Understanding SDLT Relief for Multiple Dwellings: Example with 20 Flats Purchase

Multiple Dwellings Relief on Buying a Freehold Block of Flats

Multiple dwellings relief (MDR) can apply when a buyer purchases the freehold of a block containing several flats, because SDLT looks at the transaction as acquiring multiple dwellings rather than one single property. The tax is worked out by averaging the total price across the flats, but MDR does not remove SDLT altogether because a minimum tax charge applies, and the higher rates for additional dwellings and the non-resident surcharge may still increase the final bill.

• A freehold purchase of a block of flats can count as the acquisition of multiple dwellings for MDR purposes, even if there is only one title.
• MDR is usually calculated by dividing the total price by the number of dwellings, calculating SDLT on that average figure, and then applying the MDR rules.
• Even if the average price per flat falls below the normal SDLT nil-rate threshold, MDR has a minimum tax rule so SDLT may still be payable.
• The higher rates for additional dwellings will often apply to bulk purchases of flats and can be added on top of MDR.
• If the buyer is non-UK resident, a further SDLT surcharge may also apply, depending on the effective date of the transaction.
• In practice, buyers must also check that all units are dwellings, that the detailed MDR conditions are met, and that the tenure structure does not affect the result.

Scroll down for the full analysis.

Multiple dwellings relief: buying a freehold block of flats

This page explains how multiple dwellings relief (MDR) can apply where someone buys the freehold of a block containing several flats. The HMRC example deals with a new block of 20 flats bought for a single price. The important point is that, for MDR purposes, the purchase is treated by reference to the individual dwellings rather than as one single asset. That can change how SDLT is calculated, but it does not remove the need to consider the higher rates for additional dwellings or, where relevant, the non-resident surcharge.

What this rule is about

MDR is a relief within SDLT for transactions involving more than one dwelling. Its purpose is to avoid a single bulk purchase being taxed too heavily simply because the total price is high, where that price is really spread across several homes.

In the HMRC example, the buyer acquires the freehold of a new block of 20 flats for £2.5 million. There is no headlease and none of the flats is subject to a long lease. That matters because the transaction is treated as involving the acquisition of 20 dwellings.

The basic MDR method is to divide the total chargeable consideration by the number of dwellings, work out the SDLT on that average amount, and then multiply back up. But MDR has its own minimum tax rule, so the result is not always nil even if the average price per dwelling falls within the ordinary 0% band.

What the official source says

HMRC’s example says this purchase is a relevant transaction for MDR because it involves the acquisition of more than one dwelling, namely the 20 flats.

For MDR purposes, the freehold is treated as if it were interests in the individual dwellings. On the figures given, £2.5 million divided by 20 gives an average consideration of £125,000 per dwelling.

HMRC notes that this average figure is below the normal 0% SDLT threshold. Even so, a minimum rate of tax applies under MDR.

HMRC also says that if the other conditions for MDR are met, the relief can be claimed. However, in almost all cases of this kind, the higher rates for additional dwellings will apply. For transactions with an effective date on or after 1 April 2016, those higher rates add 3% to the standard SDLT rates.

HMRC further notes that if the purchaser is non-UK resident, the non-resident SDLT rates may also apply. For transactions with an effective date on or after 1 April 2021, that adds a further 2% to the standard rates or to the higher rates for additional dwellings, if those already apply.

What this means in practice

The practical message is that buying a whole block of flats can still qualify for MDR even though the buyer is acquiring one freehold title rather than 20 separate leasehold interests.

The law looks at the substance of what is being acquired: multiple dwellings. So the SDLT calculation is adjusted to reflect that the price relates to many homes, not one very expensive property.

However, buyers should not assume that a low average price per flat means no SDLT is payable. HMRC’s example specifically points out that MDR has a minimum tax charge. So even where the average consideration per dwelling is below the ordinary nil-rate threshold, the relief does not reduce the tax to nothing.

It is also important not to stop the analysis at MDR. A bulk purchase of flats will often fall within the higher rates for additional dwellings. If it does, the SDLT rate used in the MDR calculation is increased accordingly. If the buyer is non-UK resident, there may be a further surcharge on top.

How to analyse it

A sensible way to analyse a purchase like this is:

• First, identify whether the transaction involves more than one dwelling.
• Then ask what exactly is being acquired. A single freehold can still amount to an acquisition of multiple dwellings.
• Check whether the conditions for MDR are otherwise met. HMRC’s example assumes they are, but does not set them out in full.
• Work out the total chargeable consideration and divide it by the number of dwellings.
• Apply the SDLT rates to that average amount, then multiply in line with the MDR rules.
• Do not forget the MDR minimum tax rule.
• Separately consider whether the higher rates for additional dwellings apply.
• If the purchaser is non-UK resident, consider whether the non-resident surcharge also applies.
• Make sure the effective date is checked, because the surcharges only apply from their respective commencement dates.

In other words, MDR is only one part of the SDLT calculation. It may reduce the tax compared with taxing the whole price as one acquisition, but surcharges can still significantly affect the final amount.

Example

Illustration based on HMRC’s example: a buyer purchases the freehold of a newly built block containing 20 flats for £2.5 million. There is no headlease and no flat is subject to a long lease.

Because the transaction involves 20 dwellings, it can be a relevant transaction for MDR. The average consideration per dwelling is £125,000.

That average figure is below the normal 0% SDLT threshold, but the tax is not automatically nil. MDR has a minimum rate of tax. If the higher rates for additional dwellings apply, those rates must also be taken into account. If the buyer is non-UK resident, there may be an additional 2% surcharge as well.

The result is that MDR may still be valuable, but the final SDLT bill can remain substantial.

Why this can be difficult in practice

The HMRC example is short and assumes several points rather than proving them. In real transactions, difficulty often arises over whether all the units are in fact dwellings, whether the detailed conditions for MDR are met, and whether any surcharge applies.

The interaction between MDR and the higher rates can also be misunderstood. Some readers assume MDR and the higher rates are alternatives. They are not necessarily. HMRC’s example makes clear that both can apply to the same transaction.

Another practical difficulty is that the example concerns a new block with no headlease and no long leases. Different tenure arrangements may require closer analysis. The tax result may depend on exactly what interests exist and what is being acquired.

The non-resident surcharge adds another layer. It is not enough to identify multiple dwellings and claim MDR. Residence status must also be checked where relevant.

Key takeaways

• A purchase of the freehold of a block of flats can qualify as acquiring multiple dwellings for MDR purposes.
• MDR works by reference to the average consideration per dwelling, but a minimum SDLT charge still applies.
• The higher rates for additional dwellings, and possibly the non-resident surcharge, may still apply on top of MDR.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Understanding SDLT Relief for Multiple Dwellings: Example with 20 Flats Purchase

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