Can you reclaim the higher SDLT rates if a former buy-to-let was once your main residence?

Introduction

A common SDLT question arises where someone owns a rental property, later buys a new home to live in, and pays the higher rates for additional dwellings. The issue is whether they can later reclaim that extra SDLT if they sell the older property.

The answer depends on whether the older property counts as the purchaser’s previous main residence at the right time. A property does not qualify simply because the owner lived in it at some point in the past. The timing rules are critical.

The Question

The scenario was this: a buyer purchased a flat as a buy-to-let, then lived in it for about 18 months, and afterwards let it out again for several years while renting elsewhere. The buyer later purchased a separate home to live in and paid the higher SDLT rates because the earlier flat was still owned at completion.

The buyer had been told that if the flat was sold within three years of buying the new home, the extra SDLT might be reclaimable. The point needing clarification was whether the earlier period of occupation meant the flat could still count as the previous main residence for refund purposes.

Nick’s Explanation

Nick’s explanation was that the refund rules only work where the purchaser buys a new main residence and disposes of their previous main residence within the permitted period. In anonymised form, his reasoning was:

“If you buy a new property and sell your previous main home within three years, you can reclaim the additional stamp duty rates. However, where the property was your main residence many years earlier and has since been let, it falls outside the relevant timeframe. In that situation, selling it later would not produce a refund of the higher rates.”

That is the key point. The fact that the flat was once lived in does not by itself preserve refund eligibility indefinitely. The disposal must be of the purchaser’s previous only or main residence within the statutory timing rules.

The Law

The higher rates of SDLT for additional dwellings are set out in Schedule 4ZA to the Finance Act 2003.

Broadly, the higher rates apply when, at the end of the day of the purchase of a dwelling:

• the purchaser owns an interest in another dwelling worth at least the minimum threshold, and
• the new purchase is not a replacement of the purchaser’s only or main residence.

A purchase can still be treated as a replacement of a main residence even if the old main residence has not yet been sold by the completion date, but only if the old main residence is disposed of within the period allowed by the legislation. Where that happens, the purchaser may claim a refund of the higher rates already paid.

In general terms, the refund mechanism depends on these ideas:

• the new property must be intended as the purchaser’s only or main residence;
• the purchaser must dispose of a dwelling that was their previous only or main residence;
• that disposal must occur within the statutory time limit, usually within three years of buying the new home; and
• the refund claim must then be made within the relevant claim deadline.

HMRC’s published guidance on replacing a main residence follows the same approach. The question is not merely whether the old property was ever occupied as a home, but whether it was the previous only or main residence for the purposes of the replacement rules.

Analysis

Step one is to identify what happened when the new home was bought. At that point, the buyer still owned the earlier flat. That meant the buyer owned more than one dwelling, so the higher SDLT rates were payable unless the purchase qualified as a replacement of the only or main residence.

Step two is to ask whether the earlier flat was the previous main residence being replaced. On these facts, the buyer had lived in the flat for a period, but then stopped living there years before buying the new home. After moving out, the flat was let, and the buyer lived elsewhere.

Step three is to consider the three-year replacement framework. The legislation allows a refund where a buyer purchases a new main residence first and then sells the old main residence within three years. But that assumes the property sold is in fact the old main residence being replaced. If the property ceased to be the buyer’s main residence long before the later purchase, it will not usually satisfy that requirement.

Step four is to apply that to the timeline. Here, the occupation of the flat ended many years before the purchase of the later home. By the time the later home was bought, the flat had long since become an investment property rather than the previous main residence in the relevant sense.

That is why the earlier occupation does not rescue the refund claim. The problem is not simply that the flat was let out. The real issue is that the period when it was the buyer’s home was too far removed from the later purchase.

So even if the flat is sold within three years after buying the newer home, that sale would not be treated as the disposal of the previous main residence for Schedule 4ZA refund purposes.

Outcome

On these facts, the higher SDLT rates paid on the later home would not be reclaimable merely because the earlier flat is sold within three years.

The earlier flat was once occupied as a home, but it had ceased to be the buyer’s main residence long before the later purchase. As a result, its later sale would not count as the disposal of the previous main residence under the replacement rules.

Practical Steps

If you are trying to work out whether a refund is available, it helps to check the following in order:

1. Identify the completion date of the new home purchase.
2. List every dwelling interest you owned at the end of that day.
3. Identify which property was genuinely your only or main residence immediately before moving to the new home.
4. Check whether that previous main residence was sold before the new purchase, or within three years afterwards.
5. Check whether any refund claim was, or can still be, made within HMRC’s time limit.

You should also keep evidence of actual occupation, such as council tax records, electoral roll entries, utility bills, mortgage correspondence, tenancy agreements, and moving dates. In borderline cases, the factual question of which property was the only or main residence can be important.

If the argument turns on whether a dwelling was unsuitable for use as a residence, note that the threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. Ordinary disrepair or the need for works will not necessarily be enough.

Conclusion

A property does not qualify for an SDLT refund simply because you once lived in it. To reclaim the higher rates after buying a new home, the property you later sell must be your previous only or main residence within the statutory replacement rules. Where the property stopped being your home many years earlier and was then held as a buy-to-let, a refund will usually not be available.

Legal References Used

• Finance Act 2003, Schedule 4ZA
• HMRC guidance on higher rates for additional dwellings and replacement of only or main residence
• 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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