SDLT treatment of uninhabitable dwellings after Mudan

For Stamp Duty Land Tax, “uninhabitable” is a strict legal test, not everyday language.

  • Most run‑down houses and flats are still treated as dwellings, so residential SDLT rates and often the extra 3% (Now 5%) will apply.
  • The key question is whether, on completion, the property could realistically be lived in at a basic level, not whether it is comfortable or up to modern standards.
  • Only very extreme cases (for example, unsafe shell, no realistic water or sanitation) may count as non‑residential.
  • Next step: get specialist SDLT advice, with surveyor’s reports and photos.

Scroll down for the full analysis.

Nick Garner

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What Is WRA Authorisation and Why Might It Be Needed?

Introduction

People often search for information about WRA authorisation when a land transaction in Wales is being handled by an adviser, tax agent or solicitor. The issue is usually whether someone needs formal authority to deal with the Welsh Revenue Authority on a taxpayer’s behalf, including submitting returns, discussing the case, or resolving queries.

The Question

The query concerns WRA authorisation in the context of a Welsh land transaction. In general terms, the issue is whether a taxpayer must give formal authority before an adviser or representative can correspond with the Welsh Revenue Authority and act for them in relation to Land Transaction Tax.

Nick’s Explanation

Nick’s explanation, put into general terms, is that WRA authorisation is the mechanism that allows an adviser to deal with the Welsh Revenue Authority for a taxpayer. This normally matters where the representative needs to communicate with WRA, access information, submit or amend returns, or discuss the taxpayer’s position.

In practical terms, the key point is simple: if an adviser is going to act on the taxpayer’s behalf in relation to WRA matters, authority should usually be in place before substantive dealings are carried out.

The Law

Land Transaction Tax in Wales is governed mainly by the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017. The Welsh Revenue Authority is responsible for administering that regime.

As a matter of tax administration, a taxpayer may act personally or through an authorised agent. Where an agent is used, the revenue authority will generally require clear authority before discussing confidential tax matters or accepting the agent as acting for the taxpayer in a formal capacity.

This is part of ordinary tax administration and confidentiality rules. It protects taxpayer information and ensures that returns, amendments, claims and correspondence are being handled by someone with proper authority.

Analysis

Whether WRA authorisation is needed depends on what the representative is being asked to do.

If the representative is only passing on general information, formal authority may not always be the central issue. But if they are:

  • submitting a Land Transaction Tax return,
  • amending a return,
  • making a repayment claim,
  • answering an enquiry,
  • discussing confidential taxpayer information, or
  • corresponding with WRA to resolve a live matter,

then proper authority is usually required.

In practice, this means the taxpayer should ensure that the adviser is formally appointed using the process accepted by WRA. The exact format may depend on the system being used at the time, but the underlying principle is the same: WRA must be satisfied that the adviser is entitled to act.

This is especially important where there is any dispute about the return, a claim for relief, a repayment request, or a question about whether the correct amount of tax has been paid. Without authority, the adviser may be unable to progress the matter efficiently.

Outcome

The practical answer is that WRA authorisation is generally needed if an adviser is going to deal with the Welsh Revenue Authority on the taxpayer’s behalf in relation to Land Transaction Tax. If the matter involves confidential information, filings, amendments, claims or enquiries, formal authority should be arranged as early as possible.

Practical Steps

If you need to assess your position, the sensible steps are:

  1. Identify whether the transaction is within the Welsh Land Transaction Tax regime.
  2. Confirm whether an adviser, solicitor or tax agent will be dealing directly with WRA.
  3. Check whether WRA requires a specific form of agent authorisation or digital appointment.
  4. Make sure the taxpayer gives authority before any detailed correspondence or filing takes place.
  5. Keep copies of the authorisation and any related correspondence.
  6. Where there is already a live dispute or compliance check, ensure the authority clearly covers that matter.

Conclusion

WRA authorisation is the formal permission that allows an adviser to act for a taxpayer in Welsh tax matters. If someone is going to deal with WRA about a Land Transaction Tax return or any related issue, proper authority should usually be in place first.

Legal References Used

  • Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017
  • Welsh Revenue Authority administrative requirements concerning agent authorisation and taxpayer confidentiality

This page was last updated on 22 March 2026.

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