SDLT Higher Rates: Condition C – Ownership of Additional Property Valued Over £40,

When owning another dwelling meets SDLT higher rates Condition C

Condition C for the higher rates of Stamp Duty Land Tax looks at whether an individual buyer owns, or is treated as owning, another dwelling interest worth at least £40,000 at the end of the effective date of the purchase. This test can bring a transaction within the higher rates regime, but only if the other statutory conditions are also met.

• The other property can be anywhere in the world and must be another dwelling, not the one being bought.
• The buyer must hold a major interest, usually a freehold or a lease originally granted for more than seven years.
• The relevant value is the market value of the buyer’s own interest, including any share owned, and it must be at least £40,000.
• Mortgages and other secured loans are ignored when working out that value.
• Certain reversionary interests are excluded, including one on a lease with more than 21 years left to run.
• Valuation and deemed ownership can be difficult in practice, especially for partial shares, inherited interests and unusual leasehold arrangements.

Scroll down for the full analysis.

SDLT higher rates: when owning another dwelling triggers Condition C

This page explains one of the key tests for the higher rates of Stamp Duty Land Tax on additional dwellings. The question is whether, at the end of the effective date of the purchase, the buyer owns or is treated as owning another dwelling worth at least £40,000. This matters because if Condition C is met, it may help bring the purchase within the higher rates regime, depending on the other conditions.

What this rule is about

The higher rates for additional dwellings do not apply simply because someone is buying a home. They apply only if a set of statutory conditions is met. Condition C looks at the buyer’s property position at the end of the day of the transaction.

In broad terms, Condition C asks whether the individual buyer already has another sufficiently valuable interest in a dwelling anywhere in the world. The rule is aimed at identifying buyers who already have a meaningful residential property interest, rather than people whose only other connection to property is too small or too remote.

What the official source says

HMRC’s manual says that Condition C is met if, at the end of the effective date of the transaction, the individual purchaser owns, or is treated as owning, a major interest in another dwelling anywhere in the world.

For this purpose:

• the interest must be in another dwelling
• the interest must be a major interest
• that interest must have a market value of at least £40,000
• the interest must not be a reversionary interest on a lease with more than 21 years left to run

The manual also explains what counts as a major interest. A freehold interest counts. A leasehold interest can also count, but only if the lease was originally granted for a term of more than seven years.

The £40,000 test is based on the market value of the interest that the buyer owns, or is treated as owning, in the dwelling. Secured borrowing is ignored. So if there is a mortgage on the property, that does not reduce the value for this test.

When valuing the dwelling interest, the relevant land includes not just the building itself, but also the garden or grounds, buildings and structures within them, and any other land that exists for the benefit of the dwelling.

What this means in practice

Condition C is not asking whether the buyer owns a whole property outright. A share in another dwelling can be enough, but only if the buyer’s own interest is worth at least £40,000.

This is important for people who own property jointly, have inherited part of a dwelling, or hold a lease rather than a freehold.

Three practical points often matter:

• The timing is strict. The test is applied at the end of the effective date of the purchase.
• The location does not matter. A dwelling outside the UK can still count.
• The value looked at is the value of the buyer’s interest, not the gross value of the whole property unless the buyer owns all of it.

The rule can therefore catch someone who owns a sufficiently valuable share in a second property, but it can also exclude someone whose share is too small to reach £40,000.

The mortgage position does not help reduce the value. If a buyer owns a half share worth £60,000 but there is heavy borrowing on the property, the value for this test is still based on the market value of that half share, not the equity after debt.

How to analyse it

A sensible way to approach Condition C is to ask these questions in order:

• Is the buyer an individual? Condition C, as described here, is framed by reference to an individual purchaser.
• At the end of the effective date, does the buyer own or is the buyer treated as owning an interest in another dwelling?
• Is that interest a major interest? In practice, this usually means a freehold, or a lease originally granted for more than seven years.
• Is the interest excluded because it is reversionary on a lease with more than 21 years left?
• What is the market value of the buyer’s own interest in that dwelling at that date?
• Does that value reach at least £40,000, ignoring any mortgage or other loan secured on the property?
• What land should be included in the valuation? The dwelling, its garden or grounds, and other land held for its benefit should be taken into account.

This analysis only answers Condition C. The higher rates position overall still depends on the other statutory conditions being met or not met.

Example

Suppose a buyer owns one fifth of a buy-to-let flat with several relatives. The whole flat is worth £150,000, and the buyer’s share is worth £30,000. The buyer now purchases a home to live in.

On the HMRC view set out in the manual, Condition C is not met because the buyer’s interest in the other dwelling is worth less than £40,000. On these facts, that particular condition for the higher rates is not satisfied.

Why this can be difficult in practice

The main difficulty is often valuation. The legislation and manual require the market value of the interest actually owned, or treated as owned, by the buyer. That can be straightforward for a full freehold, but less so for a partial share, an unusual leasehold interest, or a property with features that affect value.

Another difficulty is working out what the buyer is treated as owning. The manual states that deemed ownership can count, but this page does not set out the full deemed ownership rules. In practice, that means Condition C cannot always be answered by looking only at legal title.

There can also be uncertainty over whether an interest is reversionary, and whether a leasehold interest qualifies as a major interest if the original lease term and current remaining term are different. The source material makes clear that the original grant must have been for more than seven years, while separately excluding certain reversionary interests where more than 21 years remain on the lease.

Finally, readers sometimes focus on net equity after mortgage. That is not the test here. The source is clear that loans are ignored when calculating market value.

Key takeaways

• Condition C looks at whether the buyer owns, or is treated as owning, another dwelling interest worth at least £40,000 at the end of the effective date.
• A share in another dwelling can count, but the value tested is the value of the buyer’s own interest, not simply the value of the whole property.
• Mortgages are ignored for this purpose, and property anywhere in the world can be relevant.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: SDLT Higher Rates: Condition C – Ownership of Additional Property Valued Over £40,

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