SDLT Refunds on Uninhabitable Property: Where the Line Actually Sits

A property that isn't a "dwelling" on the day you buy it is taxed at non-residential SDLT rates — no 3% or 5% surcharge, no residential bands, and a much smaller bill. A cottage industry has grown up around reclaiming SDLT on this basis, and it made genuine money for buyers of truly derelict property in the years after P N Bewley. But two Upper Tribunal decisions since have narrowed the test hard, and HMRC now actively challenges these claims. Understanding where the line sits today matters more than the headline case that started it.

Why "dwelling" status decides the rate

SDLT charges residential rates, plus the additional dwellings surcharge where it applies, on the purchase of a "dwelling". If what you're buying is not suitable for use as a dwelling at the effective date of the transaction — normally completion — the purchase is taxed as non-residential or mixed-use property instead, at materially lower rates and with no surcharge at all. On a property in the hundreds of thousands, that difference can run to tens of thousands of pounds, which is exactly why the question gets fought over.

The test looks at the physical condition of the building on the day of completion, not its intended future use, not what the seller was using it for, and not what it will become once you've finished the works.

P N Bewley: the case that started the trend

In P N Bewley Ltd v HMRC (2019), the First-tier Tribunal accepted that a bungalow bought for demolition and redevelopment was not suitable for use as a dwelling at completion. The property had asbestos throughout, the heating system and much of the pipework had been removed, and it was in such poor condition that the buyer's own intention was to knock it down. The Tribunal agreed the property fell outside the definition of a dwelling, and the purchase was taxed at non-residential rates.

The decision was widely reported, and a wave of SDLT refund claims followed on the strength of it — often for properties that were simply tired, outdated or in need of a full refurbishment, rather than genuinely uninhabitable in the way the Bewley bungalow was.

Fiander and Brower: the Upper Tribunal pushes back

In Fiander and Brower v HMRC (2021), the Upper Tribunal overturned a First-tier Tribunal decision that had found a house with a collapsed and unsafe swimming pool structure in the garden was not a dwelling because of the danger the pool posed. The Upper Tribunal held that the test is about the physical state of the building itself, not hazards elsewhere on the site, and that "suitable for use as a dwelling" sets a materially higher bar than "in need of repair" or "in need of modernisation" — the property has to be genuinely unfit for human habitation because of its physical state, not merely unattractive or in poor order.

Mudan: the bar gets higher still

In Mudan v HMRC (2024), the Upper Tribunal considered a property with no working kitchen, damp, and safety concerns serious enough that the buyers did not move in immediately. The Tribunal confirmed it was still a dwelling. The reasoning is the point that matters most for anyone weighing up a claim today: a property that needs significant renovation, even where it lacks basic functioning facilities, remains a dwelling if it is capable of being restored to habitable condition by repair and refurbishment, rather than needing to be substantially rebuilt or reconstructed. The question isn't whether you'd want to sleep there the night you completed — it's whether the building's fabric and structure are sound enough that ordinary building work, however extensive, gets it back to habitable.

Taken together, Fiander, Brower and Mudan mean the post-Bewley wave of refund claims mostly no longer succeeds. A kitchen that's ripped out, a bathroom that doesn't work, damp, an outdated electrical system, or even a partially collapsed roof over one room, are very unlikely on their own to take a property outside the definition of a dwelling.

What still genuinely qualifies

The cases that succeed post-Mudan tend to share several features together, not just one:

• Structural defects serious enough that the building is unsafe to enter, not merely unpleasant to live in.
• No practical, cost-effective route back to habitability without substantial reconstruction — effectively closer to a rebuild than a refurbishment.
• Independent evidence from a structural engineer or surveyor, obtained close to the effective date, documenting the condition and the basis for concluding it is unsafe or unfit.
• Corroborating evidence: a dangerous structure notice from the local authority, photographs taken at or near completion, and (where relevant) the seller's own record of the property being uninhabited and unmortgageable in its existing condition.

A property riddled with genuine structural failure — subsidence beyond repair, fire damage leaving only a shell, a roof that has fully collapsed — is a realistic candidate. A property that's simply outdated, needs a full internal refit, or has an expired gas safety certificate, is not.

HMRC's crackdown on speculative claims

HMRC has become far more assertive in challenging uninhabitable-dwelling SDLT claims since Fiander and Mudan, and specifically targets claims that were submitted by firms marketing "SDLT reclaim" services on a contingency-fee basis with no proper evidential basis. Where HMRC opens an enquiry into a claim and concludes it fails, the buyer is liable for the SDLT that should have been paid at the residential rate, plus interest, and potentially a penalty if the original claim was careless or worse. The buyer bears that risk, not the firm that submitted the claim on their behalf — a detail some of these firms are not upfront about. See our guide on HMRC enquiries into property tax returns for how that process runs once it starts.

Making a genuine claim: process and time limits

Where a property genuinely was not a dwelling at completion, the correct residential vs non-residential treatment should be reflected in the SDLT return filed within 14 days of completion in the first place. Where residential rates were paid in error, a claim to amend the return and recover the overpaid tax can generally be made within 12 months of the filing deadline — in practice, close to 12 months and 14 days from the effective date. Claims made after that window has closed are normally out of time, regardless of the merits.

Common questions

Can I get an SDLT refund if the property I bought was uninhabitable?

Only if the property was genuinely not suitable for use as a dwelling on the day the purchase completed. That is a high threshold: severe structural defects, no safe means of entry, or hazards combined with no functioning services. A property that simply needs modernising, rewiring or a new kitchen and bathroom is still a dwelling, even if unpleasant to live in as it stands.

What was decided in P N Bewley Ltd v HMRC?

The First-tier Tribunal held that a bungalow due for demolition, with asbestos throughout and no working heating system, was not suitable for use as a dwelling at completion, so the purchase was taxed at non-residential rates. The case is widely cited but has since been narrowed considerably by later Upper Tribunal decisions.

Did Mudan v HMRC make it harder to claim non-residential SDLT rates?

Yes. The Upper Tribunal confirmed that a property requiring significant renovation, including no working kitchen and safety issues, was still a dwelling because it was capable of being restored to habitable condition through repair rather than needing to be rebuilt.

How long do I have to claim an SDLT refund after completion?

Generally within 12 months of the SDLT filing deadline, which is 14 days after completion — so in practice within roughly 12 months and 14 days of the transaction. Claims made outside this window are usually out of time.

This article is general information, not personal tax advice, and tax rules change. Your own position depends on facts we cannot see from here — please take advice before acting on anything above.

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