Relief for Multiple Dwellings: Superior Interests and Transitional Rules Explained

Multiple dwellings relief and superior interests in blocks of flats

Under the former SDLT multiple dwellings relief rules, buying a freehold or headlease of a block of flats could count as acquiring interests in the flats themselves, but flats already subject to long leases were usually ignored. Although the relief has been abolished for most transactions completing or substantially performed on or after 1 June 2024, this rule still matters for earlier transactions and some transitional cases.

• A superior interest, such as a freehold or headlease, can be treated as an interest in the dwellings within a building when deciding if the transaction involved multiple dwellings.
• Flats already let on leases originally granted for more than 21 years are generally excluded from the count.
• If at least two dwellings remain countable after that exclusion, the transaction may qualify as a relevant transaction for the former relief rules.
• If only one dwelling can be counted, the transaction is not a relevant transaction for this purpose, so the relief is not available.
• The analysis depends on careful title checking, including the type of interest bought and the original term of any existing leases.
• There is a narrow exception for certain shared ownership lease and leaseback arrangements, and timing is critical because the relief no longer applies to most transactions from 1 June 2024.

Scroll down for the full analysis.

Multiple dwellings relief and superior interests in blocks of flats

This page explains an old multiple dwellings relief rule about buying a superior interest, such as a freehold or headlease, in property containing dwellings. The point matters because, under the former relief, you first had to decide whether the transaction counted as one involving multiple dwellings at all. This rule affected whether flats subject to long leases could be counted. Although multiple dwellings relief has now been abolished for most transactions completing, or substantially performed, on or after 1 June 2024, the rule can still matter for earlier transactions and for cases within the transitional rules.

What this rule is about

Under the former multiple dwellings relief rules, a buyer could in some cases calculate SDLT by reference to the number of dwellings acquired. But that depended on the transaction being a “relevant transaction” involving an interest in at least two dwellings.

This page deals with a specific issue: what if the buyer does not acquire the individual flats directly, but instead acquires a superior interest over a building, such as the freehold of a block or a headlease? The legislation treats that superior interest as if it were an interest in the dwellings in the building, but only up to a point. Dwellings already let on long leases are generally excluded from the count.

What the official source says

HMRC’s manual says that, when deciding whether a transaction is a relevant transaction for multiple dwellings relief purposes, a superior interest over property that includes dwellings is treated as an interest in those dwellings.

In practical terms, that means the freehold or headlease of a block of flats can potentially be treated as an acquisition of interests in the flats themselves.

But there is an important limit. A superior interest cannot be counted to the extent that it is superior to a lease of a dwelling granted for an initial term of more than 21 years. So, if some flats in the block are already held on long leases, those flats are generally left out when deciding whether the acquisition involves multiple dwellings.

The manual gives these illustrations:

• If a buyer acquires the freehold of a new block of four untenanted flats, the transaction is a relevant transaction.
• If a buyer acquires the freehold of a block of four flats and two are held on long leases, the transaction is still a relevant transaction, but only two dwellings count: the two flats not subject to long leases.
• If three of the four flats are held on long leases, the transaction is not a relevant transaction, because only one dwelling can be counted.

The source also notes a special exception for certain shared ownership lease and leaseback arrangements. For transactions with an effective date on or after 26 March 2015, paragraph 2(6) is disapplied where the chargeable interest acquired is a leasehold interest acquired from a qualifying body under a lease and leaseback arrangement for shared ownership properties falling within FA 2003 section 57A, provided the statutory conditions are met.

What this means in practice

The key practical question is not simply “does the building contain several flats?” It is “how many of those flats can actually be counted for the relief rules?”

If you buy the freehold of a block, you might think you have acquired all the flats in the building. For this rule, that is only partly true. Flats already granted away on long leases are generally ignored when working out whether the transaction involves multiple dwellings.

This can make a decisive difference:

• If at least two dwellings can be counted, the transaction may fall within the former multiple dwellings relief regime, assuming the other conditions are met.
• If only one dwelling can be counted, the transaction is not a relevant transaction for this purpose, so the relief is not available.

In other words, the legal form of the interest acquired matters, but so does the occupational and title structure underneath it.

How to analyse it

A sensible way to approach this issue is as follows.

1. Check whether multiple dwellings relief is potentially in point at all. Because the relief was abolished for transactions completing, or substantially performed, on or after 1 June 2024, first confirm whether the transaction is earlier than that or falls within a transitional rule.
2. Identify the chargeable interest acquired. Is the buyer acquiring a freehold, a headlease, or another superior interest rather than direct leases of the flats?
3. Identify the dwellings within the property. Work out which parts of the property are dwellings for SDLT purposes.
4. Check whether any of those dwellings are already subject to leases granted for an initial term of more than 21 years. Those dwellings are generally excluded when counting how many dwellings the superior interest covers for this rule.
5. Count only the dwellings that remain after that exclusion. If fewer than two dwellings can be counted, the transaction is not a relevant transaction for these purposes.
6. Consider whether the shared ownership lease and leaseback exception applies. This is a specific statutory carve-out and only applies where the conditions mentioned in the source are met.

This is a threshold exercise. It is about whether the transaction qualifies as one involving multiple dwellings for the relief rules, not about every other condition for claiming relief.

Example

Illustration: a buyer acquires the freehold of a building containing five flats. Two flats are vacant. One is let on a short tenancy. Two are held on leases originally granted for 99 years.

For this rule, the two flats held on 99-year leases are generally left out of account. The superior interest can still be treated as an interest in the other three dwellings. Because at least two dwellings can be counted, the transaction may be a relevant transaction for the former multiple dwellings relief rules, assuming the other requirements are satisfied.

If, instead, four of the five flats were already held on long leases, only one flat would remain countable. In that case, the transaction would not be a relevant transaction for this purpose.

Why this can be difficult in practice

The difficulty is usually factual rather than conceptual. You need to know exactly what interests already exist in each dwelling and the initial term of each lease.

Several points can cause problems:

• The rule looks at whether the superior interest is “in relation to” a lease over a dwelling granted for an initial term of more than 21 years. That requires accurate title review.
• It is not enough to know that a flat is occupied by someone else. The critical issue is the legal nature and original term of the lease.
• A building may contain a mix of vacant units, short lets, and long-lease flats. Each dwelling needs to be classified correctly.
• The shared ownership exception is narrow and depends on the arrangement falling within the statutory provisions mentioned by HMRC. It should not be assumed to apply simply because the property is a shared ownership property.
• Because the relief itself has been abolished for most later transactions, timing is now crucial. An otherwise valid analysis may be irrelevant if the effective date is on or after 1 June 2024 and no transitional rule applies.

Key takeaways

• Under the former multiple dwellings relief rules, buying a freehold or headlease of a block could count as acquiring interests in the dwellings within it.
• Dwellings already subject to leases granted for an initial term of more than 21 years are generally excluded when counting how many dwellings the superior interest covers.
• This counting exercise can determine whether the transaction is a relevant transaction at all, which is the gateway to the former relief.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Relief for Multiple Dwellings: Superior Interests and Transitional Rules Explained

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