Can you reclaim the 5% SDLT surcharge if a property needs rewiring, new windows and an old boiler?

Introduction

Buyers often ask whether they can reduce or reclaim Stamp Duty Land Tax (SDLT) where a property is in poor condition. This usually comes up when the buyer is paying the higher rates of SDLT, including the 5% surcharge, and the property needs major works before it can be comfortably lived in.

The key issue is not whether the property is dated or expensive to repair. The real question is whether, on the effective date of the transaction, the property was truly not suitable for use as a dwelling. That is a strict test, and the threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

The Question

A buyer is purchasing a residential property for occupation. The property has serious defects: the electrics do not work and need a full rewire, the boiler is very old, and the windows need replacing. The buyer expects to pay the 5% higher rate of SDLT on the purchase price and wants to know whether the condition of the property could justify reclaiming any SDLT.

Nick’s Explanation

Nick’s core point was that the answer depends first on which SDLT rates apply.

In anonymised form, his explanation was:

“If you are paying standard residential rates of stamp duty, then you are already paying the lowest stamp duty possible. If you paid higher rates of stamp duty and believe the property was not suitable for use as a dwelling due to its condition, you may be able to claim back the stamp duty. However, there are several caveats and risks.”

That is the right starting point. A property condition argument usually matters only where the buyer has paid higher residential rates and wants to argue that the property should not have been treated as residential at all. If that argument succeeds, the SDLT position can change significantly. But poor condition alone is not enough.

The Law

SDLT on land transactions is charged under the Finance Act 2003. Whether a property is taxed as residential or non-residential depends on the statutory definitions in that Act and how they have been interpreted by the courts.

For SDLT purposes, a building counts as residential property if it is used as a dwelling or is suitable for use as a dwelling, or is in the process of being constructed or adapted for such use.

That means a property can still be residential even if it is vacant, outdated, or in disrepair. The test is not whether the property is attractive, modern, mortgageable, or ready for immediate comfortable occupation. The question is whether it is suitable for use as a dwelling at the relevant date.

The courts have repeatedly treated this as a factual and objective test. In recent years, taxpayers have tried to argue that severe disrepair meant a property was not suitable for use as a dwelling, but the courts have generally applied the test strictly. The position is now especially important in light of Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, which confirms that the threshold for “not suitable for use” is relatively high.

Analysis

There are two separate steps here.

First, if the buyer is paying only standard residential SDLT rates, there is usually nothing to reclaim on this type of argument. Standard residential rates are already the ordinary charging basis for a dwelling.

Second, if the buyer is paying higher residential rates, including the 5% surcharge, the only realistic route to a refund based on condition is to show that the property should not have been treated as residential because it was not suitable for use as a dwelling on the effective date of the purchase.

That is where most claims fail.

Defects such as these:

• non-functioning electrics requiring a rewire,
• an old or outdated boiler,
• failed or poor windows,
• general disrepair,
• the need for renovation before comfortable occupation,

do not automatically mean the property is not suitable for use as a dwelling.

In practice, HMRC and the courts look for something more fundamental. Examples might include extreme structural failure, absence of basic facilities to such a degree that the building cannot realistically function as a home, or conditions so severe that the property has ceased to be usable as a dwelling at all. Even then, the evidence must be strong and focused on the exact condition at completion.

A property can be unpleasant, unsafe in some respects, or in need of major expenditure, yet still be treated as residential for SDLT purposes.

On the facts described here, the defects point to a property needing substantial refurbishment. But a full rewire, replacement windows, and an old boiler do not by themselves usually cross the legal threshold. Many older homes are bought in that condition and still remain “suitable for use as a dwelling” for SDLT purposes.

That is why these cases are risky. A buyer may feel the property was not realistically habitable without immediate works, but the legal test is narrower and more demanding than ordinary language about habitability.

Outcome

On these facts alone, a buyer should not assume there is a valid SDLT reclaim.

If the buyer is paying standard residential rates, there is generally no reclaim available on this issue.

If the buyer is paying the higher residential rates, a reclaim would depend on proving that the property was not suitable for use as a dwelling at completion. A property needing rewiring, a replacement heating system, and new windows will often still be treated as residential. Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the condition threshold for a successful “not suitable for use” argument is relatively high.

Practical Steps

If you are assessing a possible SDLT reclaim in a similar situation, the sensible steps are:

1. Confirm exactly which SDLT rates were paid, including whether the higher residential rates applied.
2. Identify the effective date of the transaction, because the property’s condition on that date is what matters.
3. Gather objective evidence from that time, such as survey reports, photographs, contractor reports, and any evidence showing the absence of essential living facilities.
4. Separate “needs renovation” from “not suitable for use as a dwelling”. They are not the same test.
5. Review recent case law carefully, especially Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.
6. Take specialist SDLT advice before filing an amendment or refund claim, because unsupported claims can be challenged by HMRC.

Conclusion

A property in poor condition does not automatically qualify for an SDLT refund. If you are paying the 5% higher residential rate, the argument only works if the property was genuinely not suitable for use as a dwelling at the time of purchase. That is now a demanding test, and defects such as failed electrics, an old boiler and poor windows will often not be enough on their own.

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.

See all questions and answers categorized in this sitemap. Or use Google site search below.