What factors influence the accuracy of a RICS probate valuation?

A RICS probate valuation is most accurate when the valuer has the correct valuation date, a clearly defined purpose, reliable property information, suitable market evidence and adequate access for inspection. The report is a professional opinion of the property’s market value at a specified date, rather than a guaranteed sale price, so the quality of the instructions and evidence directly affects its reliability.

The valuation date

For probate, the relevant date is often the date of death. This can mean the valuer is assessing a historic value rather than the property’s present-day worth. The valuer may therefore need to reconstruct the market evidence available at that time, taking account of transactions that completed near the valuation date and adjusting them where circumstances differed. Using evidence from the wrong period can produce a materially misleading result, even if the property is inspected carefully.

The purpose and basis of valuation

The instruction should explain why the valuation is required and who will rely on it. A valuation prepared for inheritance tax reporting may require a different level of explanation from one prepared for estate administration, a sale decision or a dispute between beneficiaries. The valuer also needs to apply the appropriate basis, usually market value, and state any assumptions or special assumptions used. Ambiguous instructions can lead to a report that answers a different question from the one the personal representatives need resolved.

Quality of the inspection

An inspection gives the valuer an opportunity to assess the layout, materials, construction, accommodation and visible condition rather than relying solely on descriptions or photographs. Restricted access can limit the valuer’s ability to verify rooms, outbuildings, loft areas, garages, gardens or other parts of the property. If areas cannot be inspected, the report should record the limitation and explain how it affects the valuation.

Accuracy can also be affected by changes made between the valuation date and the inspection date. For example, clearance work, repairs, alterations or deterioration may mean that the property seen by the valuer is not identical to the property that existed at the relevant date. A clear chronology, supported by photographs, invoices or other dated records, can help the valuer distinguish historic circumstances from later changes.

Property information and supporting documents

Documents supplied to the valuer can help verify matters that are not obvious during an inspection. Useful information may include floor plans, previous sale particulars, building or renovation records, guarantees, planning documents, tenancy information and details of insurance claims. The valuer should be told about known matters that could affect buyer interest, even where they are not immediately visible.

Measurements are another important consideration. Inaccurate floor areas, omitted extensions or a misunderstanding of the accommodation can affect the selection and analysis of comparable evidence. Plans and measurements should be checked against the actual arrangement where possible, particularly if rooms have been converted, combined or used differently from their original design.

Comparable evidence and professional analysis

A valuer does not normally identify accuracy by finding one identical property. Instead, relevant transactions are compared and adjusted for differences such as accommodation, specification, age, position within a development, plot characteristics and transaction circumstances. The strength of the conclusion depends on how closely the evidence matches the subject property and how transparently the adjustments are explained.

Sale particulars alone may not establish the price achieved or the circumstances of a transaction. Completed sale data, where available, generally provides stronger support. The valuer must also consider whether a transaction was genuinely open-market, whether either party had unusual motivation and whether the evidence relates sufficiently closely to the valuation date.

Marketability and buyer assumptions

The likely pool of purchasers can influence market value. Features such as a non-standard layout, restricted access, limited parking, a short lease or unusual construction may narrow demand or affect how buyers assess risk. These issues should be analysed in terms of their effect on market behaviour, rather than treated as automatic deductions. The same feature can have different consequences depending on the type of property and the evidence available.

Valuer competence and compliance

The valuer’s experience with probate work, the relevant property type and retrospective valuations can affect the quality of the analysis. A suitable valuer should follow applicable RICS professional standards, keep an auditable record of the evidence considered and explain material assumptions, limitations and conflicts of interest. Independence is important: the valuation should not be adjusted to produce a preferred tax, sale or distribution outcome.

How personal representatives can improve reliability

• State the required valuation date and purpose clearly when giving instructions.
• Provide documents, photographs and a timeline of relevant changes to the property.
• Arrange access to all reasonably accessible parts of the property.
• Identify known restrictions, occupier arrangements, alterations and unresolved issues.
• Ask the valuer to explain significant assumptions, excluded areas and limitations.
• Check the completed report for factual errors before it is submitted or relied upon.

A well-supported RICS probate valuation therefore depends on more than the valuer’s inspection. Correct instructions, a properly established valuation date, verifiable property information, appropriate comparable evidence and transparent professional reasoning all contribute to a conclusion that can be understood and defended by the estate’s representatives and relevant authorities.