SDLT Non‑Resident Surcharge on Six‑Plus Flats and Mixed‑Use

Non‑UK buyers can still face the 2% SDLT surcharge, even on “six or more” blocks.

  • If the portfolio is all homes (flats/houses and their gardens), it is treated as residential, and the 2% non‑resident surcharge can apply on top of the “six or more dwellings” non‑residential rate table.
  • If there is any genuine commercial part (for example, a shop or office), the whole deal is “mixed‑use” and the 2% surcharge does not apply.
  • Next step: get specialist SDLT advice and list clearly which parts are residential and which are commercial.

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Do non-UK residents pay the 2% SDLT surcharge when buying six or more flats?

Introduction

This is a common Stamp Duty Land Tax question for overseas buyers investing in UK property through a company. Many people know that buying six or more dwellings in one transaction can bring the non-residential SDLT rates into play. The point that causes confusion is whether that automatically removes the 2% non-UK resident surcharge.

The short answer is no, not always. If the purchase is made up only of residential property, the 2% surcharge can still apply even though the rates charged are the non-residential rates. But if the transaction is genuinely mixed-use because it includes non-residential property, the surcharge does not apply.

The Question

An overseas buyer who is not UK tax resident plans to buy a large UK property portfolio through a UK company. The portfolio includes more than six dwellings, mainly flats, and one part of the portfolio also includes a shop and storage space. The buyer wants to know whether the additional 2% SDLT surcharge for non-UK residents must be paid on top of the usual SDLT rates.

Nick’s Explanation

Nick’s key point was that the SDLT result depends on why the non-residential rates apply.

He explained that where six or more dwellings are bought in a single transaction, section 116(7) Finance Act 2003 treats them as non-residential for rate purposes. However, that does not necessarily stop the transaction from being treated as a residential transaction for the purpose of the non-UK resident surcharge in section 75ZA.

In anonymised form, his reasoning was:

  • if a portfolio contains only residential property, buying six or more dwellings means the non-residential rate table applies;
  • but the transaction can still remain residential in character for section 75ZA;
  • so the 2% non-UK resident surcharge can still be added to the rates;
  • if the portfolio includes at least one true non-residential element, such as a shop, the transaction is mixed-use instead;
  • in that case, the 2% surcharge does not apply.

He also noted that this distinction can make a substantial difference to the SDLT bill and should be checked carefully during due diligence.

The Law

The main provisions are in the Finance Act 2003.

  • Section 116 defines “residential property”. Broadly, this means a building used or suitable for use as a dwelling, or in the process of being built or adapted for such use, together with land that forms its garden or grounds.

  • Section 116(7) provides that where six or more separate dwellings are acquired in a single transaction, those dwellings are treated as non-residential property for SDLT purposes.

  • Section 55 sets the SDLT rates. Table B contains the non-residential and mixed-use rates.

  • Section 55(1B) is relevant where a transaction includes both residential and non-residential property. In that case, the transaction is taxed using the non-residential or mixed-use rate structure.

  • Section 75ZA imposes the 2% surcharge for non-UK resident transactions. Under section 75ZA(1), 2% is added to each rate in the relevant rate table where the transaction falls within the surcharge rules.

The important legal distinction is this:

  • a transaction may be charged at non-residential rates because six or more dwellings are acquired; but

  • that does not automatically mean it is a mixed-use transaction or that the non-resident surcharge is switched off.

Analysis

It helps to work through the rules in stages.

Step 1: Is the subject matter residential property?

If the assets being bought are flats, houses, or other dwellings, they fall within section 116 as residential property. If the portfolio consists only of dwellings, it starts as a residential property transaction.

Step 2: Are six or more dwellings being acquired in one transaction?

If yes, section 116(7) applies. That means the dwellings are treated as non-residential for SDLT rate purposes. So the buyer uses the non-residential rate table rather than the standard residential rate table.

Step 3: Does that alone prevent the 2% non-UK resident surcharge?

No. This is the point many buyers miss. The six-or-more rule changes the rate treatment, but it does not necessarily change the underlying nature of the transaction into a mixed-use transaction. If what is being bought is still only residential property, section 75ZA can still apply.

Step 4: What happens if the transaction includes a genuine non-residential element?

If there is at least one non-residential property in the same transaction, such as a shop, office, commercial unit, or land that is not part of a dwelling’s garden or grounds, the transaction becomes mixed-use. In that situation, the non-residential rates apply because the transaction is mixed-use, and the 2% non-UK resident surcharge does not apply.

Step 5: Applying that to a portfolio purchase

Where a buyer acquires a large portfolio containing many flats and at least one block that includes a shop and storage area, there are two separate reasons why the non-residential rates may apply:

  • the purchase includes six or more dwellings; and

  • the purchase includes non-residential property.

The second reason is the crucial one for the surcharge point. Because the transaction is mixed-use, the 2% surcharge is not charged.

Step 6: Why careful classification matters

The non-residential element must be genuine. Buyers should not assume that every ancillary area, common part, or unusual title arrangement will qualify. The facts and the legal interests being acquired need to be checked closely.

Similarly, if an argument is made that a building is not suitable for use as a dwelling, the current threshold is relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. A property will not fall outside the residential definition merely because it needs repair or refurbishment. The condition must be serious enough to meet the now stricter standard for showing that the building was not suitable for use as a dwelling at the effective date of the transaction.

Outcome

The practical conclusion is:

  • if a non-UK resident buyer acquires six or more dwellings in one transaction and the portfolio contains only residential property, the non-residential SDLT rates apply, but the 2% non-UK resident surcharge can still be added;

  • if the same transaction includes at least one genuine non-residential element, making it mixed-use, the non-residential rates apply and the 2% surcharge does not apply.

In a portfolio that includes flats plus a shop and storage area in the same acquisition, the transaction is capable of being treated as mixed-use, so the surcharge should not apply.

Practical Steps

  • Check exactly what is being bought under the contract, including every title and every unit.

  • Confirm whether the transaction includes any genuine non-residential property, such as a shop, office, yard, or other commercial element.

  • Do not assume that the six-or-more rule alone removes the 2% surcharge.

  • Review whether all elements are being acquired in a single linked transaction or under separate contracts, because that can affect the SDLT analysis.

  • Consider the legal nature of the interests being acquired, especially where there are leasehold titles, freeholds, headleases, or unusual title structures.

  • If any argument depends on a property being uninhabitable or not suitable for use as a dwelling, test that carefully against Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, because the threshold is now relatively high.

  • Make sure the SDLT return reflects the correct basis for the treatment adopted.

Conclusion

Buying six or more dwellings does not by itself remove the 2% SDLT surcharge for non-UK residents. It only changes the rate table used. To avoid the surcharge, the transaction must be genuinely mixed-use, with at least one non-residential element included in the same purchase.

Legal References Used

  • Finance Act 2003, section 55

  • Finance Act 2003, section 55(1B)

  • Finance Act 2003, section 75ZA

  • Finance Act 2003, section 75ZA(1)

  • Finance Act 2003, section 116

  • Finance Act 2003, section 116(7)

  • 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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