HMRC Loses SDLT Case on Dilapidated Property
Published 19 October 2026
A badly neglected house can still be a dwelling for tax purposes. That is the point HMRC has pushed for years, and the Court of Appeal has recently backed that view. Yet the First-tier Tribunal has now allowed an appeal where a former home had fallen so far into decline that it was no longer “suitable for use as a dwelling” when bought.
The case, Oakwood Great Oak Ltd v HMRC, matters because many buyers and advisers have struggled with the line between a repairable home and a non-residential property. The decision does not reopen every old refund claim. It does show what kind of evidence may be needed when arguing that a property has crossed the line.
This article is for general information only and is not legal or tax advice. SDLT treatment depends on the facts at the effective date of the transaction.
The key test is whether the property is suitable for use as a dwelling
For stamp duty land tax, the classification of land as residential or non-residential can make a significant difference to the tax due. Residential rates often produce a higher bill, especially where the higher rates for additional dwellings or corporate rules apply.
The central statutory wording is familiar but difficult in practice. A building counts as residential property if it is used as a dwelling or is “suitable for use as a dwelling”.
That wording creates a problem. A property may be unpleasant, unsafe, empty, outdated, stripped of fittings, or in need of major works. None of those points automatically mean it is unsuitable as a dwelling.
The question is not whether someone would choose to move in on day one. It is whether the building still has the essential character and practical capability of a dwelling.
That distinction has driven much of the recent litigation.
Why HMRC’s position hardened after Mudan
Before the Court of Appeal decision in Mudan & Anor v HMRC, some refund claims took an aggressive approach. Buyers were encouraged to argue that homes needing rewiring, a new boiler, damp treatment, or major refurbishment were not suitable for use as dwellings on completion.
HMRC resisted that view. Its position has long been that a house does not stop being a dwelling just because it is in poor repair.
In Mudan, the property had been empty for months. It had been vandalised. The boiler had been removed. It had rats and mice. The utilities did not work. Even so, HMRC succeeded.
The decision supported HMRC’s argument that the relevant test is not comfort, habitability in the everyday sense, or whether a purchaser could move in without work. If the property retains the fundamental characteristics of a dwelling, repairs may not be enough to change its status.
That led many advisers to treat “not suitable for use as a dwelling” as a very high bar. In many cases, that remains the right starting point.
But Oakwood Great Oak Ltd v HMRC shows the bar is not impossible to clear.
What happened in Oakwood Great Oak Ltd v HMRC
In Oakwood Great Oak Ltd v HMRC, the buyers acquired a substantial detached house for £2.4 million. The building had originally been constructed as a home and had only ever been used for residential purposes.
On the face of it, those facts helped HMRC. A large house with a residential history is not an obvious candidate for non-residential treatment.
The buyers took a different view. They submitted the SDLT return on the basis that the property was non-residential because its condition was so poor that it was no longer suitable for use as a dwelling. Their position was that the house needed to be demolished and the land redeveloped.
HMRC disagreed. The matter went to the First-tier Tribunal.
The tribunal allowed the appeal. It found that, by the effective date of the transaction, the property had deteriorated beyond the point of being merely a repairable house. It was no longer suitable for use as a dwelling.
That is the important point. The tribunal was not persuaded by the property’s original design, historic use, or appearance as a former home. It looked at the condition of the building at the relevant time.
The facts pointed to more than ordinary disrepair
The property had been vacant for around three years before completion. By the effective date, it had serious defects. The brief facts include serious structural issues and widespread damp. The buyers’ case was that demolition and redevelopment were required.
A property can be dilapidated in different ways. Some defects affect comfort or cost. Others go to whether the building can properly function as a dwelling at all.
The distinction may look like this:
Repairable residential property | Potentially unsuitable former dwelling |
Needs rewiring, new boiler, or replacement kitchen | Serious structural problems affect the building itself |
Utilities are disconnected but can be restored | Services are part of a wider condition showing the building cannot function as a home |
Damp or vandalism can be repaired in the usual way | Widespread damp, decay, and fabric failure point to fundamental deterioration |
Works are needed before occupation | Demolition or near-total reconstruction is realistically required |
The property remains recognisably and practically a house | The residential character has been overtaken by its physical state |
This does not mean one defect alone decides the issue. Tribunals look at the whole picture.
A missing boiler may not be enough. Non-working utilities may not be enough. Infestation may not be enough. The combination still matters, but after Mudan, buyers need to show something more than “unfit to move into”.
In Oakwood, the evidence appears to have persuaded the tribunal that the building had passed that point.
The effective date is the date that matters
One of the most practical lessons is timing. The tribunal looks at the property’s condition at the effective date of the transaction, usually completion.
A buyer cannot rely on later deterioration. Equally, HMRC cannot simply point to what the property used to be years earlier if the building had changed materially by completion.
That makes contemporaneous evidence valuable. The best evidence is created before exchange, at completion, or very soon after.
Useful evidence may include:
A full building survey recording the condition in detail
Structural engineer reports
Damp, timber, drainage, asbestos, or services reports where relevant
Photographs and videos dated around completion
Contractor reports explaining whether repair is realistic
Planning or redevelopment documents, if they reflect the actual condition
Insurance correspondence, safety notices, or local authority material where applicable
Evidence should be specific. A report saying “requires refurbishment” is much weaker than a report explaining that structural elements have failed, that the property is unsafe, or that demolition is the realistic course.
This decision does not undo Mudan
It would be easy to overread the case. Buyers should resist that temptation.
The First-tier Tribunal decision in Oakwood is fact-sensitive. It does not mean a vacant or run-down home is automatically non-residential. It also does not carry the same authority as a Court of Appeal decision.
Mudan remains highly important. It confirms that a property may still be residential even where:
It has been empty for a period
It has been vandalised
Essential fittings have been removed
Utilities are not working
Infestation is present
Significant repairs are needed
The lesson from Oakwood is narrower. There are cases where the physical condition is so severe that the building is no longer suitable for use as a dwelling. In those cases, the taxpayer needs strong evidence that the issue is fundamental, not just inconvenient or expensive.
What buyers can learn before filing a return
The biggest risk is treating this as a simple refund opportunity. HMRC is likely to continue challenging claims where it believes a property was still a dwelling in substance.
Before taking a non-residential position, buyers should ask several hard questions.
Was the building merely uninhabitable on completion
A house can be unsafe or unpleasant on completion but still suitable for use as a dwelling after repair. The test is not whether a reasonable person would sleep there that night.
If the defects are typical refurbishment issues, the claim is weaker. Examples include old wiring, dated heating, a broken kitchen, damaged plaster, missing bathroom fittings, or a garden that has grown wild.
Those matters may support a wider picture, but they rarely carry the argument alone.
Did the property retain the fundamental features of a home
A dwelling normally has a structure capable of providing shelter, rooms arranged for domestic living, and the potential for services such as water, electricity, heating, washing, and cooking.
If those features remain, HMRC may argue that the property is still residential, even if getting it back into use would be costly.
The stronger cases are those where the building fabric, safety, and practical condition show that the house cannot sensibly be used as a dwelling without works so extensive that they go beyond repair.
Was demolition genuinely required
Demolition is a powerful fact if it reflects the property’s true condition. It is less persuasive if it is simply the buyer’s development preference.
A purchaser may choose to demolish a house because the plot is valuable, because a new design would be more profitable, or because the existing layout is unattractive. That does not prove the old house was unsuitable for use as a dwelling.
The evidence needs to link demolition to condition. Structural reports and expert evidence matter here.
Does the paperwork tell a consistent story
HMRC will look at the whole transaction. Inconsistent documents can weaken a claim.
For example, a sale brochure describing a property as a family home in need of modernisation may sit uneasily with a later claim that it was not suitable as a dwelling. That wording is not decisive, but it can matter.
A consistent evidence trail helps. Survey reports, valuation notes, planning documents, and photographs should all support the same factual account.
How advisers should approach similar cases
Advisers should be careful with blanket advice. The legal test is simple to state but difficult to apply.
A sensible process is to separate three categories.
Clear residential cases
These are homes needing normal repair or refurbishment. They may be empty, damaged, or unattractive, but they retain the practical characteristics of dwellings.
Borderline cases
These involve significant defects, safety concerns, long vacancy, missing services, and high repair costs. They need close review. Many will still be residential after Mudan.
Potential non-residential cases
These involve severe structural failure, extensive decay, or conditions showing the building has ceased to be suitable for use as a dwelling. These are the cases where Oakwood may help, provided the evidence is strong.
The documentation should be gathered before the return is filed. If the position is challenged later, the buyer should not be trying to reconstruct the facts from memory.
The practical takeaway from the ruling
Oakwood Great Oak Ltd v HMRC is a useful reminder that HMRC does not win every dilapidated property case. A former house can fall so far into disrepair that it is no longer suitable for use as a dwelling.
But the decision is not a green light for weak claims. The test remains demanding. A property that needs major work may still be residential. The question is whether the building had lost, in practical terms, the ability to function as a dwelling at the effective date.
The safest lesson is simple: focus on evidence, not labels. “Dilapidated”, “uninhabitable”, and “needs work” are not enough on their own. Detailed proof of serious physical condition is what gives a claim its weight.
