
• an interest or right over land that subsists for the benefit of such a building or land.

If property is not residential property, it may fall to be treated as non-residential or mixed property, depending on the facts.

The important phrase is “suitable for use as a dwelling”. That wording has been considered in a number of cases, and the Court of Appeal has now given important guidance in Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

The effect of Mudan is that the legal threshold is demanding. The court confirmed that the test focuses on the property’s actual ability to be lived in at the effective date of the transaction. A building does not cease to be residential simply because it is dated, damaged, or in need of extensive repair. Nor is it enough that substantial works would be required before comfortable occupation. The question is whether the building has truly ceased to be suitable for use as a dwelling at that time.

Analysis

When applying the rules, it helps to work through the issue step by step.

First, ask what was physically present on the effective date of the transaction. If there was still a building that retained the character of a house, that points towards residential treatment unless the condition was so severe that it could not realistically be lived in as a dwelling.

Second, consider the nature of the defects. Structural cracking, roof failure, severe water ingress, dangerous instability, and similar problems may all be relevant. But poor condition on its own is not enough. Many properties needing major renovation are still treated as residential for SDLT.

Third, consider whether any health and safety issue made occupation impossible rather than merely unattractive. The presence of asbestos can be relevant, but asbestos does not automatically mean a property is unsuitable for use as a dwelling. Much depends on the type, location, condition, and risk presented by the asbestos-containing materials, and whether the building could safely be occupied pending remediation.

Fourth, ask whether the building could realistically be repaired, or whether demolition was effectively unavoidable. If the evidence shows that the only viable route was full demolition because the structure had failed to such an extent that it no longer functioned as a dwelling, that is more helpful to a non-residential argument.

Fifth, keep in mind the high threshold after Mudan. Even where a property is in serious disrepair, the courts may still regard it as residential if it has not lost its essential character as a dwelling. The fact that a buyer intends to demolish it, or that refurbishment would be uneconomic, is not by itself decisive. SDLT classification depends on the state of the property at completion, not the buyer’s plans.

On facts like these, the strongest points in favour of non-residential treatment would be evidence showing all of the following:

• serious structural failure rather than ordinary disrepair;
• conditions making occupation unsafe in a real and immediate sense;
• hazardous materials requiring specialist removal before any safe use;
• evidence that refurbishment was not a realistic option and that demolition was effectively necessary;
• contemporaneous survey evidence supporting that conclusion at the transaction date.

Even then, the position is fact-sensitive. Following Mudan, the bar for saying that a dwelling was not suitable for use is relatively high.

Outcome

A derelict property with structural damage and asbestos may, in some cases, be treated as non-residential for SDLT if the condition at completion was so severe that it was not suitable for use as a dwelling. However, this is not established simply by showing that the property was run-down, unsafe in some respects, or likely to be demolished later.

After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the courts require strong evidence that the building had genuinely lost its ability to function as a dwelling at the effective date of the transaction. The threshold is relatively high.

Practical Steps

If you are assessing whether a property was non-residential for SDLT purposes, it is sensible to gather evidence that existed at the transaction date, including:

• a full building survey or structural engineer’s report;
• any asbestos survey and recommendations;
• photographs showing the actual condition of the building at completion;
• contractor or engineer evidence on whether repair was realistically possible;
• evidence of any dangerous conditions preventing occupation.

You should then compare that evidence against section 116 Finance Act 2003 and the reasoning in Mudan. The key question is not whether major works were needed, but whether the building was actually suitable for use as a dwelling at that time.

Because SDLT is self-assessed, the taxpayer must ensure that the return reflects the correct legal analysis on the facts. A solicitor may help with the conveyancing, but SDLT classification ultimately depends on the taxpayer’s position and supporting evidence.

Conclusion

A property in severe disrepair is not automatically non-residential for SDLT. The legal test is whether it was suitable for use as a dwelling on the effective date of the transaction. Where there is serious structural failure, unsafe conditions, and evidence that demolition was effectively necessary, a non-residential argument may be available. But following Mudan, the threshold is now relatively high and requires strong contemporaneous evidence.

Legal References Used

• Finance Act 2003, section 116
• 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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