Can you still claim SDLT relief because a property was uninhabitable?

Introduction

Many buyers ask whether a run-down or dangerous property can be treated as non-residential for Stamp Duty Land Tax purposes, so that less SDLT is due. That question has become much harder after recent case law. In particular, the courts have now made clear that the legal test is not simply whether the property was pleasant, safe or ready to occupy on the day of purchase.

The current position is that a building will often still count as residential property if it retains the basic character of a dwelling, even where it needs major repairs or renovation. In an uninhabitable or not suitable for use case, the condition thresholds are now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

The Question

A buyer had submitted, or was considering submitting, an SDLT claim on the basis that the property was uninhabitable when bought. The issue was whether the claim could still succeed after HMRC changed its approach and after the courts considered the meaning of “suitable for use as a dwelling” or “suitable for use as a single dwelling”. A related question was whether, if a claim was cancelled or withdrawn, any HMRC enquiry would remain open or be treated as closed.

Nick’s Explanation

Nick explained that HMRC had begun freezing and then formally enquiring into many uninhabitable property claims. He said that, after the Mudan litigation, HMRC’s position became much firmer and most such claims were no longer realistically sustainable.

In anonymised form, his explanation was that:

• if a property is accepted as uninhabitable for SDLT purposes, it may be treated as non-residential, which can reduce SDLT;
• HMRC had started placing these claims under review and then under formal enquiry;
• following the Mudan decision, there was little realistic scope to argue many ordinary disrepair cases;
• claims were therefore being cancelled or withdrawn, except possibly in extreme cases where the building was beyond repair and required demolition;
• where HMRC accepted withdrawal of the claims, the expectation was that enquiries would also be treated as closed or relabelled as withdrawn.

Nick’s key reasoning was that the courts now focus on the building’s fundamental nature, not just its immediate condition. In substance, if the property still looks and functions as a dwelling in its basic form, repair needs alone will usually not be enough.

The Law

SDLT is charged under the Finance Act 2003. Whether the residential or non-residential rates apply depends on the statutory definition of residential property.

The legislation broadly treats land as residential if it consists of or includes a building that is used or suitable for use as a dwelling, or is in the process of being constructed or adapted for such use.

The important phrase in these disputes is “suitable for use as a dwelling” or, in some arguments, “suitable for use as a single dwelling”. The courts have repeatedly had to decide what that means where a building is in poor condition.

The modern approach, now reinforced by appellate authority, is that the test is not limited to whether a person could move in immediately on completion. The court looks at the property’s essential character. If it remains, in substance, a dwelling, it will usually still be residential property for SDLT.

That means there is a clear distinction between:

• a property needing repair, refurbishment, modernisation or even substantial renovation; and
• a property so far gone that it has effectively ceased to be suitable as a dwelling at all, often because demolition or complete reconstruction is required.

The buyer’s ability to amend or correct an SDLT return is also governed by the Finance Act 2003, but practical rights to amend can be affected if HMRC has opened an enquiry or has already issued a closure determination.

Analysis

When applying the law, it helps to work through the issue in stages.

First, ask what the property fundamentally was at the effective date of the transaction. Was it still recognisable as a house or flat with the normal characteristics of a dwelling, even if in poor condition? If yes, that points strongly towards residential treatment.

Second, separate disrepair from destruction. Missing kitchen units, defective wiring, damp, unsafe flooring, a failed boiler, water damage, broken windows, infestation, or a need for extensive renovation may all make occupation unattractive or even dangerous. But after Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, those facts will not usually be enough on their own if the building still retains the basic character of a dwelling.

Third, ask whether the works required are truly repairs and reinstatement, or whether the building has to be demolished or effectively rebuilt. That is where the threshold now sits. The stronger cases are those where the structure is beyond repair, where the dwelling has lost the features that make it a dwelling, or where demolition is genuinely required rather than merely commercially preferable.

Fourth, consider evidence. HMRC and the tribunals will expect objective material from the date of purchase, such as:

• survey reports;
• structural engineer evidence;
• photographs from the transaction date;
• contract papers and pre-purchase reports;
• local authority notices, if any;
• evidence that demolition or complete reconstruction was required.

Fifth, if a claim has been withdrawn while HMRC had opened an enquiry, the practical expectation may be that HMRC closes the enquiry as withdrawn or cancelled. But the exact procedural status still matters. A taxpayer should confirm whether HMRC has formally closed the enquiry, because amendment rights and next steps can depend on that status.

The overall effect of the recent authorities is that many claims once presented as “uninhabitable” are now unlikely to succeed. A property can be unfit to live in on the day of purchase and still be residential property for SDLT.

Outcome

The practical conclusion is that most SDLT “uninhabitable property” claims are now much weaker than they once appeared. A property that needs extensive repair or is dangerous to occupy does not automatically become non-residential. The question is whether it still had the essential nature of a dwelling.

Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the threshold for showing that a property was not suitable for use as a dwelling is relatively high. In most cases, only very extreme facts, often involving demolition or complete reconstruction, are likely to justify non-residential treatment.

Practical Steps

If you are assessing your own position, the sensible next steps are:

1. Review the exact condition of the property at the completion date, not months later.
2. Gather objective evidence from that date, especially surveys, structural reports and photographs.
3. Ask whether the building still retained the basic features of a dwelling.
4. Identify whether the works were repairs and renovation, or true demolition and rebuild.
5. Check whether HMRC has opened, closed or withdrawn any enquiry into the return or claim.
6. Review the amendment and claim time limits under the Finance Act 2003.
7. If the case is borderline, obtain specialist SDLT advice focused on current case law rather than older marketing material about “uninhabitable” claims.

If an earlier claim was cancelled or withdrawn, do not assume the procedural position without confirmation. The difference between an open enquiry and a closed enquiry can affect what can still be done.

Conclusion

Buyers still ask whether a derelict or unsafe property can be taxed as non-residential for SDLT. The answer is now usually no unless the facts are extreme. The courts have moved the focus away from immediate habitability and towards the property’s fundamental character. After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, only the strongest cases are likely to succeed.

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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