Can you reclaim SDLT if a property was uninhabitable at purchase?

Introduction

Many buyers ask whether Stamp Duty Land Tax (SDLT) can be reduced or reclaimed where a property was in very poor condition when it was bought. This usually comes up where the building had no working services, serious fire or structural damage, missing kitchen or bathroom facilities, broken windows, roof failure, or other defects said to make it unsuitable for use as a dwelling.

The issue matters because SDLT on residential property can be much higher than SDLT on non-residential or mixed-use property. If a building was not suitable for use as a dwelling at the effective date of the transaction, the tax treatment may be different. But the legal test is now strict, and recent case law has raised the threshold for showing that a property was truly uninhabitable.

The Question

A buyer purchased several properties, including one mixed-use freehold containing residential units and commercial elements, and another residential property said to be in very poor condition. The buyer described problems including long-term vacancy, squatters, disconnected electricity, no heating, smashed windows, a leaking roof, fire damage, damp, no working electrics, missing kitchen facilities, defective plumbing, and the need for major remedial works.

The buyer wanted to know whether these facts could support an SDLT reclaim and what evidence would be needed.

Nick’s Explanation

Nick’s main point was that the case first had to be classified correctly before any reclaim could be assessed. In anonymised form, his explanation was that:

• the condition of the property at the time of purchase is critical;
• strong evidence is needed, especially photographs from around completion, invoices, surveys and failed safety certificates;
• for a mixed-use purchase, it is also necessary to identify what part of the SDLT calculation related to the residential element; and
• only once the facts and evidence are clear can the likely reclaim be calculated.

He also asked an important question about the mixed-use transaction: what proportion of the SDLT liability had been attributed to the residential part of the purchase. That matters because if a transaction was already treated as mixed-use, any reclaim may only relate to the residential element or to an error in the original SDLT treatment.

In practical terms, his reasoning was that poor condition alone is not enough. The key question is whether the dwelling was genuinely not suitable for use as a dwelling on the effective date of the transaction, and that must be proved with contemporaneous evidence.

The Law

The starting point is the Finance Act 2003, which governs SDLT. Whether rates are residential, non-residential or mixed-use depends on the nature of the subject matter acquired at the effective date of the transaction.

Where a building is acquired as a dwelling, residential SDLT treatment usually applies. If the property is mixed-use, non-residential or mixed rates may apply. A long-running area of dispute has been whether a building that looks like a house or flat should still count as residential if, at completion, it was in such poor condition that it was not suitable for use as a dwelling.

HMRC’s approach has generally been restrictive. The courts have also made clear that the test is not whether the property needed work, was unattractive, or could not sensibly be lived in without refurbishment. The question is whether, viewed objectively at the relevant date, it was suitable for use as a dwelling.

That test is now particularly important following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. In uninhabitable or not suitable for use cases, the condition thresholds are now relatively high. The Court of Appeal confirmed that serious disrepair does not automatically stop a property being a dwelling for SDLT purposes. The focus is on actual suitability for use as a dwelling at the effective date, not on whether substantial repairs were needed or whether the buyer intended major renovation.

Analysis

The correct analysis usually involves four steps.

First, identify the type of transaction. If the purchase included both commercial and residential property, it may already have been a mixed-use transaction. In that case, the SDLT treatment may already have reflected non-residential or mixed rates. If so, the issue is not simply whether the residential units were uninhabitable, but whether the original SDLT return overstated the residential element or otherwise misapplied the rules.

Second, look at the condition of the property on the effective date of the transaction, usually completion. Evidence of later works is only useful if it helps prove the earlier condition. The strongest evidence usually includes:

• dated photographs and videos from around completion;
• survey reports;
• electrical, gas or safety reports showing failure or absence of essential services;
• invoices for replacement of core systems such as electrics, plumbing, heating, roofing or glazing;
• fire reports, insurance records or engineer reports where relevant; and
• completion statements and SDLT filing documents.

Third, test whether the defects go to suitability for use as a dwelling, rather than mere disrepair. For example:

• a missing or unusable kitchen may help, but will not always be enough on its own;
• lack of heating may support the argument, but may still be insufficient if the building remained basically habitable;
• disconnected electricity can be important, especially where the whole installation was unsafe or unusable;
• major fire damage affecting substantial parts of the building may be stronger evidence;
• roof failure, broken windows, severe damp, or unsafe services may help if they show the building could not realistically function as a dwelling at all.

Fourth, apply the post-Mudan threshold realistically. A property can still be a dwelling even if it is vacant, neglected, in poor decorative condition, missing some fittings, or in need of expensive repair. The courts now expect a high level of impairment before concluding that the building was not suitable for use as a dwelling.

On the facts described here, some features point towards a potentially stronger case than ordinary disrepair: disconnected electricity, no heating, smashed windows, leaking roof, and fire damage to part of the building. Likewise, a separate property said to have no working electrics, no kitchen at purchase, major damp, roof issues and the need for replacement boiler and bathrooms may justify careful review.

Even so, none of those facts guarantees a reclaim. The outcome would depend on whether the evidence shows that, at completion, the building had crossed the relatively high threshold for being unsuitable for use as a dwelling. After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, that is a more demanding test than many buyers assume.

Outcome

A buyer in this position may have an arguable SDLT reclaim, but only if the evidence shows more than serious disrepair or the need for renovation. The property must have been genuinely unsuitable for use as a dwelling at the effective date of the transaction.

If the purchase was mixed-use, the analysis must also consider how the residential part was valued and taxed on the original SDLT return. Any reclaim figure depends on that original treatment.

In short, a claim may be possible, but the legal threshold is now high and evidence is decisive.

Practical Steps

If you are assessing a possible SDLT reclaim in this type of case, take these steps:

1. Obtain the SDLT return, SDLT5 certificate if available, and completion statement.
2. Confirm whether the transaction was residential, non-residential or mixed-use when filed.
3. Gather dated photographs and videos from the time of purchase.
4. Collect surveys, failed safety certificates, engineer reports and contractor invoices.
5. Identify defects affecting core habitability: electricity, water, sanitation, heating, weatherproofing, fire damage and structural safety.
6. Separate evidence of pre-completion condition from improvements made after completion.
7. For mixed-use purchases, identify what value was attributed to the residential element in the SDLT calculation.
8. Review the facts against the stricter standard confirmed in Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

If key documents such as the SDLT5 are missing, that does not always end the matter, but the transaction still needs to be identified accurately from the available records.

Conclusion

You cannot assume that a run-down or derelict-looking property qualifies for an SDLT reclaim. The question is whether it was objectively unsuitable for use as a dwelling at completion, and that is now a relatively high threshold. Strong contemporaneous evidence and correct analysis of the original SDLT treatment are essential, especially in mixed-use cases.

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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