Can you reclaim SDLT if a house had serious defects when you bought it?

Introduction

Many buyers ask whether Stamp Duty Land Tax (SDLT) can be reclaimed if a property was in very poor condition at the date of purchase. This usually comes up where the buyer paid residential rates, sometimes including the higher rates, and later discovers major defects such as structural movement, leaking roofs, failed drains, damp, unsafe ceilings or a lack of working basic services.

The key legal question is not whether the property needed expensive works. It is whether, on the effective date of the transaction, the property was suitable for use as a dwelling. That is a high threshold. Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the condition threshold for saying a property was uninhabitable or not suitable for use is now relatively high.

The Question

A buyer used a property condition assessment tool and received a high score suggesting serious disrepair. The property had been bought for a substantial sum and SDLT was paid at the higher residential rates. Before purchase, a survey identified a leaking roof, badly blocked drains, damp, an old non-working boiler and damaged flooring. After completion, much more serious structural problems became apparent, including widespread cracking, fallen ceilings and subsidence-related damage.

The buyer wanted to know whether the condition of the property could support an SDLT reclaim on the basis that it was not suitable for residential use at the time of purchase.

Nick’s Explanation

Nick’s core point was that, where a property is truly too dangerous to live in and requires more than minor repairs, there has historically been an argument that it should not be treated as residential property for SDLT purposes. In anonymised form, his explanation was that a property with major defects that make it unsuitable for occupation may fall outside the residential rates.

He also noted that this area of law had been under active appellate consideration and that the legal position could change. That is important, because older commentary on “uninhabitable” properties does not always reflect the current position after the more recent authorities.

The practical message from Nick’s response is that the defects must be assessed as they existed at completion, not simply by reference to later discoveries or later deterioration. Evidence such as the pre-purchase survey, photographs, contractor reports and any material showing actual danger or inability to occupy the dwelling at the purchase date will be central.

The Law

SDLT is charged under the Finance Act 2003. Whether property is taxed at residential or non-residential rates depends on the nature of the property at the effective date of the transaction.

The starting point is that a building used or suitable for use as a dwelling is residential property for SDLT purposes. If it is residential property, the residential rates apply, and where relevant the higher rates for additional dwellings may also apply.

In disputes about derelict or damaged homes, the issue is usually whether the property was still “suitable for use as a dwelling” on completion. That is a factual and legal question. It is not enough that the property was unattractive, in poor repair, or required major expenditure. The condition must be so serious that the building was not suitable for residential use at that time.

The modern authorities have tightened this test. In particular, Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799 makes clear that the threshold is relatively high. A property does not cease to be residential merely because it has substantial defects, needs renovation, or is uncomfortable to occupy. The court’s approach requires close attention to whether the building remained capable of functioning as a dwelling in a real sense at the relevant date.

Analysis

In a case like this, the analysis usually works in five steps.

First, identify the exact condition of the property on the purchase date. Only defects existing at that point matter. Problems discovered later may help prove an earlier condition, but later deterioration by itself does not change the SDLT position retrospectively.

Second, separate serious disrepair from true unsuitability for use as a dwelling. A leaking roof, blocked drains, damp, damaged flooring and a failed boiler may all be serious and expensive, but they do not automatically mean the building was non-residential for SDLT purposes. Many defective homes are still treated as dwellings.

Third, look closely at the structural issues. Subsidence, widespread cracking and fallen ceilings can be highly significant. But the legal question remains whether those issues already made the property unsuitable for residential use at completion. If the more dramatic symptoms developed only after purchase, they may not support a reclaim. If they were present, visible and serious at completion, they may strengthen the argument.

Fourth, consider safety and basic functionality. Cases are stronger where there is evidence that occupation would have been dangerous or practically impossible at completion. For example, a property may be closer to the threshold if there was severe structural instability, no safe access, no functioning sanitation, or conditions creating immediate danger to occupants. Even then, the threshold remains high after Mudan.

Fifth, review the evidence objectively. Survey reports, engineer reports, photographs, quotations, insurance material, correspondence and contemporaneous notes are all relevant. A buyer’s later experience of extensive works is not enough on its own. HMRC and the courts will focus on what the evidence shows about suitability for use as a dwelling at the effective date.

Applied to the scenario described, there is clearly evidence of substantial defects. However, the fact that a survey flagged roof issues, drains, damp, a failed boiler and damaged flooring would not by itself guarantee a reclaim. The subsidence and ceiling failures could be much more important, but only if they can be tied back to the purchase date in a way that shows the property was already unsuitable for residential use then. Because the threshold is now relatively high, many properties needing major renovation will still be classed as residential.

Outcome

The practical conclusion is that a reclaim may be arguable only if the buyer can show that, on completion, the property was not suitable for use as a dwelling. Serious defects alone are not enough. After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the bar is relatively high, so claims based only on disrepair, renovation need, or expensive remedial works are less likely to succeed.

Where the most severe problems only became obvious after purchase, the case becomes more difficult unless expert evidence can show that those conditions already existed in a sufficiently serious form at completion.

Practical Steps

If you are assessing a possible SDLT reclaim in this type of case, the sensible next steps are:

• Obtain the full survey and any pre-purchase reports.
• Gather dated photographs, videos and contractor records from around completion.
• Check whether there is structural engineer evidence linking later damage back to the purchase date.
• Identify whether key services and facilities were functioning at completion, including heating, drainage, water, sanitation and safe structural integrity.
• Review whether the property was actually capable of being occupied as a dwelling on the completion date.
• Compare the facts against the current case law, especially the higher threshold confirmed in Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.
• Consider the SDLT filing date and whether any amendment or repayment claim is still in time.

Conclusion

A badly damaged house does not automatically qualify for non-residential SDLT treatment. The decisive issue is whether it was suitable for use as a dwelling at the date of purchase. Since Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, that threshold is relatively high. Buyers considering a reclaim should focus on strong contemporaneous evidence showing genuine unsuitability for residential use at completion.

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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