Valuers, brackets, and legal lessons in a land dispute

By Melissa Worth

Published 29th October 2025

If you have suffered financial loss due to a professional’s mistake, you may have grounds for a negligence claim. But success hinges on expert evidence: the court needs input from someone in the same field to judge whether the professional’s standard of care was breached – except, sometimes, in legal cases.

The recent case of Bratt v Jones involving a disputed land valuation, highlights how crucial it is to give your expert clear, thorough instructions. When large sums are at stake, clarity is key to succeeding in your claim. 

What insight does Bratt provide?

The example below highlights the importance of giving your expert clear and complete instructions, particularly when the court is being asked to decide whether a professional has fallen below the required standard. Valuation disputes – especially when large sums are involved – are rarely straightforward.

A land valuation that sparked a legal battle: a £4 Million Valuation vs an £8 Million Expectation 

Mr Bratt owned development land in Oxfordshire with planning permission for a housing project. Under an agreement with a developer, the land could be purchased at 90% of its market value. If the parties could not agree on the value, an independent valuer would be appointed.

That is what happened.

Mr Jones, a professional valuer, was brought in and assessed the land at £4.075 million. Mr Bratt disagreed, believing the land was worth closer to £8 million. He brought a negligence claim against Mr Jones, arguing the valuation was significantly too low.

The High Court dismissed the claim. Here’s why.

The two-stage test for valuer negligence

To succeed in a claim against a professional valuer, the claimant must satisfy two key legal tests:

1.      The Bolam Test

The claimant must show that the valuer failed to act with the skill and care expected of a competent professional. This involves assessing whether the valuer’s approach aligned with accepted professional standards.

2.      The Bracket Test

The claimant must also show that the valuation fell outside an acceptable margin of error – the range within which competent professionals might reasonably differ.

Both elements must be proven to satisfy a professional negligence claim. It is not enough to show the valuation was low; the claimant must also show that the valuer’s method was professionally flawed and the result was outside the reasonable bracket.

Where did the land valuation claim falter?

The issue in the Bratt case was that Mr Bratt’s expert had not been asked to comment on what margin of error would be reasonable. While the expert provided a higher valuation, they didn’t address the second part of the professional negligence test – the bracket.

In contrast, the defendant’s expert told the court that a ±15% margin was appropriate for this type of valuation. With no competing evidence, the judge accepted that bracket and found the likely value to be £4.746 million. Mr Jones’s valuation was 14.15% below that – comfortably within the acceptable range.

The claim failed.

Court of Appeal’s findings in the land valuation dispute

Mr Bratt appealed the decision, but the Court of Appeal upheld the High Court’s ruling, confirming that:

  • The margin of error is a matter of evidence, not a fixed legal rule.
  • A valuation outside the bracket may suggest negligence, but it is not conclusive.
  • A successful claim must include evidence on both the applicable professional standard and the appropriate bracket.

Why clear expert instructions matter in professional negligence claims

While the case did not solely depend on how the expert was instructed, it clearly shows why thorough and well-considered instructions are vital.

Do you think a professional has been negligent in dealing with a land valuation situation? If you do, to give your case the best chance in valuation-based negligence claims, do not just ask your expert for a new valuation. Ask them to explain:

  • What range of values would be considered reasonable for the asset in question?
  • Whether the original valuer’s approach fell below accepted professional standards.

By asking for an explanation, you are making sure your expert has provided the necessary response to your queries, ensuring they are properly equipped to fulfil their duty to the court and address the issues the judge must decide.

Showing a professional has breached their duty

In this example, Bratt highlights that success in valuation-based negligence claims depends on meeting both parts of the legal test with solid, relevant evidence. It is not enough to simply disagree with a valuation – you must show that the professional in the dispute breached their duty and that the result was outside the ordinary margin of error.

Thoughtful, complete expert instructions can make all the difference. Helping your expert address the specific issues the court will consider ensures your argument is given the attention it deserves, rather than relying on general advice.

If you believe you have experienced professional negligence, please contact Melissa Worth who is a specialist in this field adept at handling complex, high value claims.

One key legal lesson here is to highlight that each case is different, and you should always seek expert advice relevant to your own situation.

Case reference: Bratt v Jones [2025] EWCA Civ 562

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