Is it worth claiming SDLT back if a house needed major repairs when bought?

Introduction

People often search for this issue after buying a damaged or run-down home and hearing that Stamp Duty Land Tax (SDLT) may have been overpaid. The usual argument is that, if the building was not suitable for use as a dwelling at the effective date of the transaction, the purchase might have been taxed at non-residential rates instead of residential rates.

That can sometimes produce a refund. But not every badly maintained property qualifies, and even where there is an arguable case, the tax saving may be modest. In some cases the likely refund is so small that pursuing the claim is not worthwhile.

The Question

A buyer purchased a home for £607,500. The property was an older dwelling in poor condition. It reportedly needed a full reroof, and part of the structure was said to require demolition after roof collapse. The buyer had paid just over £20,000 in SDLT and wanted to know whether a refund claim based on the property being unsuitable for use as a dwelling was worth pursuing.

Nick’s Explanation

Nick first identified the key issue: whether any higher residential rate had been paid and whether the property could realistically be said to have been unsuitable for use as a dwelling at the date of purchase.

He explained, in substance, that if a buyer paid residential SDLT but the property was in fact not suitable for use as a dwelling, there may be an argument that non-residential rates should have applied instead.

He also noted an important point of law: the legal test for whether a property is suitable for use as a dwelling has become stricter. In anonymised form, his view was that there might be an argument on the facts, but the numbers still mattered.

After comparing the SDLT due at residential and non-residential rates, he calculated:

• Residential SDLT: £20,375
• Non-residential SDLT: £19,875
• Potential reduction in SDLT: £500

He then concluded that, after allowing for professional costs, the likely net benefit was too small to make the claim worthwhile.

The Law

SDLT is charged under the Finance Act 2003. The amount due depends on the nature of the property and the rates in force at the effective date of the transaction.

Broadly, a purchase of residential property is taxed using residential rates. A purchase of non-residential or mixed property is taxed using non-residential rates. In some cases, a building that looks like a house may still fall outside the residential rules if, at the relevant date, it was not suitable for use as a dwelling.

The question of suitability is highly fact-sensitive. The tribunal and appellate courts have repeatedly considered whether serious disrepair, lack of services, structural failure, or other defects mean that a building is not suitable for use as a dwelling.

For current purposes, the important point is that the threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. A property does not stop being a dwelling merely because it is dilapidated, inconvenient, or in need of substantial repair. The defects usually need to be serious enough that, viewed realistically at the effective date, the building was not suitable for residential use.

Analysis

The analysis usually has two parts: first, whether there is a viable legal argument; second, whether the numbers justify making the claim.

On the facts described, the property had major defects. A full reroof and partial demolition due to roof collapse are potentially relevant indicators of serious disrepair. Depending on the evidence, those facts could support an argument that the building was not suitable for use as a dwelling on completion.

However, the legal test is not simply whether the property was in bad condition or whether works were expensive. The real question is whether the building crossed the line from a damaged dwelling into one that was no longer suitable for residential use at all.

Following Mudan, that line is harder to establish than many buyers assume. A property can still count as residential even if it is unsafe in parts, requires major structural work, or is not immediately comfortable to occupy. The court’s approach means that only more extreme cases are likely to succeed.

Even if one assumes, for the sake of calculation, that the buyer could bring the transaction within non-residential treatment, the tax difference here was small. On a price of £607,500, the difference between the residential and non-residential SDLT figures provided was only £500.

That matters because a claim is not just about legal merit. It also involves time, evidence gathering, analysis of the condition at the effective date, and often professional fees. If the gross saving is only £500, the net recovery may be too low to justify the effort and cost.

It is also notable that the SDLT paid was around the ordinary residential amount for that price level, rather than reflecting a substantial additional higher-rate charge. In practical terms, where the extra 3% surcharge is not the main issue, the available refund can be much smaller than people expect.

Outcome

The practical conclusion is that a damaged property does not automatically create a worthwhile SDLT refund claim. Even where there is some basis for arguing the property was not suitable for use as a dwelling, the current legal threshold is high and the tax saving may be limited.

On these figures, the likely SDLT reduction was only £500. That means the claim was unlikely to be worth pursuing once costs and effort were taken into account.

Practical Steps

If you are assessing a similar case, the sensible steps are:

1. Confirm the exact SDLT originally paid and whether any 3% higher rates were included.
2. Check the purchase price and recalculate SDLT on both residential and non-residential bases as at the transaction date.
3. Gather contemporaneous evidence of condition at completion, such as surveys, lender reports, structural reports, photographs, contractor evidence, and correspondence from the time.
4. Focus on whether the defects made the building genuinely unsuitable for residential use, not just in need of repair or renovation.
5. Assess the likely gross refund before spending money on a formal claim.
6. Weigh that figure against professional fees, the strength of the evidence, and the stricter approach now taken by the courts.

If the possible refund is only a few hundred pounds, many buyers will decide that the claim is not commercially sensible, even if there is an arguable legal point.

Conclusion

A property needing major works may sometimes support an SDLT refund argument, but the legal test for being unsuitable for use as a dwelling is now demanding. After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the condition threshold is relatively high. In a case where the maximum likely SDLT saving is only about £500, it is often not worth pursuing.

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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