Are two auction property purchases on separate titles linked transactions for SDLT?

Introduction

Buyers often ask whether two property purchases being completed together should be treated as linked transactions for Stamp Duty Land Tax (SDLT). This matters because linked transaction treatment can change both the SDLT rates and the total tax due.

A common example is where a buyer acquires a commercial or mixed-use building on one title and adjoining development land on another title, but the two parts are owned by different sellers who may be related or connected. In that situation, the SDLT answer usually turns on two questions: whether the transactions are linked, and whether the overall purchase is residential, non-residential or mixed-use.

The Question

A buyer was purchasing, at auction, two connected pieces of property for a total price of about £375,000. One title comprised a shop with upper floors that had planning permission for residential conversion. The second title comprised land to the rear with planning permission for new flats. The front property was owned by an individual. The rear land was owned by a company. The individual owner of the front property was also a director of the company that owned the rear land and held a very small shareholding in that company.

The issue was whether these purchases would be treated as linked transactions for SDLT, and if so whether the SDLT should be charged at residential or non-residential rates.

Nick’s Explanation

Nick identified two main issues:

• whether the purchases were linked transactions; and
• whether the transaction should be treated as residential or non-residential for SDLT purposes.

In summary, his explanation was that linked transaction treatment depends on whether the purchases form part of a single scheme, arrangement or series of transactions between the same buyer and seller, or persons connected with them.

He pointed to the importance of the connected persons rules. In anonymised terms, his reasoning was that if the individual seller had control of the company selling the second title, or if the people controlling the company were relatives or otherwise connected with that individual, there was a real possibility that the transactions would be linked. If, however, the individual’s role as director and small shareholding did not amount to control, and the controllers of the company were not connected with him, there could be an argument that the purchases were not linked.

Nick also explained that if the acquisitions were linked and one part of the purchase included a non-residential element such as a shop, the overall linked transaction would generally be taxed at non-residential or mixed-use SDLT rates rather than residential rates. In practical terms, that can produce a lower SDLT figure than treating the residential element separately.

He further suggested that it was worth comparing the SDLT position on both a residential and mixed-use basis because, where a land transaction is genuinely mixed-use, that often produces the lower SDLT charge.

The Law

The main SDLT rules are found in the Finance Act 2003.

For linked transactions, the key rule is in section 108 Finance Act 2003. Broadly, transactions are linked if they form part of a single scheme, arrangement or series of transactions between the same vendor and purchaser, or persons connected with them.

Whether persons are connected is determined by the tax connected persons rules, including section 1122 of the Corporation Tax Act 2010. Those rules are detailed and can connect individuals with companies they control, and can also attribute control through relatives and associates in some circumstances.

For SDLT rate purposes, the distinction between residential and non-residential or mixed-use property is critical. Under Finance Act 2003, non-residential property includes commercial property and land that is not residential property. A transaction can also be mixed-use if it includes both residential and non-residential elements. Mixed-use transactions are charged at non-residential SDLT rates.

Planning permission is not, by itself, decisive. Land with permission for dwellings is not automatically residential property for SDLT. The factual nature of what is being acquired still matters.

Analysis

The first step is to ask whether there are two separate land transactions. Here, there are two titles and two sellers, so on the face of it there are two separate acquisitions.

The second step is to ask whether they are linked under section 108 Finance Act 2003. The fact that the buyer acquires both interests at the same auction, or as part of the same overall deal, points towards a single scheme or arrangement. But because the sellers are different, the crucial issue becomes whether those sellers are connected persons.

If the individual seller controls the company selling the rear land, the connected persons test may be satisfied. A directorship alone does not necessarily amount to control. A 1% shareholding alone also would not usually amount to control. But that is not the end of the matter. Control can arise through voting power, rights under the company’s constitution, shareholder agreements, or attribution from relatives and associates depending on the facts.

So if the company’s other shareholders or controllers are relatives of the individual seller, that may be enough to bring the sellers within the connected persons rules. If that is right, the transactions are likely to be linked.

If the sellers are not connected, there is a stronger argument that the purchases are not linked, even though they are commercially related and bought together.

The third step is classification. If the purchases are linked, the SDLT treatment looks at the linked transaction as a whole. Where one part includes a shop or other commercial element, that usually means the linked transaction is non-residential or mixed-use, so the non-residential SDLT rates apply.

That can be important because residential rates are often higher, and the higher rates for additional dwellings do not apply to a genuinely non-residential or mixed-use acquisition in the same way.

In a case like this, the shop element is a strong indicator of non-residential or mixed-use treatment. The rear land with planning permission for flats may still require careful classification, but if acquired together with a commercial title as part of a linked purchase, the presence of the commercial element usually pushes the overall linked transaction into non-residential treatment.

If, on the other hand, the transactions are not linked, each purchase must be tested separately. The shop title would usually be non-residential. The rear land would need separate analysis based on what exactly is being acquired and whether it falls within the SDLT definition of residential property.

Outcome

The practical conclusion is that the linked transaction question depends mainly on whether the two sellers are connected for tax purposes.

If they are connected, the purchases are likely to be linked. If linked, and one title includes a shop, the overall SDLT treatment is likely to be non-residential or mixed-use, which may reduce the SDLT bill.

If they are not connected, there is a reasonable argument that the acquisitions are not linked, and SDLT would then be worked out separately for each title.

On the facts described, a small shareholding and a directorship do not automatically prove control, but family ownership or family control of the company could make a major difference.

Practical Steps

To assess the SDLT position properly, a buyer should gather the following before completion:

• the auction legal pack for both titles;
• the contract structure and whether the purchases are conditional on each other;
• the company’s shareholder information and confirmation of who controls it;
• details of any family relationship between the individual seller and the company’s controllers;
• the planning documents for each title;
• a separate valuation or price apportionment for each title if SDLT may need to be calculated separately.

The buyer should then test the transaction in at least two ways:

1. whether the purchases are linked or not linked; and
2. whether the subject matter is residential, non-residential or mixed-use.

If there is uncertainty over connected persons or classification, the paperwork should be reviewed carefully against section 108 Finance Act 2003 and section 1122 Corporation Tax Act 2010, because the answer can materially affect the SDLT return and the amount payable.

Conclusion

Two property purchases on separate titles can be linked for SDLT even where they have different sellers, but only if the sellers are connected and the transactions form part of a single scheme or arrangement. In a case involving a shop and development land, linked treatment may actually help because the non-residential or mixed-use SDLT rates can apply to the whole linked purchase. The key factual question is who really controls the company seller and whether that control links it to the individual seller.

Legal References Used

• Finance Act 2003, section 108
• Finance Act 2003, SDLT residential and non-residential charging provisions
• Corporation Tax Act 2010, section 1122

This page was last updated on 22 March 2026.

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