Can a buy-to-let property qualify for non-residential SDLT because it was uninhabitable?

Introduction

Buyers sometimes discover after completion that a run-down property may not have been suitable for use as a dwelling on the purchase date. That matters because, in some cases, a property that is genuinely not suitable for use as a dwelling can fall outside the normal residential Stamp Duty Land Tax rules and instead be taxed at non-residential rates.

This is a difficult area. HMRC challenges many claims of this kind, and the legal threshold is now relatively high. Problems such as disrepair, missing services, damp, or the need for major works do not automatically mean a property was not suitable for use as a dwelling.

The Question

A buyer purchased a repossessed property in 2025 as a buy-to-let investment. At the date of purchase, the property had no live water or gas connection, needed a new damp course, and required roof repairs. The local authority later gave a council tax discount on the basis that the property was uninhabitable. The buyer wants to know whether that means the purchase could qualify for non-residential SDLT treatment, rather than the normal residential rules.

Nick’s Explanation

Nick’s response was cautious. He explained that claims based on a property being uninhabitable, or not suitable for use as a dwelling, are highly contentious with HMRC. He also made the practical point that the answer depends heavily on the evidence available for the condition of the property at the effective date of the transaction, such as photographs, surveys, and other contemporaneous records.

In substance, his view was that it is not possible to assess the position properly from a short description alone. A buyer needs detailed evidence showing the actual state of the property at completion before any reliable conclusion can be reached.

The Law

SDLT is charged under the Finance Act 2003. Whether residential or non-residential rates apply depends on the nature of the subject matter acquired at the effective date of the transaction.

For SDLT purposes, a building counts as residential property if it is used or suitable for use as a dwelling, or is in the process of being constructed or adapted for such use. If a building is not suitable for use as a dwelling at the effective date, the buyer may argue that the purchase should be treated as non-residential property instead.

The key issue is suitability for use as a dwelling on the completion date, not whether the buyer intended to let it out, renovate it, or whether the property was vacant or repossessed.

The courts have repeatedly shown that this is a fact-sensitive test. Importantly, the condition threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. That decision makes clear that serious disrepair does not necessarily prevent a building from still being suitable for use as a dwelling. The question is not whether the property was comfortable, modern, mortgageable, or ready for immediate occupation without works. The question is whether, viewed realistically, it remained suitable for use as a dwelling despite its defects.

A local authority council tax decision is not determinative for SDLT. A council tax exemption, discount, or classification may be relevant evidence, but it does not decide the SDLT position because the statutory tests are different.

Analysis

The starting point is that a buy-to-let purchase of a house or flat will normally be treated as residential property for SDLT. That remains true even if the property is empty, in poor repair, or bought as a refurbishment project.

The buyer’s points here are potentially relevant, but none is conclusive on its own:

• Repossession status does not itself affect SDLT classification.
• Absence of water and gas connections may be relevant, but much depends on whether the services were temporarily disconnected, capable of reconnection without major rebuilding, or whether the property lacked essential facilities altogether.
• Damp and roof defects may show serious disrepair, but many dwellings with those problems are still legally treated as dwellings for SDLT purposes.
• A council tax uninhabitable discount may help as supporting evidence, but it does not establish that the property was not suitable for use as a dwelling under the Finance Act 2003.

What usually matters most is the overall factual picture at completion. Questions that commonly arise include:

• Did the property still have the basic physical character of a home?
• Did it retain a kitchen, bathroom, toilet, and sleeping/living accommodation?
• Were the defects repair issues, or had the building ceased to function as a dwelling at all?
• Could a person realistically live there, even if only after minor reconnection or repair work?
• Was there structural failure or such severe damage that occupation as a dwelling was not realistic?

Following Mudan, the bar is high. A property can be in very poor condition and still be suitable for use as a dwelling. The courts are unlikely to accept a non-residential SDLT argument merely because the property needed extensive works, had no active utility supply, or had been classed by the council as uninhabitable for council tax purposes.

To succeed, a buyer usually needs strong contemporaneous evidence, such as:

• a survey or structural report prepared close to completion;
• dated photographs and videos showing the condition throughout the property;
• auction or sales particulars accurately describing the condition;
• builder or engineer reports identifying why occupation was not realistically possible;
• evidence about missing or unusable essential facilities;
• completion-date evidence showing the state of services and whether reconnection was straightforward or not.

Without that evidence, HMRC is likely to treat the purchase as residential and resist any refund claim.

Outcome

A buyer in this situation should not assume that a repossessed buy-to-let in poor condition automatically qualified for non-residential SDLT. On the facts described, there may be an argument worth reviewing, but it is far from certain and would depend on strong evidence of the property’s actual condition at the effective date.

The fact that the local authority gave a council tax discount for an uninhabitable property does not by itself mean the SDLT treatment was wrong. Given the relatively high threshold confirmed in Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, many properties needing substantial repair will still count as residential dwellings for SDLT.

Practical Steps

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

1. Identify the exact completion date, because the condition on that date is critical.
2. Collect contemporaneous evidence, including survey reports, photographs, videos, auction pack documents, and contractor assessments.
3. Check whether the property retained basic dwelling facilities at completion, even if they were damaged or not in good working order.
4. Review any council tax records, but treat them only as supporting material, not as proof of the SDLT answer.
5. Compare the facts carefully against the current case law, especially Mudan, because the legal threshold is now demanding.
6. Consider whether any SDLT amendment or repayment claim is still within time.

Conclusion

A property is not treated as non-residential for SDLT just because it was vacant, dilapidated, or required major refurbishment. The legal test is whether it was suitable for use as a dwelling at the effective date, and that threshold is now relatively high after Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. In any borderline case, the evidence of the property’s actual condition at completion is decisive.

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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