SDLT Reclaims for Uninhabitable Property After Mudan v HMRC

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What happens after an initial stamp duty reclaim review?
Introduction
Many people looking into a possible Stamp Duty Land Tax refund want to know what happens after an initial review. In most cases, the first discussion is only the starting point. The next step is usually to gather the key facts and documents so the position can be checked properly.
This article explains that process in general terms and sets out what information is normally needed before any reliable view can be given on a potential SDLT reclaim.
The Question
A property buyer had an initial discussion with a stamp duty adviser and then confirmed that they would locate the relevant details and send them over so the matter could be reviewed further. The practical issue is what this means in an SDLT reclaim context and what information is usually needed before the adviser can assess the case.
Nick’s Explanation
Nick’s response was brief and simply acknowledged that the buyer would send the details so the review could continue.
The substance of that exchange is that no firm conclusion had yet been reached. The buyer needed to provide the underlying facts and paperwork first, and only then could the adviser assess whether there was any valid basis for a reclaim.
Put another way, an initial call does not by itself establish entitlement to a refund. A proper SDLT analysis depends on the transaction details, the condition of the property at the effective date, the buyer’s ownership position, and the return originally filed.
The Law
Stamp Duty Land Tax is charged under the Finance Act 2003. Whether too much SDLT was paid depends on the facts of the transaction and the way the legislation applied on the effective date of purchase.
Common areas where a reclaim may arise include:
- whether the higher rates for additional dwellings were applied correctly under Schedule 4ZA Finance Act 2003;
- whether the property was residential, non-residential, or mixed-use for SDLT purposes;
- whether the dwelling was suitable for use as a dwelling at the effective date;
- whether any relief or exemption was available but not claimed; and
- whether the return contained a factual or legal error.
Where a buyer argues that a property was not suitable for use as a dwelling, the legal threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. The condition must be serious enough, viewed at the relevant date, to take the property outside the normal residential SDLT treatment. Ordinary disrepair, dated condition, or the need for renovation will often not be enough.
Analysis
In practice, an SDLT reclaim review usually proceeds in stages.
The adviser identifies the transaction basics. This usually includes the purchase price, completion date, SDLT paid, and the basis on which the original return was submitted.
The adviser checks the factual scenario. For example, they may need to know whether the buyer owned another dwelling at the time, whether the property included non-residential land, or whether there were serious issues with habitability.
The adviser reviews the documents. These often include the SDLT return, completion statement, contract, transfer, title documents, valuation material, photographs, surveys, and any correspondence relevant to the property’s condition or use.
The adviser compares those facts against the legislation and current case law. This is the point at which a reclaim may appear strong, weak, or not viable at all.
If there is a proper legal basis, the adviser can then consider whether an amendment, overpayment relief claim, or other formal route is available within the applicable time limits.
The key point is that a reclaim cannot safely be judged from a short introductory exchange alone. The supporting evidence matters. That is especially true in cases involving mixed-use arguments or claims that a property was uninhabitable, because those issues are highly fact-sensitive.
For uninhabitable property cases in particular, readers should be cautious. After Mudan, the bar is higher than many people assume. A property may need substantial work and still remain treated as residential for SDLT purposes if it was fundamentally still a dwelling at the effective date.
Outcome
The practical conclusion is that the matter remains open until the relevant information is provided and reviewed. Sending the documents is the necessary next step. Only after that can a reliable view be formed on whether there is a genuine SDLT reclaim opportunity.
Practical Steps
If you are in a similar position, gather the following before seeking a firm opinion:
- the SDLT return and SDLT5 certificate;
- the completion statement and purchase contract;
- the transfer deed and title documents;
- any survey, valuation, or lender report;
- photographs and contractor evidence showing the property’s condition at completion;
- evidence of any land or buildings that may support a mixed-use argument;
- details of any other properties owned at the effective date; and
- any advice previously received about the SDLT treatment.
Once those materials are available, the next step is to test the facts against the correct statutory provisions and any relevant authorities. If the argument depends on habitability, the evidence should focus on the exact condition of the property at the effective date and whether the defects truly crossed the now demanding legal threshold.
Conclusion
An initial SDLT review is only the beginning. A refund claim depends on the underlying facts, the documents, and the legal basis for saying the original SDLT treatment was wrong. The sensible next step is to gather the transaction evidence and have it assessed against the legislation and current case law.
Legal References Used
- Finance Act 2003
- Schedule 4ZA 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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