There is a second set of stamp duty rates that most buyers never see, and they are dramatically cheaper than the residential ones. They top out at 5% instead of 12%, they ignore the second home surcharge entirely, and they ignore the non-resident surcharge too. On a large purchase the difference runs to tens of thousands of pounds.
Which is exactly why HMRC scrutinises claims to use them, and why a small industry of firms will cold-call you after completion offering to reclaim stamp duty you supposedly overpaid. This is a genuine part of the tax, and it is also the part most likely to land you in a compliance check. Here is how the classification actually works.
The non-residential and mixed-use rates
These rates apply in England and Northern Ireland to freehold purchases of non-residential property, and to any purchase that mixes residential and non-residential land.
| Portion of price | Rate |
|---|---|
| Up to £150,000 | 0% |
| £150,001 to £250,000 | 2% |
| Over £250,000 | 5% |
Three bands, and the top one is 5% however much you spend. Compare that with the residential table, where the same money passes through a 10% band above £925,000 and a 12% band above £1.5 million, and where an additional property adds 5 points to every band from the first pound.
What actually counts as mixed use
A transaction is mixed use when the land being bought consists of both residential and non-residential property. The classic examples are genuinely mixed:
- A shop, pub or restaurant with living accommodation above it
- A farmhouse bought together with working agricultural land
- A house sold with a separate commercial unit, workshop or let office on the title
- A property that includes land subject to a commercial grazing licence or a let paddock
- A building being bought partly as offices and partly as flats
The word doing the work is "non-residential". Garden and grounds are residential property, however large they are. A twelve-acre garden is still a garden. HMRC's published position is that land which forms part of the garden or grounds of a dwelling is residential, and that includes paddocks, orchards, woodland and outbuildings that a normal owner would treat as part of the property. To take it out of the residential category you generally need something more: a third party using the land commercially, a formal agreement, rent actually changing hands.
What the difference is worth
On a single main residence at ordinary prices, the mixed-use rates are barely cheaper and sometimes more expensive, because the residential table starts at zero up to £125,000 while a lot of mixed-use purchases pay 2% earlier. The gap opens up in two situations: large values, and additional properties.
| Purchase | As residential | As mixed use | Difference |
|---|---|---|---|
| £800,000, main residence | £30,000 | £29,500 | £500 |
| £800,000, additional property | £70,000 | £29,500 | £40,500 |
| £1,500,000, main residence | £93,750 | £64,500 | £29,250 |
The £800,000 mixed-use figure is 0% on the first £150,000, 2% on the next £100,000 (£2,000) and 5% on the remaining £550,000 (£27,500). The 5% and 2% surcharges do not apply to non-residential or mixed-use transactions at all, which is where almost all of the saving in the middle row comes from.
The six dwellings rule
There is one place where the residential category switches off automatically, with no argument about grazing licences. Section 116(7) of the Finance Act 2003 says that where six or more separate dwellings are bought in a single transaction, those dwellings "are treated as not being residential property" for stamp duty purposes.
Six flats in one block, bought together on one contract, are taxed at the non-residential rates. Five are not. It is a genuine cliff edge written into the legislation rather than an interpretation, and it is the reason portfolio purchases are so often structured as a single transaction.
Multiple dwellings relief has gone
If you are reading older guidance, you will find Multiple Dwellings Relief, which let you divide the price by the number of dwellings and apply the rates to the average. It was abolished for transactions completing or substantially performing on or after 1 June 2024, and it cannot be claimed now.
This matters because MDR is still the thing reclaim agents most often ring people about, usually on the theory that a granny annexe counted as a second dwelling. For any purchase completed since June 2024 there is nothing to claim. For older transactions the amendment window has largely closed too.
One geographical wrinkle: Wales did not follow. Land Transaction Tax kept its own version of multiple dwellings relief, though it has been narrowed more than once and now carries a minimum tax rule of 3% of the consideration. If you are reading about MDR in a Welsh context, it is a live relief there and a dead one here.
Leases: the second charge nobody expects
Buying a new non-residential lease is taxed twice over. You pay the rates above on the premium, and separately on the net present value of the rent across the life of the lease.
| Net present value of rent | Rate |
|---|---|
| Up to £150,000 | 0% |
| £150,001 to £5,000,000 | 1% |
| Over £5,000,000 | 2% |
On a long lease at a decent rent the NPV charge can easily exceed the charge on the premium. If you are taking a commercial lease and nobody has mentioned stamp duty, ask, because a return is still due even where the premium is nil.
Derelict property is usually still residential
A recurring claim is that a wreck cannot be residential because nobody could live in it. HMRC does not accept that as a general proposition. The residential test looks at whether a building is used or is suitable for use as a dwelling, or is being constructed or adapted for that use, and a house that needs rewiring, replastering and a new roof is normally still a house. The bar for saying a building has stopped being a dwelling is high: think structural collapse or a genuine change of use, not a bad survey.
This is another favourite of reclaim agents. It is worth remembering who carries the risk if the claim fails.
If someone offers to reclaim your Stamp Duty
Unsolicited approaches after completion are common, and the pitch is always the same: a no-win, no-fee claim that your purchase was really mixed use, or that an outbuilding was a second dwelling. Two things to hold on to.
First, the return is yours. If HMRC opens a check and the claim fails, you repay the tax with interest and possibly a penalty, and the agent's fee is not usually coming back. Second, a genuine mixed-use position is normally obvious at the time of purchase, and your conveyancer will have raised it, because it is on the face of the title and the contract. A claim that only becomes visible eighteen months later, after a phone call from someone who has never seen the property, deserves a very sceptical read.
If you think your purchase genuinely was mixed use, take the question to a solicitor or a chartered tax adviser who will put their name to the advice, and be ready to evidence the non-residential use as it stood on the day of completion.
Our stamp duty calculator works to the residential rates, which is what the overwhelming majority of purchases are taxed at. If your transaction is genuinely mixed use, the tables above are the ones to work from, and the figure should be agreed with your conveyancer before the return is filed rather than argued about afterwards.