Can a buyer claim non-residential SDLT rates when buying a large residential portfolio?

Introduction

Buyers of large property portfolios often ask whether Stamp Duty Land Tax (SDLT) can be charged at the non-residential or mixed-use rates rather than the higher residential rates. This matters because the tax difference can be substantial on portfolio purchases running into the millions.

The answer usually turns on two questions: how many dwellings are being bought in a single transaction, and whether any part of the transaction includes non-residential property such as a shop, office or storage area not forming part of a dwelling.

Where a portfolio contains six or more dwellings bought in one transaction, the SDLT rules can treat the purchase as non-residential. That can apply even if most or all of the assets are residential.

The Question

A buyer is considering two separate portfolio purchases. One portfolio contains more than 40 properties, including a small number of mixed-use properties. The other contains more than 50 properties, including several unsplit blocks of flats, individual flats and houses, and one block that includes a shop and storage area.

Most of the titles are leasehold. In some cases the seller also holds the freehold title, but there is a head lease in place. The buyer wants to know whether each portfolio can be taxed at the non-residential or mixed-use SDLT rates, and whether there is any need to restructure the transaction to reduce SDLT.

Nick’s Explanation

Nick’s core point was that the starting place is the statutory definition of residential property in section 116 of the Finance Act 2003. He explained that a property is residential if it is used or suitable for use as a dwelling, or is being built or adapted for that use, together with land forming its garden or grounds.

He then focused on section 116(7), often called the six or more rule. In anonymised form, his explanation was:

Where six or more separate dwellings are acquired in a single transaction, the whole transaction is treated as non-residential for SDLT purposes.

He also noted that a transaction can reach the non-residential SDLT rates in a second way: if it includes at least one genuinely non-residential element, such as a shop or similar commercial unit, the whole transaction is treated as mixed-use.

Applying that reasoning to the two portfolios, Nick’s view was that both would qualify for non-residential treatment because:

• each portfolio contains well over six dwellings acquired in one transaction; and
• each also appears to contain at least one mixed-use property.

On those facts, the six or more dwellings rule alone would be enough, even without relying on the mixed-use elements.

The Law

The key provisions are in the Finance Act 2003.

Section 116 defines “residential property”. Broadly, it includes:

• a building used or suitable for use as a dwelling;
• a building in the process of being constructed or adapted for use as a dwelling; and
• land that is, or forms part of, the garden or grounds of such a building.

Property that does not fall within that definition is non-residential property.

Section 116(7) provides that where six or more dwellings are acquired in a single transaction, the transaction is treated as not being one for residential property. In practical terms, that means the non-residential SDLT rate structure applies.

Section 55 sets the rate rules. For non-residential or mixed-use transactions, the relevant rate table is Table B.

In broad terms, a transaction can therefore fall into the non-residential SDLT rates in either of these ways:

• the buyer acquires six or more dwellings in a single transaction; or
• the transaction includes both residential and non-residential property.

These are separate routes. If either route applies, the transaction is charged using the non-residential rate structure.

If the issue in another case is whether a building was not suitable for use as a dwelling at the effective date of transaction, the threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. Ordinary disrepair, dated condition or the need for works will often not be enough. The building generally has to fail the suitability test in a more fundamental way.

Analysis

Step 1 is to identify the transaction.

The six or more rule depends on how many dwellings are acquired in a single transaction. If an entire portfolio is bought under one contract, or otherwise forms one land transaction for SDLT purposes, the dwellings are counted together.

Step 2 is to count the dwellings.

On the facts described, each portfolio contains far more than six dwellings. That strongly points to section 116(7) applying. If so, the whole acquisition is treated as non-residential for SDLT purposes.

Step 3 is to check whether there is also any non-residential property.

One portfolio includes several mixed-use properties. The other includes a block with a shop and storage area. If those commercial elements are genuinely part of the subject matter being acquired, that gives a separate route to mixed-use treatment.

Step 4 is to consider the title structure.

The fact that some assets are leasehold, or that the seller holds a freehold title subject to a head lease, does not by itself prevent section 116(7) from applying. The critical question is what chargeable interests are being acquired and whether the transaction includes six or more dwellings. The underlying tenure can matter in detailed SDLT analysis, but on the facts given it does not appear to displace the main conclusion.

Step 5 is to ask whether restructuring is needed.

If the buyer is already acquiring six or more dwellings in a single transaction, there may be no need to split titles simply to reach non-residential rates. The statutory treatment may already be available without that extra work.

Step 6 is to avoid confusion between different SDLT concepts.

There is often overlap between:

• mixed-use treatment;
• the six or more dwellings rule; and
• multiple dwellings relief issues in older transactions.

They are not the same thing. In this scenario, the strongest point is not relief in the narrow sense, but the statutory rule that six or more dwellings in one transaction are treated as non-residential.

Step 7 is to be careful if the transaction is split into separate contracts.

If properties are divided across separate transactions, the buyer may lose the benefit of section 116(7) on any contract that contains fewer than six dwellings, unless another route to mixed-use treatment applies. So restructuring can help in some cases, but it can also create problems if done without a full SDLT review.

Outcome

On the facts described, both portfolio purchases would normally be expected to qualify for the non-residential SDLT rates.

• The first portfolio appears to qualify because it includes more than six dwellings in a single transaction, and also contains mixed-use properties.
• The second portfolio also appears to qualify because it includes more than six dwellings in a single transaction, and also contains a block with commercial space.

That means the buyer would not usually need to rely only on the presence of a shop or other commercial unit. The six or more dwellings rule should already do the work.

Practical Steps

Anyone assessing a portfolio purchase for SDLT should:

• identify exactly what is being acquired under each contract;
• count the number of separate dwellings being acquired in each transaction;
• check whether any part of the property is genuinely non-residential, such as a shop, office, yard or storage area not forming part of residential grounds;
• review the tenure and title structure, especially where freeholds, head leases and underleases overlap;
• make sure the SDLT analysis is based on the actual legal interests being transferred, not just estate agent descriptions;
• avoid assuming that title splitting will improve the SDLT result without modelling the effect first; and
• keep a clear schedule showing each unit, its use, and whether it is a dwelling for section 116 purposes.

If the issue is whether a property was uninhabitable rather than whether six or more dwellings are being bought, the condition evidence needs to be strong. Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the bar for showing that a building was not suitable for use as a dwelling is now relatively high.

Conclusion

Where a buyer acquires six or more dwellings in one transaction, section 116(7) of the Finance Act 2003 usually brings the whole purchase into the non-residential SDLT rates. In a large portfolio acquisition, that rule may apply even if the assets are mainly residential. If the portfolio also includes a genuine commercial element, that provides an additional mixed-use basis for the same result.

Legal References Used

• Finance Act 2003, section 55
• 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.

See all questions and answers categorized in this sitemap. Or use Google site search below.