Do you pay the higher SDLT rate if you live with family but already own buy-to-let properties?

Introduction

This is a common Stamp Duty Land Tax question. A person may live in a family member’s home as their day-to-day residence, while separately owning one or more buy-to-let properties. If they then buy a home for themselves, they often want to know whether the higher rates of SDLT apply and whether that extra charge can later be reclaimed.

The key point is that the refund rules for replacing a main residence depend on ownership as well as occupation. Simply living in a property does not mean you own a main residence for SDLT purposes.

The Question

A buyer lives in a parent’s home and treats it as their main residence, but has no ownership interest in that property. The buyer does, however, own other residential properties that are let out. They now want to buy a home to live in themselves and want to know:

• whether the higher SDLT rates for additional dwellings apply; and
• whether the extra SDLT can be reclaimed later.

Nick’s Explanation

Nick’s answer was that the higher residential SDLT rate applies in this situation, and the buyer would not usually qualify for a refund.

In anonymised form, his reasoning was:

If you do not own your current main residence but you do own other residential properties, the higher SDLT rate will generally apply when you buy a new home. To reclaim that higher charge, the rules normally require you to dispose of a previous main residence. If you never owned the home you were living in, that condition is not met.

He also noted that some people consider moving into one of their existing properties before a sale and onward purchase, but that this needs careful planning because SDLT looks at the real facts and not just labels.

The Law

SDLT on residential property is charged under the Finance Act 2003. The higher rates for additional dwellings are set out in Schedule 4ZA to the Finance Act 2003.

In broad terms, the higher rates apply when, at the end of the day of the purchase:

• the buyer owns an interest in the purchased dwelling;
• the purchased dwelling is worth £40,000 or more;
• the buyer also owns an interest in another dwelling worth £40,000 or more; and
• the purchase is not treated as a replacement of the buyer’s only or main residence.

For replacement of a main residence, the legislation generally requires the buyer to dispose of a previous only or main residence and acquire a new one. If the old residence is sold within the permitted time window, a refund of the higher rates may be available if the surcharge was paid up front.

The rules focus on ownership of the previous residence, not merely living there. A person cannot usually claim to have replaced a main residence they occupied but never owned.

Analysis

Step by step, the position usually works like this.

1. The buyer already owns buy-to-let properties. Those are existing dwelling interests for Schedule 4ZA purposes, assuming the value conditions are met.

2. The buyer is purchasing another residential property. At completion, they will own that new dwelling as well as the existing let properties.

3. That means the purchase starts from the position that the higher SDLT rates apply, unless the transaction qualifies as a replacement of an only or main residence.

4. The buyer has been living in a parent’s property, but does not own it. Occupation alone is not enough. For the replacement exception and refund rules, there must usually be a disposal by the buyer of a dwelling that was their only or main residence.

5. Because the buyer cannot sell the parent’s property, they cannot satisfy the normal disposal condition in relation to that residence.

6. Selling one of the buy-to-let properties later would not usually help unless that property had genuinely become the buyer’s only or main residence and the facts supported that conclusion.

That is why the surcharge is generally payable and not refundable in this scenario.

The same point can catch people who feel they are buying their first real home. For SDLT, the test is not whether this is the first home they intend to live in as an owner. The test is whether, at the time of purchase, they own other dwellings and whether they are replacing a previously owned only or main residence.

Outcome

In this situation, the buyer will usually have to pay the higher SDLT rate on the purchase of the new home.

They will not usually be able to reclaim that extra SDLT later, because they are not selling a previous main residence that they owned. Living in a family member’s property does not create a right to the replacement-of-main-residence refund if the buyer had no ownership interest in that property.

Practical Steps

If you are assessing your own position, the main questions are:

• Do you own any other dwellings anywhere in the world?
• Will you still own them at the end of the day of completion?
• Are you selling a dwelling that you owned and actually used as your only or main residence?
• Can you evidence that occupation and ownership clearly?

You should also review:

• the completion date of the new purchase;
• the ownership structure of all existing properties;
• whether any existing property has genuinely become your only or main residence on the facts; and
• whether any disposal falls within the statutory time limit for a refund.

If you are considering moving into one of your let properties before selling it, that is an area where the facts matter greatly. Short-term or artificial arrangements may not produce the SDLT result a buyer hopes for. The question is whether the property truly became your only or main residence in substance.

Conclusion

If you live in a family member’s home but do not own it, and you already own buy-to-let properties, buying a home for yourself will usually trigger the higher SDLT rate. In most cases, you cannot reclaim that surcharge later because you are not replacing a main residence that you owned and sold.

Legal References Used

• Finance Act 2003
• Finance Act 2003, Schedule 4ZA
• HMRC Stamp Duty Land Tax guidance on higher rates for additional dwellings

This page was last updated on 22 March 2026.

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