Extended Period for Property Disposal Due to Fire Safety Defects Explained

LTT higher rates: extra time to sell an old home with fire safety defects

If you bought a new main home before selling your old one and paid higher residential rates of Land Transaction Tax, you may get extra time to claim a refund where the old home could not be sold within the usual 3 years because of a serious fire safety defect. This is a limited extension only for certain cases and you must still meet the normal replacement of main residence rules.

• The old home must have had a fire safety defect that substantially reduced buyer interest or significantly reduced its market value.
• The defect must have existed when the property was first acquired, and the buyer must not reasonably have known about it at that time.
• There must have been a relevant person with a legal duty to fix the defect, such as a landlord, commonhold association or developer, depending on the type of ownership.
• If the defect was fixed before the sale, the old home must have been sold as soon as reasonably practicable afterwards.
• The rule mainly affects refund claims: the claim must be made within a special 12-month time limit and should explain how all conditions are met.
• The extension does not create a general exemption from higher rates, and a developer will not usually qualify if it was also the owner responsible for the defect.

Scroll down for the full analysis.

LTT higher rates: extended time to sell your old home where it had fire safety defects

This page explains a special extension to the usual time limit for reclaiming higher residential rates of Land Transaction Tax when you bought a new main home before selling your previous one, but the old home could not be sold within the normal period because of a fire safety defect. The rule is narrow and condition-based. It does not remove the normal replacement of main residence rules. It only extends the period for disposal in certain fire safety cases.

What this rule is about

Under the normal replacement of main residence rules, a buyer may pay higher residential rates when buying a new home if they still own their previous main residence at that point. If they then dispose of the old main residence within the permitted period, they may be able to claim a refund of the higher rates.

The source material deals with a problem that arose in practice: some people could not sell their former home within the normal 3-year period because the property was affected by serious fire safety defects. In those cases, the law can allow a longer period than the usual 3 years. This is called the extended permitted period.

What the official source says

A longer period may apply if the former main residence had a fire safety defect and all the stated conditions are met.

The defect must have had a serious effect on saleability or value. In particular, it must have at least:

• substantially reduced the number of people interested in buying the dwelling, compared with the position if there had been no defect, or
• substantially reduced the market value of the dwelling, compared with the position if there had been no defect.

In addition, each of the following conditions must be met:

• when the dwelling was first acquired by the buyer, or by their spouse or civil partner, including a former spouse or former civil partner, the dwelling had a fire safety defect that the buyer could not reasonably have known about;
• a relevant person had a duty to remedy the defect; and
• either the defect had not been remedied by the effective date of the disposal transaction, or, if it had been remedied, the disposal transaction was entered into as soon as reasonably practicable after the defect was remedied.

The source also defines who can be a relevant person, depending on the type of major interest in the sold dwelling:

• for a leasehold interest: the landlord of the person who held the major interest, or the developer;
• for a freehold interest in commonhold land: the commonhold association, or the developer;
• for a freehold interest: the developer.

There is an important limitation. A developer is not treated as a relevant person if the developer is also the person who held the major interest. So a developer selling a dwelling affected by a fire safety defect for which that developer was responsible will not qualify for the longer period unless some other relevant person had the duty to remedy the defect.

Where the extended permitted period applies, the ordinary claim time limit under section 78 of the Tax Collection and Management (Wales) Act 2016 is replaced by a special time limit for claims under section 63 of that Act. Which new limit applies depends on when the disposal transaction took place:

• if the effective date of the disposal is after the regulations came into force, the claim must be made within 12 months beginning with that effective date;
• if the effective date of the disposal is before the regulations came into force, but on or after 1 April 2021, the claim must be made within 12 months beginning with the date the regulations came into force.

A claim relying on this extended period must explain how the conditions are met. The source also makes clear that all other conditions in paragraph 8 still have to be satisfied for the replacement of main residence exception to apply.

What this means in practice

The rule is aimed at people who bought a new main home, paid higher rates because they still owned the old one, and then could not sell the old home in time because fire safety problems made the property effectively unsaleable or significantly depressed its value.

The extension is not automatic just because a building had cladding issues or another fire safety problem. The defect must have had a substantial impact on the market for that dwelling or on its value. There must also have been someone else with a legal duty to put the defect right, and the buyer must not reasonably have known about the defect when the old home was first acquired.

The timing also matters. If the defect was eventually fixed, the old home must then have been sold as soon as reasonably practicable afterwards. That does not necessarily mean immediately, but it does mean there should not be an avoidable delay. The source material points to a practical test: once remediation is complete, was the property put on the market and sold without unnecessary waiting?

This rule mainly affects refund claims. It changes the time allowed to claim overpaid tax where the extended permitted period applies. It does not create a wider exemption from higher rates. You still need to fit within the replacement of main residence rules generally.

How to analyse it

A sensible way to approach the issue is to work through the following questions.

• Was the sold dwelling your former only or main residence for the purposes of the replacement rules?
• Did you buy a new main residence first and pay higher residential rates because you still owned the old one?
• Was the old dwelling affected by a fire safety defect?
• Did that defect substantially reduce buyer interest or substantially reduce market value?
• When the old dwelling was first acquired, was the defect already there, and could you reasonably have known about it at that time?
• Was there a relevant person with a duty to remedy the defect, such as a landlord, commonhold association, or developer, depending on the legal interest involved?
• At the date of disposal, had the defect still not been remedied, or, if it had been remedied, was the sale entered into as soon as reasonably practicable afterwards?
• Are all the other replacement of main residence conditions still met?
• Was your refund claim made within the special 12-month time limit that applies under these regulations?
• Does your claim clearly explain how each condition is satisfied?

In practical terms, evidence is likely to matter. The source does not list documents, but the conditions themselves suggest the importance of showing the existence of the defect, its impact on saleability or value, who had the duty to remedy it, when remediation happened, and what steps were taken to sell the property afterwards.

Example

Illustration based on the source material: Ms A acquired a leasehold flat in 2015 and lived in it as her only and main residence. On 1 April 2018 she bought a house in Wales as her new main residence and paid higher residential rates because she still owned the flat.

Later, serious fire safety defects in the flat building came to light. The defect substantially reduced the flat’s market value. The defect was not remedied by 1 April 2021, which was the end of the normal 3-year period after buying the new home. The freeholder had the duty to remedy the defect.

The defect was finally remedied in August 2023. Ms A re-listed the flat in September 2023, exchanged contracts in November, and completed in December 2023.

On these facts, the source says Ms A can make a claim for a refund of the higher residential rates once the regulations came into force on 12 July 2024. The example shows the key points: the defect affected value, someone else had the duty to fix it, the defect prevented sale within the normal period, and the property was sold promptly after remediation.

Why this can be difficult in practice

Several parts of the rule are fact-sensitive.

First, the defect must have substantially reduced buyer interest or value. “Substantially” is an evaluative test. Not every defect, delay, or market difficulty will be enough.

Second, the buyer must not reasonably have known about the defect when the dwelling was first acquired. That can depend on what information was available at the time and what a reasonable buyer in that position would have understood.

Third, the identity of the relevant person depends on the legal nature of the interest sold. In a flat, this may require careful attention to the lease structure, the landlord, the developer, or a commonhold association.

Fourth, if the defect was fixed before the sale, the disposal must have been entered into as soon as reasonably practicable afterwards. That leaves room for judgement. Some delay may be explainable, but a long unexplained gap could create difficulty.

Finally, this extension does not replace the rest of the replacement of main residence rules. A person may satisfy the fire safety conditions but still fail on another requirement in paragraph 8.

Key takeaways

• The normal 3-year disposal period can be extended where a former main residence could not be sold because of a qualifying fire safety defect.
• The extension only applies if all stated conditions are met, including substantial impact on value or buyer interest, lack of reasonable prior knowledge, and a duty on a relevant person to remedy the defect.
• If relying on this rule, the refund claim must be made within the special 12-month time limit and must explain how the conditions are satisfied.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Extended Period for Property Disposal Due to Fire Safety Defects Explained

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