Can you reclaim the 3% SDLT surcharge if a property had serious defects when you bought it?

Introduction

Many buyers ask whether they can reclaim Stamp Duty Land Tax (SDLT), especially where they paid the 3% higher rates for an additional dwelling and later discovered that the property was in very poor condition. This issue usually turns on whether the dwelling was truly “unsuitable for use as a dwelling” on the effective date of the transaction.

That is an important legal test. It is not enough that the property needed work, had damp, mould, neglect, or was generally run down. The condition threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

The Question

A buyer wants to know whether they may be able to recover SDLT paid at the higher residential rates. The general scenario is this:

• the property was bought within the last four years;
• the property is in England or Northern Ireland;
• the property had serious condition issues when purchased, such as damp, mould, disrepair or neglect; and
• the buyer paid the 3% higher rates for an additional dwelling.

The key question is whether those defects were serious enough to mean that the building was not a dwelling for SDLT purposes at the date of purchase.

Nick’s Explanation

Nick’s explanation can be summarised in this way: a possible reclaim depends on much more than the fact that a property was in poor condition. The real issue is whether, at completion, the property was legally and practically suitable for use as a dwelling.

In anonymised terms, his point is that buyers often assume that damp, mould, neglect or a need for refurbishment automatically takes a property outside the residential SDLT rules. That is not correct. A property can still count as a dwelling even if it is unattractive, in bad repair, or not immediately comfortable to live in.

The question is whether the defects were so severe that the property had crossed the line from “run down dwelling” to “not suitable for use as a dwelling at all”. That is a much stricter test than many buyers expect.

The Law

SDLT is charged under the Finance Act 2003. For this issue, the main legal question is whether the subject matter of the purchase included a “dwelling” on the effective date of the transaction.

For higher rates purposes, the legislation looks at whether the buyer acquired a major interest in an additional dwelling. If what was bought was a dwelling, the higher residential rates may apply. If, however, the building was not suitable for use as a dwelling at the effective date, the surcharge may not have been due.

The relevant statutory framework is found in the Finance Act 2003, including:

• section 42 and following, dealing with chargeable interests and SDLT structure;
• Schedule 4ZA, which sets out the higher rates for additional dwellings; and
• the statutory concept of a “dwelling”, including whether a building is suitable for use as one.

HMRC and the courts have repeatedly treated this as a fact-sensitive question. The condition of the property at the effective date is critical. Later works, later expense, or a buyer’s future intention to renovate do not decide the issue.

The modern approach has been tightened by case law. In particular, Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799 confirms that the threshold for showing a property was unsuitable for use as a dwelling is relatively high.

Analysis

To assess whether a reclaim is realistic, the issue should be worked through in stages.

First, was the SDLT return filed and tax paid within the last four years?

In many cases, a buyer seeking repayment will need to be within the amendment or overpayment relief time limits. Timing is therefore important. If the purchase was too long ago, even a good substantive argument may be difficult to pursue procedurally.

Second, was the property in England or Northern Ireland?

SDLT applies in England and Northern Ireland. Different taxes apply in Scotland and Wales, so the analysis would differ there.

Third, did the buyer pay the higher rates for an additional dwelling?

If the 3% surcharge was never paid, there is no surcharge to reclaim. The issue only arises where the transaction was treated as the purchase of an additional dwelling.

Fourth, was there in fact a dwelling at the effective date?

This is the central question. The condition of the building must be examined as it stood on completion, not after strip-out works or after a survey of future repair costs. Relevant evidence may include:

• survey reports;
• photographs and videos taken close to completion;
• contract papers and auction particulars;
• builder or engineer reports;
• evidence of whether services such as water, electricity, heating and sanitation were functioning;
• whether the property had a usable kitchen, bathroom and sleeping accommodation; and
• whether occupation would have been unsafe or impossible in any real sense.

Fifth, were the defects merely serious disrepair, or did they make the property unsuitable for use as a dwelling?

This is where many claims fail. Problems such as damp, mould, outdated fittings, broken plaster, rotten finishes, or a need for modernisation do not necessarily prevent a building from being a dwelling. Even substantial refurbishment needs may still leave the property within the residential SDLT regime.

Following Mudan, the threshold is relatively high. The courts are unlikely to accept that a property was unsuitable for use as a dwelling merely because it was unpleasant, unhealthy, or expensive to repair. The defects must go further and show that, as at completion, the building was not realistically fit to function as a dwelling.

Sixth, what kinds of facts may support unsuitability?

Although each case turns on its own facts, stronger cases tend to involve conditions such as:

• no functioning bathroom or toilet at all;
• no working kitchen or means of basic domestic occupation;
• serious structural instability;
• conditions making occupation unsafe in a fundamental way;
• lack of essential services combined with wider defects; or
• such severe deterioration that the building had ceased to be practically usable as a home.

Seventh, what facts are usually not enough on their own?

• damp or mould;
• general neglect;
• dated or poor decorative condition;
• the need for rewiring, replumbing or heating upgrades;
• a property being unmortgageable on ordinary lending terms;
• the buyer intending a major refurbishment; or
• the local authority later requiring works.

These matters may help form part of the overall picture, but they do not automatically prove that the property was not a dwelling for SDLT purposes.

Outcome

A buyer may have a possible SDLT reclaim only if the condition of the property at completion was so severe that it was not suitable for use as a dwelling at that date. The fact that the property had damp, mould, neglect or required substantial renovation is not, by itself, enough.

Because of Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the condition threshold is now relatively high. In practice, many poor-condition properties will still be treated as dwellings, meaning the 3% surcharge was correctly charged.

Practical Steps

If you are assessing whether a reclaim may be available, the sensible next steps are:

1. Check the purchase date and whether you are still within the relevant SDLT time limits.
2. Obtain the SDLT return and confirm that the higher rates were actually paid.
3. Gather evidence showing the property’s exact condition at completion.
4. Focus on objective evidence of habitability, not just repair cost.
5. Ask whether the property lacked the basic features of a functioning dwelling.
6. Compare the facts carefully against the stricter approach confirmed in Mudan.
7. If making a reclaim, present a clear factual case tied to the statutory test and the condition on the effective date.

Conclusion

You cannot assume that a run-down property qualifies for an SDLT reclaim. The legal test is whether the building was unsuitable for use as a dwelling when bought, and that is now a demanding threshold. Serious defects may support a claim, but only where they show that the property had genuinely ceased to be a usable dwelling at the relevant date.

Legal References Used

• Finance Act 2003
• Finance Act 2003, Schedule 4ZA
• 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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