How to Claim a Stamp Duty Refund for an Uninhabitable Property (SDLT)

If you bought a genuinely derelict property and paid standard residential rates, you may be able to claim a Stamp Duty refund for an uninhabitable property by having the transaction reclassified as non-residential under section 116 of the Finance Act 2003. The refund is the gap between the residential SDLT you paid and the lower non-residential rates that should have applied. On higher-value purchases, and especially where the additional dwellings surcharge was charged, the sum can be substantial. The catch is that HMRC’s bar for “not suitable for use as a dwelling” sits far higher than most buyers expect, and weak claims fail.

This applies to purchases in England and Northern Ireland only. Scotland’s Land and Buildings Transaction Tax and Wales’s Land Transaction Tax are separate regimes with their own rules and claim routes.

Does Your Property Actually Qualify?

Section 116 of the Finance Act 2003 splits property into residential and non-residential. A building is residential if it is “used or suitable for use as a dwelling.”¹ If it fails that test on the effective date of your transaction (usually completion day), non-residential rates apply and you were overcharged.

Two points about the test trip people up. First, HMRC assesses the property in the state it was in on completion day, not the state you plan to leave it in. Your renovation plans, planning permission, and intentions do not enter into it. Second, “suitable for use as a dwelling” is not the same as “ready to move into tomorrow.” Plenty of properties need work before anyone lives in them, and needing work is not the same as failing the test.

The 2025 Court of Appeal decision in Mudan v HMRC set out the framework HMRC now applies. You ask whether the building was previously used as a dwelling (if yes, that is a strong indicator it still is one), whether it retains the fundamental characteristics of a dwelling, and whether the defects genuinely stop it being a dwelling rather than simply making it an unpleasant place to live. The overarching question is what an ordinary English speaker would call the property.²

What HMRC Says Does Not Count

HMRC’s internal guidance is blunt: “only a very limited number of properties will genuinely fall under the category of being not suitable for use as a dwelling.”² The following defects, even when several appear together, do not on their own change the classification:

Kitchens or bathrooms stripped out before sale
Major structural repairs — windows, floors, doors, roofs
Heating and plumbing needing replacement, including a new boiler
Unsafe electrical wiring
Pest infestation, damp, or damaged plasterboard
Flood damage
Asbestos, if its presence is the only issue
Structural defects that can be repaired or rectified

That list surprises most buyers. A house with no boiler, crumbling plaster, asbestos in the ceiling, and a rat problem sounds uninhabitable in ordinary language, but under HMRC’s view it remains a dwelling if the defects can be fixed and the building still looks like a house. Prior residential use weighs heavily against reclassification.

What Actually Succeeds

The clearest example remains P N Bewley Ltd v HMRC (2019). The property was a bungalow that had sat empty for three years. Heating and floorboards had been ripped out, and a demolition survey identified asbestos requiring urgent removal. The First-tier Tribunal ruled it was not suitable for use as a dwelling on completion, so non-residential rates applied.³ The tribunal drew a hard line: the question is not whether the building could be made into a dwelling, but whether it is one now.

Drawing from Mudan, the features that indicate a genuine non-residential classification include the loss of fundamental dwelling characteristics (no walls, floors, or roof enclosing living space); defects that cannot realistically be fixed, such as imminent structural collapse or radioactive contamination; hazards so severe that repair work itself would be dangerous; and, helpfully, no prior residential use, since a former commercial unit starts from a lower hurdle. GOV.UK’s own summary of qualifying non-residential property refers to buildings “not suitable to be lived in and cannot be made suitable (for example, there is a high risk of structural collapse or the property is radioactive).”⁴

A useful gut check: if your property still has walls, a roof, and the basic layout of rooms, the claim is an uphill battle. The cases that win tend to involve buildings an ordinary person would struggle to recognise as a home.

How Much You Could Get Back

Non-residential SDLT rates are:⁴

Up to £150,000: 0%
£150,001 to £250,000: 2%
Above £250,000: 5%

Residential rates, by contrast, run at 0% up to £125,000, 2% on the next £125,000, 5% from £250,001 to £925,000, 10% from £925,001 to £1.5 million, and 12% above that.⁵ Because non-residential rates cap at 5%, the gap widens sharply on more expensive purchases.

The bigger prize is often the additional dwellings surcharge. The Bewley tribunal confirmed that because the bungalow was not a dwelling at all, the higher-rate surcharge for company acquisitions of dwellings did not apply.⁶ The same reasoning applies to individuals buying additional properties. If the property is genuinely non-residential, the flat percentage the surcharge adds to every band drops away entirely. For landlords and investors, this is often the largest single component of a successful claim.

Your Two Routes and Their Deadlines

The route depends on how long ago you filed. The SDLT filing date is 14 days after the effective date of your transaction.⁷

Amend the Return: Within 12 Months of Filing

If fewer than 12 months have passed since your filing date, you amend the original SDLT return, switching the classification from residential to non-residential. You can do this online or by writing to HMRC. It is the simpler route because you are correcting the return rather than making a separate claim.

Overpayment Relief: Within 4 Years of the Effective Date

If more than 12 months have passed since filing but fewer than 4 years since the effective date, you make a standalone claim for overpayment relief.⁸ Apply online or in writing, with supporting documents and a signed declaration from each buyer confirming the claim is correct.

Past four years, no claim route remains. That deadline is absolute.

Evidence That Actually Carries Weight

Given how high HMRC sets the bar, evidence is the whole game. A surveyor’s note saying the property “needs extensive work” is worthless for this purpose. You need documentation showing the building had lost its fundamental character as a dwelling on completion day.

A detailed structural survey by a qualified surveyor or engineer is the foundation. It should address specific issues: collapsed floors, missing load-bearing walls, whether the building is safe to enter, and whether the defects can realistically be remedied. If environmental hazards are in play, commission specialist reports — asbestos, contamination, structural engineer’s assessment of collapse risk. Generic condition reports will not do the work.

Commission the survey as close to completion as you can manage, ideally on the day itself. HMRC focuses on the state of the property on the effective date, and a survey done weeks later loses weight quickly, especially if any clearance or demolition has begun.

Photographs matter too. Take high-resolution images of every room and the exterior, dated, close to completion. Focus on absences: missing floors, no kitchen or bathroom, exposed structural elements, collapsed ceilings.

Supporting documents that strengthen the file include local authority prohibition notices, dangerous structure declarations or building control enforcement actions, evidence that utilities are disconnected from mains, detailed contractor estimates for the remediation, and the original purchase contract and transfer deed.

Submitting the Claim

Both routes accept online submission through HMRC’s portal or a written claim by post. If writing, send to:⁹

BT – Stamp Duty Land Tax
HM Revenue and Customs
BX9 1HD
United Kingdom

Use tracked or registered post. Your claim needs to include:⁷

Your UTRN — the 11-character Unique Transaction Reference Number from your SDLT5 certificate or paper return (9 numbers followed by 2 letters, e.g. 123456789MC)¹⁰
The reason for overpayment: that the property was not suitable for use as a dwelling on the effective date and non-residential rates should have applied
The specific entries on the return that need changing
Revised figures showing the non-residential SDLT that should have been paid and the refund amount claimed
All supporting evidence — surveyor’s report, photographs, specialist assessments, other documentation
A signed declaration from each buyer named on the return that the information is correct to the best of their knowledge and belief

Solicitors and tax advisers can submit through HMRC’s online gateway on your behalf, which is often quicker than post.

After You Submit

HMRC normally processes refund payments within 15 working days of receiving the claim, direct to your bank account.¹¹ That assumes the claim goes through without queries. If the caseworker needs more information, they will write to you and the clock pauses until you respond. HMRC can also open a formal enquiry, especially on larger refunds or borderline evidence, and enquiries can extend the timeline well beyond 15 days. Site visits and further professional reports may be requested.

Successful claims attract repayment interest at 2.75% (effective from 9 January 2026), calculated from the date you originally paid the SDLT to the date HMRC issues the refund. The rate is set at the Bank of England base rate minus 1%, with a floor of 0.5%.¹² On a large overpayment sitting for several years, the interest itself can add meaningfully to the refund.

Penalties for Overreaching

The claim has to be accurate. Schedule 24 of the Finance Act 2007 scales penalties by culpability. For domestic SDLT transactions (category 1), the maximums are 30% of the potential lost revenue for careless inaccuracy, 70% for deliberate inaccuracy, and 100% where the inaccuracy is deliberate and concealed.¹³ Overstating defects to manufacture a non-residential classification can therefore cost you the refund and a penalty on top. Lean on genuine professional evidence, not aspirational descriptions of the property’s condition.

If HMRC Rejects the Claim

You do not have to accept a rejection. You can request an internal review by a different HMRC officer, which is free and often the fastest way to get fresh eyes on the evidence. If the review upholds the original decision, you can appeal to the First-tier Tribunal (Tax Chamber), which decides disputes with HMRC independently.¹⁴

Both Bewley and Mudan started at tribunal, and Mudan went on to the Court of Appeal. Tribunal appeals require you to set out grounds, submit evidence, and attend a hearing. If the sum in dispute justifies the cost, a specialist tax solicitor or barrister for the tribunal stage is worth the outlay, because the outcome will turn on how tightly your evidence maps to the Mudan framework.

One habit that keeps claims out of that appeal territory: do not lean on a single dramatic defect. HMRC’s guidance is clear that asbestos alone, structural problems alone, or missing utilities alone do not cross the threshold. The Mudan question is whether the building as a whole has lost its identity as a dwelling. Frame the evidence around that, not around a checklist of individual problems.

1
Legislation.gov.uk. Finance Act 2003 Section 116
2
GOV.UK. Residential Property – Not Suitable for Use as a Dwelling
3
ICAEW. SDLT and Dilapidated Dwellings
4
GOV.UK. Stamp Duty Land Tax – Rates for Non-Residential and Mixed Land and Property
5
GOV.UK. Stamp Duty Land Tax – Residential Property Rates
6
Practical Law. No SDLT Surcharge on Sale of Dilapidated House (First-Tier Tribunal)
7
GOV.UK. Stamp Duty Land Tax Online and Paper Returns
8
GOV.UK. Overpayment Relief – Commencement and Time Limits
9
GOV.UK. Stamp Duty Land Tax – Enquiries and Form Ordering
10
GOV.UK. Pay Stamp Duty Land Tax
11
GOV.UK. Stamp Duty Land Tax – Refunds of Stamp Duty Land Tax
12
GOV.UK. HMRC Interest Rates for Late and Early Payments
13
Legislation.gov.uk. Finance Act 2007 Schedule 24
14
Courts and Tribunals Judiciary. First-Tier Tribunal Tax Chamber