Does a property needing major repairs count as uninhabitable for SDLT?

Introduction

Buyers often ask whether a run-down house can be treated as “not suitable for use as a dwelling” for Stamp Duty Land Tax purposes. This matters because the answer can affect whether residential SDLT rates apply, or whether a different treatment may be available.

The difficulty is that serious disrepair does not automatically mean a property is legally uninhabitable. A building may need extensive works, modernisation, or even structural repairs, but still remain a dwelling in law. Recent case law has also made the threshold for showing that a property was not suitable for use relatively high.

The Question

A buyer was considering purchasing a residential property with a survey showing extensive defects. These included historic fire damage to roof timbers, possible asbestos-containing materials, outdated or unfit plumbing, heating and electrical systems, fire safety concerns, rodent activity, mould and condensation, structural decay to a chimney, retaining wall issues, subsidence risk, and major repairs needed to ceilings and floors.

The buyer wanted to know whether the condition of the property was serious enough for it to be treated as not suitable for use as a dwelling for SDLT purposes.

Nick’s Explanation

Nick’s view was that, although the survey showed extensive modernisation and repair needs, the property still appeared to be a dwelling rather than a derelict building.

In substance, his explanation was that the property “requires extensive modernisation” but “remains a dwelling and is not derelict”. In other words, the defects pointed to a house in poor condition, not necessarily one that had crossed the legal threshold into being unsuitable for use as a dwelling.

He also noted that the legal position depended in part on developing case law about what counts as a habitable property, and that it could be sensible to reassess once the appellate position was clearer.

The Law

The key SDLT issue is whether, at the effective date of the transaction, the property is “residential property”. Under the Finance Act 2003, residential property includes a building that 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 relevant date, that can affect how SDLT is charged. However, the test is not whether the property is attractive, mortgageable, modern, or free from defects. The question is whether it is suitable for use as a dwelling in a practical legal sense at the effective date of the transaction.

Tribunal and court decisions have repeatedly shown that this is a fact-sensitive exercise. Properties with serious disrepair have often still been held to be dwellings. The courts look at the overall condition of the building, the nature of the defects, and whether the building still retains the character and function of a home.

In an uninhabitable or not suitable for use case, the condition threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

Analysis

The starting point is that a house remains residential property unless its condition is so serious that it is no longer suitable for use as a dwelling at the purchase date.

Here, the survey points to multiple serious issues:

• historic fire damage to roof timbers;
• possible asbestos;
• old or defective essential services;
• fire safety concerns;
• rodent infestation evidence;
• mould and condensation;
• structural problems affecting a chimney and retaining wall;
• possible subsidence risk; and
• major repair needs to floors and ceilings.

Even so, those facts do not automatically establish that the property was not suitable for use as a dwelling. Why not?

First, many of these points describe a property requiring major works rather than a building that has ceased to function as a house. Old wiring, poor plumbing, damp, mould, asbestos risk, and structural defects are all serious matters, but they often point to disrepair and refurbishment rather than legal non-residential status.

Secondly, the courts distinguish between a dwelling that is defective and a building that is genuinely incapable of residential use. A house may be unsafe, inconvenient, or in need of complete renovation, yet still be a dwelling for SDLT.

Thirdly, the more recent authorities have tightened the approach. Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the bar is relatively high. The fact that a property needs expensive works, or that a surveyor identifies urgent defects, will not by itself be enough.

What usually matters is whether the building had, at the effective date:

• the physical character of a dwelling;
• the basic ability to be occupied as a home, even if imperfectly;
• defects that are reparable rather than amounting to destruction of residential function; and
• an overall state falling short of true dereliction.

On the facts described, the better view is that the property was still a dwelling in poor condition. The survey suggests extensive repair and modernisation, but not necessarily that the building had lost its essential character as a house.

The mention of additional land arrangements, title plans, or separate transfer documents does not in itself change the core suitability analysis. Those points may matter for other SDLT issues, such as whether land forms part of the garden or grounds, but they do not by themselves turn a damaged house into a non-dwelling.

Outcome

The practical conclusion is that a property with major defects and a long list of repair issues will not necessarily qualify as uninhabitable or not suitable for use as a dwelling for SDLT.

On these facts, the stronger view is that the property remained residential property at the relevant date, even though it required extensive works. A buyer should be cautious about assuming that a poor survey is enough to support a non-residential SDLT position.

Practical Steps

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

1. Review the condition at the effective date of the transaction, not after works begin.
2. Obtain the full survey and read the actual findings, not just the summary ratings.
3. Identify whether the defects show disrepair and obsolescence, or true loss of residential function.
4. Check whether essential parts of the building were still physically present and usable as a home.
5. Consider photographs, utility condition, kitchen and bathroom functionality, structural integrity, and whether occupation was realistically possible.
6. Compare the facts against current case law, especially the higher threshold confirmed by Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.
7. Take specialist SDLT advice before filing on the basis that the property was not suitable for use as a dwelling.

Conclusion

A house can be in very poor condition and still count as a dwelling for SDLT. Extensive repairs, outdated services, damp, structural concerns, or historic damage do not automatically make it uninhabitable in the legal sense. Following Mudan, the threshold is relatively high, so each case needs careful analysis of the property’s actual condition at the purchase date.

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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