How do property stamp duty enquiries usually get handled?

Introduction

People often search for help with stamp duty land tax when they are unsure whether a property purchase, transfer or claim has been dealt with correctly. In many cases, the first step is simply an introduction to a specialist who can review the facts and decide whether there is an issue worth exploring further.

This article explains, in general terms, how that kind of enquiry is commonly handled and what a taxpayer should expect when seeking help with a stamp duty question.

The Question

A potential client was introduced to a stamp duty specialist to discuss a property tax issue. The introduction came through a third party who had identified the enquiry as a possible lead. The practical question was how the specialist would take the matter forward and what process would apply once the client had been referred.

Nick’s Explanation

Nick’s response was procedural rather than technical. In substance, he explained that he had already contacted the prospective client and suggested arranging a call to talk through the circumstances. He also distinguished between different types of referral, including a general lead and a more developed referral where someone had already reviewed the case and believed there was a viable issue to pursue.

In anonymised form, the key point was this: the next step was to speak to the taxpayer directly, understand the facts, and then decide whether the matter justified further paid work.

That is a sensible approach in stamp duty matters. SDLT outcomes depend heavily on the detailed facts, the transaction documents, the property’s condition at the effective date of transaction, and the precise statutory rules engaged.

The Law

The main legislation governing stamp duty on land transactions in England and Northern Ireland is the Finance Act 2003. Liability depends on the type of land transaction, the chargeable consideration, the nature of the property, and whether any relief or special rule applies.

Common issues in SDLT enquiries include:

• whether the property was residential, non-residential or mixed-use;
• whether the higher rates for additional dwellings applied;
• whether multiple dwellings relief was available for earlier transactions;
• whether a refund claim can be made after replacing a main residence;
• whether the property was unsuitable for use as a dwelling at the effective date of transaction.

Where a taxpayer argues that a property was not suitable for use as a dwelling, the modern case law is important. The threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. A property will not fall outside the residential rules merely because it needs repair, modernisation or improvement. The condition must be serious enough, judged at the relevant date, to take the property outside suitability for use as a dwelling.

Analysis

In practice, a proper SDLT review usually works in stages.

First, the adviser identifies the transaction. That means checking what was acquired, when it was acquired, who acquired it, and what was paid.

Second, the adviser checks the filing position. That includes reviewing any SDLT return already submitted, the rates used, and whether any relief or refund claim has been made.

Third, the adviser tests the facts against the legislation. For example:

• If the issue concerns mixed-use treatment, the adviser will look at the physical state of the land and the legal rights acquired.
• If the issue concerns multiple dwellings, the adviser will consider whether there were in fact two or more dwellings for SDLT purposes at the effective date.
• If the issue concerns suitability for use as a dwelling, the adviser will examine evidence of the property’s actual condition at completion.

Fourth, the adviser considers evidence. In SDLT matters, evidence can include the contract, transfer deed, title documents, estate agent particulars, survey reports, mortgage valuation, photographs, planning material and correspondence from the transaction period.

Fifth, the adviser decides whether there is a real technical point worth pursuing. That is why an initial call is often necessary. A short summary from a referrer is rarely enough on its own.

Where the argument is that a property was uninhabitable or not suitable for use as a dwelling, readers should be cautious. Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the courts have made clear that the bar is not low. Ordinary disrepair, dated condition, missing fittings, or the need for renovation will often be insufficient. The condition must be materially more serious before the dwelling is treated as unsuitable for use.

Outcome

The practical conclusion is that a referred stamp duty enquiry normally begins with a fact-finding discussion. No reliable answer can be given until the specialist has reviewed the transaction details and supporting evidence.

If there is a genuine SDLT issue, the matter may then proceed to formal advice, a return amendment, a refund claim, or a response to HMRC. If there is no viable point, the taxpayer is at least able to understand why.

Practical Steps

If you want to assess your own position, gather the following:

• the purchase completion statement;
• the SDLT return and SDLT5 certificate, if available;
• the contract and transfer deed;
• title documents and plans;
• survey reports and mortgage valuation;
• photos and evidence showing the property’s condition at completion;
• any advice previously received on the SDLT treatment.

Then ask the following questions:

• What was the exact nature of the property and land acquired?
• What was the property’s condition on the effective date of transaction?
• Was the SDLT return filed on the correct basis?
• Is there a statutory relief, refund route or amendment opportunity still in time?

If the issue relates to alleged uninhabitability, focus on objective evidence from the transaction date. Do not assume that a need for major works automatically changes the SDLT position.

Conclusion

A stamp duty enquiry should start with a careful review of the facts, documents and evidence. The right answer depends on the legislation and the property’s actual status at the relevant date. In cases involving alleged unsuitability for use as a dwelling, the threshold is now relatively high after Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

Legal References Used

• Finance Act 2003
• Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799

This page was last updated on 22 March 2026.

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