Is auction land with a dilapidated shed subject to non-residential SDLT?

Introduction

Buyers often ask whether a plot bought at auction should be taxed as residential or non-residential for Stamp Duty Land Tax (SDLT). The answer matters because the SDLT rates are different, and the classification depends on what is being bought at the effective date of the transaction, not simply on what the buyer plans to do with it later.

A common example is a parcel of land with no obvious dwelling on it, perhaps with an old garage, shed or other derelict structure. In that situation, the key question is whether the land is residential property for SDLT purposes, or whether it is non-residential or mixed property.

The Question

A buyer purchased a plot at auction from a public authority. The site appeared to be bare land with a dilapidated corrugated structure and no clear evidence of current residential use. The buyer intended to seek planning permission for residential development after completion and wanted to know whether the purchase could be treated as non-residential for SDLT.

Nick’s Explanation

Nick’s view was that, on the facts provided, the property appeared to be non-residential in nature. In his words, it “appears to be non-residential in nature”, and he noted that it looked like a former garage rather than a dwelling.

That is an important practical point. For SDLT, the starting point is the character of the land and buildings at the time of purchase. If what is being acquired is bare land or a site containing a non-residential structure such as a garage or shed, with no dwelling in existence, that will usually point towards non-residential treatment.

Nick also flagged a sensible precaution: if the conveyancing solicitor is unsure whether the property should be treated as residential or non-residential, the factual position should be checked carefully before the SDLT return is filed.

The Law

SDLT is charged under the Finance Act 2003. The distinction between residential and non-residential property is fundamental to the rate of tax.

Broadly:

• residential property includes a building that is used or suitable for use as a dwelling, and land that forms part of its garden or grounds
• non-residential property includes commercial property, agricultural land, and land that is not part of a dwelling or its grounds
• mixed property includes both residential and non-residential elements

The statutory rules are found principally in Finance Act 2003, section 116 and related SDLT provisions.

Where a buyer argues that a building is not residential because it is derelict or uninhabitable, the courts have made clear that the threshold is now relatively high. In an uninhabitable or not suitable for use case, the condition thresholds are now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

That said, a case about bare land or land with only a garage or shed is often simpler. If there is no dwelling at all at the effective date, the issue is usually not whether a dwelling is uninhabitable, but whether any dwelling exists in the first place.

Analysis

The SDLT position should be worked through in stages.

First, identify what was actually acquired on completion. If the site consists of land only, with perhaps a disused garage, shed or similar outbuilding, that does not of itself make the land residential.

Second, ask whether there is a building on the land that is used as a dwelling or suitable for use as a dwelling. A dilapidated metal shed or former garage will not normally be a dwelling. It is not enough that the buyer hopes to build homes there later.

Third, consider whether the land forms part of the garden or grounds of an existing dwelling. If the plot is a separate parcel sold off independently, with no dwelling included in the transaction, that usually supports non-residential treatment. The legal and factual relationship between the plot and any neighbouring houses may still need checking, but a standalone auction lot of bare land commonly falls on the non-residential side.

Fourth, ignore future intention except where it helps explain the commercial background. A plan to obtain planning permission for flats or a house after purchase does not convert bare land into residential property at the date of purchase.

Fifth, be careful not to rely on the “unsuitable for use” line of argument unless there is in fact an existing dwelling. If there is an actual house or flat on the site, the buyer may need to consider whether it is suitable for use as a dwelling. Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, that argument is now harder to run successfully because the courts have adopted a relatively demanding threshold. But where there is no dwelling at all, the better analysis is usually that the property is simply non-residential land.

Outcome

On the facts described, a plot of bare land with only a dilapidated shed or former garage is likely to be treated as non-residential property for SDLT purposes.

The intended residential development does not change that result. SDLT is assessed by reference to the property being acquired at the effective date of the transaction.

Practical Steps

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

• obtain the auction particulars, title documents and any planning history
• confirm whether any dwelling exists on the site at completion
• check whether the land is legally or physically part of the grounds of a neighbouring dwelling
• keep photographs, survey notes and sales particulars showing the actual condition and character of the site
• ensure the SDLT return reflects the correct classification at the effective date
• if there is any doubt, ask for specialist SDLT advice before filing the return

This evidence can be important if HMRC later asks why non-residential rates were used.

Conclusion

If a buyer acquires bare land or a site containing only a derelict shed or former garage, with no dwelling included in the transaction, the purchase will usually fall within non-residential SDLT treatment. The future plan to build homes is not the deciding factor. The key is the character of the property at completion.

Legal References Used

• Finance Act 2003
• Finance Act 2003, section 116
• 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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