If you’re buying a run-down property, don’t assume that disrepair alone means you’ll avoid Stamp Duty Land Tax (SDLT). HMRC’s rules on what actually counts as “uninhabitable” are narrower, and more precisely tested, than many buyers expect.
TL;DR
A property doesn’t become exempt from residential SDLT just because it needs rewiring, a new kitchen or bathroom, or repairs to damp, pests or a leaking roof. HMRC, and the courts, only accept a non-residential claim where a building has genuinely lost its fundamental character as a dwelling. For example, through serious structural danger, asbestos that can’t safely be removed, or a local authority prohibition notice.
If you’re not sure where your purchase falls, get advice before you complete. Amending a return after the event, or relying on a repayment agent’s claim, is far riskier than getting the classification right from the outset.
Why So Many Buyers Get This Wrong
When a property has fallen into disrepair, it’s easy to assume the sale will qualify for the lower, non-residential rate of SDLT. HMRC has reported that a very high proportion of the SDLT repayment claims it receives in this area are incorrect. They have warned buyers to be cautious about being misled by repayment agents into submitting claims that don’t stand up to scrutiny.
Whether a property has deteriorated to the point where it’s no longer considered a “dwelling” is a question of fact, and HMRC is clear that it applies to only a small number of buildings. If a property was previously used as a dwelling, it generally keeps the potential to be used as one again, provided there’s no significant structural issue or other barrier preventing that.
What HMRC Means by a “Dwelling”
HMRC defines a dwelling as “a building, or a part of a building, that affords those who use it the facilities required for day-to-day private domestic existence and a sufficient degree of permanence.” This includes buildings under construction that are being built or adapted for use as a dwelling.
Crucially, a property doesn’t need to be immediately ready for occupation at completion to be “suitable for use as a dwelling.” That single point trips up a lot of otherwise well-intentioned SDLT claims.
“Needs Modernising” vs Uninhabitable
HMRC draws a clear line between a derelict property and a dwelling that needs modernisation, renovation or repair. Only a limited number of properties fall on the derelict side of that line.
| Will not usually make a property “unsuitable” for use as a dwelling | May indicate a property is not “suitable” for use as a dwelling |
|---|---|
| Temporary removal of bathroom or kitchen facilities before sale | Asbestos present in quantities that can’t be safely removed without deconstructing the building |
| Substantial repairs needed to windows, floors or the roof | High levels of radioactive contamination |
| A replacement boiler and pipework | A high probability of walls or other structural elements collapsing |
| Unsafe electrical wiring | Hazards serious enough that a local authority has issued, or would issue, a prohibition notice restricting use of the premises |
| Services (gas, electric, water) switched off and needing reconnection | |
| An infestation of pests | |
| Damp-proofing required, or plasterboard damage | |
| Flood damage | |
| Structural defects that are capable of being repaired or rectified |
HMRC treats the left-hand list as common, fixable issues that don’t change the building’s fundamental character as a dwelling. Regardless of how unpleasant they make it to live in right now.
HMRC’s guidance also talks in terms of essential amenities, for example, a functional bathroom, kitchen and heating, as a marker of inhabitability. But this isn’t a standalone checklist.
A missing or non-working kitchen or bathroom is the kind of thing the table above already treats as fixable disrepair, not proof of unsuitability, and the case law below confirms it. In the case of Mudan vs HMRC, the kitchen was unusable because of vermin, and the property was still held to be residential once weighed against everything else.
Treat “lacks essential amenities” as one factor to weigh alongside the others below, not a trigger on its own. A property that needs updating and redecorating can still be perfectly liveable, even as a renovation project. An unfurnished, unoccupied property that’s otherwise liveable is unlikely to qualify unless substantial renovation is needed.
The “brochure test”: one practical way to gauge how a property’s condition will be viewed is to look at how it was marketed. Was it described as “in need of renovation and modernisation,” or as “uninhabitable” or “derelict”?
Selling agents’ own wording is often used as evidence on both sides of an SDLT dispute.
The Case Law: Two Decisions Every Buyer Should Know
Two cases now frame how this test is applied in practice. It’s worth understanding both, because the more recent one narrows the earlier one rather than replacing it.
P N Bewley Ltd v HMRC [2019] UKFTT 65 (TC)
The company bought a derelict bungalow that had asbestos in the roof, no working heating, and had been stripped of pipework, and was due to be demolished and replaced.
The property couldn’t be mortgaged in its existing state. The First-tier Tribunal found it was not “suitable for use as a dwelling” at completion, qualifying for non-residential SDLT rates instead.
Bewley established the key principle that suitability is tested at the effective date of the transaction, not by reference to what the building could theoretically become.
Mudan v HMRC [2025] EWCA Civ 799 (Court of Appeal, 3 July 2025)
Mr and Mrs Mudan bought a house in London that needed complete rewiring, a new boiler and pipework, had a leaking cellar, broken windows and doors, and a kitchen unusable due to vermin.
Structurally, though, the property was sound and had been mortgageable. They paid SDLT at the residential rate, then sought a partial repayment on the basis the property was non-residential.
The Court of Appeal disagreed, upholding HMRC’s view that the house was residential throughout.
The judgment matters because it sets out the clearest framework yet for applying the test. Lord Justice Lewison identified five principles:
- Where a building has previously been used as a dwelling, that’s a highly relevant factor in favour of it remaining one.
- The focus should be on the building’s fundamental characteristics over a period of time, not a snapshot of habitability at the completion date. Suitable for use does not mean ready for immediate occupation.
- Disrepair that can be cured isn’t enough on its own to change the property’s classification. The works needed should be assessed cumulatively, not issue by issue.
- Works needed to make a building habitable must be distinguished from works needed to make it pleasant to live in. Defects must be fixable. If putting them right would be dangerous, or would damage the building’s structure, that’s the Bewley asbestos threshold, applied more broadly.
- Immediate occupancy risk like dangerous wiring, for example, is relevant context, but doesn’t by itself determine whether a property is unsuitable for use as a dwelling.
Read together, Bewley and Mudan tell buyers the same thing from two directions: a genuinely derelict property (Bewley) will qualify; a rundown-but-fundamentally-sound one (Mudan), however unpleasant to live in on day one, will not.
What’s Actually at Stake: Residential vs Non-Residential Rates
Getting the classification right (or wrong) has a real financial consequence, which is exactly why HMRC scrutinises these claims so closely.
Residential SDLT rates (England & Northern Ireland)
| Property value | Rate |
|---|---|
| Up to £125,000 | 0% |
| £125,001 – £250,000 | 2% |
| £250,001 – £925,000 | 5% |
| £925,001 – £1.5 million | 10% |
| Above £1.5 million | 12% |
A 5% surcharge applies on top of these rates when buying an additional residential property, and first-time buyer relief can remove or reduce the charge on purchases up to £500,000. Neither of which applies once a property is classified as non-residential.
Non-residential and mixed-use SDLT rates
| Property value | Rate |
|---|---|
| Up to £150,000 | 0% |
| £150,001 – £250,000 | 2% |
| Above £250,000 | 5% |
Rates shown are correct as of September 2026 and can change at future Budgets or Finance Acts. Always check the current bands on gov.uk before relying on them for a live transaction.
Evidencing a Claim
If a property genuinely meets the derelict threshold, HMRC will still expect evidence gathered at, or close to, the point of completion. Not reconstructed after the fact. Useful evidence includes:
- A structural engineer’s or chartered surveyor’s report describing the property’s actual condition at completion. Not a general homebuyer’s report written on the assumption the property is habitable.
- Dated photographs taken as close to the completion date as possible.
- Evidence the property couldn’t be mortgaged in its existing state, such as a lender’s valuation refusal.
- Any local authority correspondence or notices. A prohibition order or dangerous structure notice carries real weight.
- The selling agent’s own marketing description.
- A clear record of what has changed since the property was last occupied, where previous residential use is in question.
Time Limits and the Cost of Getting It Wrong
An SDLT return can normally be amended within 12 months of the filing date. Where that window has passed, a claim for overpayment relief can still be made, but only within four years of the effective date of the transaction (source: HMRC’s Stamp Duty Land Tax Manual, SDLTM54000). After that, the right to reclaim is generally lost.
Misjudging the classification carries a real cost.
If HMRC opens a compliance check and disagrees with a non-residential claim, the buyer can face repayment of the shortfall, interest, and potentially penalties on top. Buyers approached by repayment agents offering to “assess” a property for a share of any refund should treat that offer with caution. HMRC’s own warning about incorrect claims in this area exists precisely because of firms pursuing speculative claims on commission.
Talk to Us Before You Complete
If you’re buying a property in poor condition and you’re not sure how it should be classified for SDLT, it’s far better to raise it with your conveyancing solicitor before completion than to rely on a repayment claim afterwards.
Our residential conveyancing team acts for buyers across the UK and can guide you through the legal aspects of your purchase. Visit our Residential Conveyancing pages to find your nearest office. If you are buying a derelict property for commercial development, our Commercial Property team can advise on the transaction. For advice on any tax implications of your purchase, we recommend speaking to a qualified tax adviser.