Can you claim an SDLT refund for an uninhabitable property if you only paid normal residential rates?

Introduction

Buyers often ask whether poor condition, serious disrepair or an annexe can reduce Stamp Duty Land Tax (SDLT) in England. Two common issues arise. First, some buyers want to know whether a property that was allegedly uninhabitable at completion should have been taxed as non-residential rather than residential. Second, buyers of a house with an annexe often ask whether multiple dwellings relief (MDR) is available.

These questions matter because SDLT depends on the legal character of the property at the effective date of the transaction. But even where a property was in very bad condition, there is only a practical refund claim if too much tax was actually paid. Also, in England, MDR was abolished for most transactions from 1 June 2024.

The Question

A buyer purchased a dwelling in England for under £1 million and paid ordinary residential SDLT rates, not the higher rates for additional dwellings. The property was in severe disrepair, with problems such as leaks, damp, mould, defective services and infestation, and it later required extensive renovation. The buyer wanted to know whether there was any viable SDLT claim on the basis that the property was not suitable for use as a dwelling at completion.

The buyer also later asked a separate question about purchasing another home in England with a self-contained annexe and whether MDR might apply.

Nick’s Explanation

Nick’s core point was practical as well as legal. In anonymised form, his explanation was:

“If you purchased a property for less than £1 million and paid normal residential rates of stamp duty, it is generally not viable to argue the property should instead be treated as not suitable for use as a dwelling because, in many cases, there is no tax saving to recover. It is also much harder now to show that a property was not suitable for use as a dwelling. The current case law sets a relatively high threshold.”

He also explained that where a property in England includes an annexe, MDR is no longer available for transactions to which the abolition applies, because the relief was abolished from 1 June 2024.

The Law

SDLT is charged under the Finance Act 2003. Whether property is taxed at residential or non-residential rates depends on the statutory definition of “residential property”. Broadly, a building is residential if it is used or suitable for use as a dwelling, or is in the process of being constructed or adapted for such use, together with land that forms part of its garden or grounds.

The key statutory provisions are in Part 4 of the Finance Act 2003, especially section 55 and section 116.

For condition-based arguments, the issue is usually whether the property was “suitable for use as a dwelling” on the effective date of the transaction. That is a factual and legal test. The courts have made clear that the test is not whether the property was attractive, comfortable, modern, mortgageable or immediately convenient to occupy. The question is whether it was suitable for use as a dwelling in the statutory sense.

In uninhabitable or not suitable for use cases, the threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. Readers should understand that serious disrepair, health hazards, outdated services or the need for extensive works will not automatically take a property outside the definition of residential property. The modern approach is much stricter than many earlier taxpayers assumed.

On MDR, the position in England changed by legislation and government measure taking effect from 1 June 2024. For relevant English SDLT transactions from that date, MDR is no longer available.

Analysis

The first issue is whether there is any overpayment to reclaim.

If a buyer paid the normal residential rates on a purchase under £1 million, the practical value of an “uninhabitable” argument may be limited or nil. That is because a refund claim only succeeds if the SDLT originally paid exceeded the SDLT properly due under the correct treatment. In many sub-£1 million cases where only standard residential rates were paid, reclassifying the property may not produce a worthwhile saving, or may produce none at all, depending on the rates in force and the structure of the transaction.

The second issue is whether the property could realistically be said not to be suitable for use as a dwelling.

That argument is now difficult. The courts have moved away from a broader, more taxpayer-friendly view that severe disrepair or danger might be enough. Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the condition threshold is relatively high. The focus is on whether the defects are truly fundamental in a way that prevents the building from being suitable for use as a dwelling, rather than merely making it unpleasant, unhealthy, unsafe in some respects, or in need of major repair.

So defects such as damp, mould, leaks, infestation, old electrics, roof problems and the need for a full renovation may show that the property was in very poor condition. But they do not automatically prove that it was outside the SDLT definition of residential property. A building can still be residential even if no sensible buyer would wish to live in it without substantial works.

The third issue is timing. The relevant date is the effective date of the transaction, usually completion. Later events, including how much work was in fact carried out or whether the buyer later moved out, may support the factual picture but do not change the legal test. The question remains whether, at completion, the property was suitable for use as a dwelling in the statutory sense.

The fourth issue concerns the separate annexe question.

Before 1 June 2024, buyers in some circumstances argued that a house with a self-contained annexe involved more than one dwelling, potentially bringing MDR into play. But for English SDLT transactions caught by the abolition, that relief is no longer available. So even if the annexe appears physically self-contained, that no longer creates an MDR claim for a qualifying English purchase completed after the abolition date.

Outcome

For an English purchase under £1 million where the buyer paid only normal residential SDLT rates, an SDLT refund claim based on the property being uninhabitable is usually not viable in practice unless there is a real tax overpayment to recover. Even before looking at the evidence of condition, the numbers may simply not support a claim.

In any event, proving that a property was not suitable for use as a dwelling is now much harder. Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the courts apply a relatively high threshold. Serious disrepair alone is often not enough.

As for a house with a self-contained annexe in England, MDR is no longer available for transactions affected by the abolition from 1 June 2024. So that route is also generally closed for recent English purchases.

Practical Steps

If you are assessing your own SDLT position, work through these points:

1. Confirm the jurisdiction. SDLT applies in England and Northern Ireland. Wales and Scotland have different land transaction taxes and different relief regimes.
2. Check the completion date. This is critical, especially for MDR, because the English relief was abolished from 1 June 2024 for relevant transactions.
3. Check what SDLT was actually paid. You need to know whether you paid standard residential rates, higher rates for additional dwellings, or another amount.
4. Calculate whether any overpayment exists. If there is no difference between the SDLT paid and the SDLT that would have been due under the alternative analysis, there is no refund to claim.
5. Review the condition of the property at completion, not just afterwards. Gather surveys, photographs, completion statements, contractor reports and any contemporaneous evidence.
6. Apply the modern legal test carefully. Ask whether the defects were truly fundamental, bearing in mind the high threshold after Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.
7. For annexe cases, separate the “is it another dwelling?” question from the “is relief available?” question. In England, even if an annexe appears to be a separate dwelling, MDR may still be unavailable because the relief has been abolished.

Conclusion

If you bought a property in England for under £1 million, paid only normal residential SDLT rates and are considering an “uninhabitable” refund claim, the answer will often be no for two reasons: there may be no meaningful tax overpayment, and the legal threshold for showing a property was not suitable for use as a dwelling is now high. If your later purchase involved a self-contained annexe in England, MDR is generally no longer available for transactions affected by the abolition from 1 June 2024.

Legal References Used

• Finance Act 2003, Part 4
• Finance Act 2003, section 55
• Finance Act 2003, section 116
• Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799
• HM Government measure abolishing Multiple Dwellings Relief for relevant SDLT transactions from 1 June 2024

This page was last updated on 22 March 2026.

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