Can you reclaim SDLT if a property was uninhabitable when you bought it?

Introduction

Many buyers ask whether Stamp Duty Land Tax (SDLT) can be reduced or reclaimed where a property was in very poor condition at the time of purchase. The issue usually turns on whether the property was “suitable for use as a dwelling” on the effective date of the transaction. If it was not, the buyer may argue that the purchase should have been taxed as non-residential rather than residential.

This area has been heavily litigated. The courts have now made clear that the threshold for showing a dwelling was not suitable for use as a dwelling is relatively high. In particular, following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, ordinary disrepair, lack of modernisation, or the need for substantial works will usually not be enough.

The Question

A buyer purchased a property that was said to be uninhabitable or in very poor repair at completion. The buyer wants to know whether that condition means the property should be treated as non-residential for SDLT purposes, and whether it is sensible to submit or pause a reclaim while the courts clarify the law. The buyer is also concerned about the four-year time limit for amending or reclaiming SDLT.

Nick’s Explanation

Nick’s explanation can be summarised in two main points.

First, he explained that the claim depends on the difference between residential and non-residential SDLT treatment. In anonymised form, his point was that if a property is truly not suitable for use as a dwelling because of its condition, it may fall to be taxed as non-residential.

Secondly, he noted that the tribunal decisions had narrowed the circumstances in which that argument can succeed. His summary was, in substance, that where a building “cannot be reused and must be demolished”, it is more likely to fall outside residential treatment. By contrast, where a building remains structurally a dwelling and is capable of repair, the courts are much less likely to accept that it was non-residential.

He also highlighted the practical importance of timing. There is generally a four-year window for amending an SDLT return or making a reclaim, so buyers close to that deadline may need to act to preserve their position even if related litigation is still developing.

The Law

The starting point is the Finance Act 2003. SDLT applies different rates to residential and non-residential property. Whether property is residential is determined by the statutory definition in Schedule 4ZA and related provisions of the Finance Act 2003, including whether the property consists of or includes a building that is used or suitable for use as a dwelling.

The key phrase is “suitable for use as a dwelling”. That phrase has been considered in a line of cases, including Fiander and Brower v Revenue and Customs Commissioners [2020] UKUT 156 (TCC), later appellate decisions in the Mudan litigation, and now Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

The courts have treated this as an objective question. The focus is on the physical nature and character of the building at the effective date of the transaction, not simply whether a particular buyer intended to renovate it, or whether a mortgage lender, surveyor or local authority would have considered it fit for immediate occupation.

The case law shows that the test is not the same as day-one habitability in an everyday sense. A property can be unpleasant, unsafe in some respects, in need of major repairs, stripped out, or lacking modern facilities, and still remain “suitable for use as a dwelling” for SDLT purposes if it retains the essential character of a dwelling.

Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the condition threshold in uninhabitable or not suitable for use cases is now relatively high. The Court of Appeal confirmed that disrepair alone will rarely be enough. The stronger cases are those where the building has ceased, in substance, to be a dwelling at all, or where demolition rather than repair is the realistic route.

Analysis

To assess whether an SDLT reclaim is realistic, it helps to apply the rules step by step.

Step 1: identify the effective date. The relevant condition of the property is assessed at the effective date of the transaction, usually completion. Later works, later deterioration, or later demolition do not by themselves decide the issue.

Step 2: consider the building’s objective characteristics. Was there still a recognisable dwelling? Did it retain the basic physical features of a home, such as walls, roof, rooms, access, and domestic layout? If yes, that points strongly towards residential treatment.

Step 3: distinguish serious disrepair from loss of dwelling character. Rewiring, plumbing defects, damp, roof problems, missing kitchen units, broken bathrooms, outdated heating, unsafe electrics, or the need for extensive refurbishment may make occupation impractical or undesirable. But after Mudan, those facts do not necessarily mean the property was not suitable for use as a dwelling for SDLT purposes.

Step 4: ask whether repair or demolition was the realistic answer. If the building could only sensibly be dealt with by demolition and could not realistically be reused as a dwelling, that is much more consistent with non-residential treatment. Nick’s summary reflected this point. The closer the facts are to a building that has effectively lost its identity as a dwelling, the stronger the claim.

Step 5: consider litigation risk. HMRC has taken a firm stance on these claims. Where a return has already been amended or a refund obtained on weak facts, HMRC may enquire into the return and, in some cases, consider penalties if it believes the position was taken carelessly.

Step 6: consider the time limit. Even if the law is still developing, a buyer cannot ignore the statutory deadline. If the four-year amendment period is approaching, protective action may be needed so that the claim does not become time-barred.

Applied to most “uninhabitable property” scenarios, the result after Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799 is that many claims once thought arguable are now much weaker. The fact that a property needed extensive renovation is no longer enough on its own. The condition must be so severe that the building was not, in substance, a dwelling at the effective date.

Outcome

The practical conclusion is that a buyer cannot assume that a run-down or even uninhabitable property qualifies for non-residential SDLT rates. The current legal position sets a high bar. If the property remained structurally a dwelling and was capable of being repaired, residential SDLT treatment is likely to apply.

A reclaim is most likely to succeed only in more extreme cases, especially where the building lacked the essential nature of a dwelling or where demolition was the realistic and necessary outcome.

Practical Steps

If you are assessing a possible SDLT reclaim, the sensible next steps are:

• Check the effective date of the purchase and calculate the four-year deadline.
• Gather contemporaneous evidence of the property’s condition at completion, including surveys, photographs, contractor reports, insurance records and any valuation material.
• Focus on whether the evidence shows loss of dwelling character, not just severe disrepair.
• Consider whether the building was realistically repairable or whether demolition was truly necessary.
• Review the SDLT return originally filed and whether any amendment or reclaim is still possible within time.
• Measure the facts against Fiander and Brower v Revenue and Customs Commissioners [2020] UKUT 156 (TCC) and Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799 rather than relying on older marketing claims about “uninhabitable” properties.
• If a claim is already underway, reassess its strength in light of the current appellate authorities.

Conclusion

The law on uninhabitable property SDLT claims is now much stricter than many buyers expect. After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the threshold for showing a property was not suitable for use as a dwelling is relatively high. In most cases, serious disrepair will still leave the property classed as residential for SDLT purposes.

Legal References Used

• Finance Act 2003
• Finance Act 2003, Schedule 4ZA
• Fiander and Brower v Revenue and Customs Commissioners [2020] UKUT 156 (TCC)
• 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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