What are the legal implications of using an estate agent's valuation instead of a RICS probate valuation during probate?

Using an estate agent’s valuation during probate is not automatically unlawful, and a RICS probate valuation is not required in every estate. The legal issue is whether the personal representative has taken reasonable steps to establish and support the property’s open market value at the date of death. An informal or marketing-focused estate agent assessment may be insufficient if it does not provide suitable evidence for the estate’s tax, accounting and distribution records.

The executor’s responsibility

Executors and administrators are responsible for collecting estate assets, reporting relevant information and distributing the estate correctly. They should therefore be able to explain how the property figure was reached and why it was reasonable when the valuation was made. A property valuation prepared primarily to attract a seller or set an asking price may not address the different requirements of a probate valuation, particularly the valuation date and the assumptions used.

There is no general rule that an estate agent’s opinion can never be used. It may be useful evidence, especially where it is detailed, based on relevant comparable sales and clearly states the basis of the assessment. However, relying on a brief appraisal without checking its purpose, date, comparables or assumptions can make it harder for the executor to show that they acted properly.

Inheritance Tax and HMRC enquiries

The property figure may affect the value reported for Inheritance Tax. If the valuation is materially wrong, the personal representative may need to correct the estate’s tax return and provide supporting evidence. Any resulting tax, interest or penalties will depend on the circumstances, including the size of the error, whether reasonable care was taken and how promptly the mistake was corrected.

HMRC may ask for details such as the property’s condition, ownership interests, restrictions, marketing history and comparable transactions. It may also question a valuation that appears inconsistent with the eventual sale price or with other evidence available at the date of death. A later sale price is not automatically the date-of-death value, because market conditions, improvements and changes to the property may differ, but it can prompt further questions and should be explained where relevant.

Where the value is uncertain, the executor should retain the valuation report and consider obtaining specialist advice before submitting figures. Deliberately understating an asset, or ignoring information that indicates the figure is unreliable, creates more serious legal and tax risks than an honest estimate supported by a reasonable method.

Risks when distributing the estate

An inaccurate figure can affect the amount available for beneficiaries and the calculation of specific legacies, residuary shares or equalisation payments. If the property is later sold for substantially more than the figure used to account for the estate, beneficiaries may ask why the difference was not identified earlier. If it is sold for less, beneficiaries may question whether the estate was overvalued or whether the property was marketed and sold properly.

A beneficiary who believes the executor failed to take reasonable care may request estate accounts and supporting documents. Depending on the facts, a dispute could lead to a claim for losses, an application for directions or other court proceedings. An executor is not normally expected to predict the exact eventual sale price, but should be able to demonstrate a sensible valuation process and proper consideration of competing evidence.

Conflicts and the eventual sale

Care is also needed where the estate agent providing the valuation is later instructed to sell the property. The agent’s commercial interest in securing an instruction does not by itself invalidate the valuation, but it may raise questions about independence. Keeping the valuation, instruction terms and marketing advice separate helps show what information was used for probate and what was prepared for the sale.

If the property is sold to a connected person, to an associated business or at a price that appears unusual, the executor should obtain additional independent evidence and record the reasons for accepting the transaction. The same applies where the property is in poor condition, occupied, subject to title problems or affected by development restrictions. These factors can make a standard estate agency appraisal less dependable.

Practical steps to reduce legal risk

• Ask the valuer to identify the valuation date and confirm that the figure represents an open market assessment for probate purposes.
• Keep details of comparable properties, condition, tenure, restrictions and any assumptions that influenced the figure.
• Obtain a second opinion or a RICS valuation where the property is unusual, the estate is contentious, the tax position is significant or the initial assessment is uncertain.
• Keep photographs, repair estimates, marketing records and offers, as these may help explain differences between the probate value and a later sale price.
• Disclose relevant information accurately and correct an identified error rather than relying on an unsupported figure.
• Take advice from a probate solicitor or tax adviser where beneficiaries disagree or the valuation could materially affect tax or distribution.

A RICS probate valuation is not a guarantee that HMRC or a beneficiary will accept the figure, but it normally provides a more formal audit trail and clearer professional basis. The important legal distinction is not simply who produced the number; it is whether the evidence is appropriate for the probate purpose, reflects the correct valuation date and demonstrates that the personal representative acted with reasonable care.