Retrospective Valuation for Capital Gains Tax

If you are selling a property that has increased in value since a specific historical date, HMRC may require evidence of what that property was worth at that earlier point. A retrospective property valuation - sometimes called a backdated valuation - provides that evidence in a form HMRC and your accountant can rely upon.

What Is a Retrospective Property Valuation?

A retrospective valuation is an assessment of what a property was worth at a specific date in the past. Rather than valuing the property as it stands today, the valuer researches comparable sales and market conditions from the relevant historical date and produces a professional opinion of value for that point in time. It is produced to RICS Red Book standards and must be carried out by a RICS registered valuer - not an estate agent appraisal or online estimate.

When Might You Need a Retrospective Valuation?

This guide is informational, not tax advice - your accountant can confirm your position. Common situations include: inherited property (CGT is generally calculated from the value at the date of death); second properties and buy-to-let where the base cost needs establishing; property transferred between related parties; a change of use between main residence and rental; and losses or negligible value claims.

What Date Is Used for the Valuation?

Common reference dates include the date of death for inherited property, the date of acquisition for gifts or transfers, the date of change of use, and in some cases 31 March 1982 (a historic base date used by HMRC). Agree the relevant date with your accountant before commissioning the valuation.

How Does a Retrospective Valuation Work in Practice?

The valuer researches comparable sales from the relevant date using historic Land Registry data, archived market evidence and professional databases, then applies their knowledge of market conditions at that time to produce a reasoned opinion of open market value. The report is prepared in writing to Red Book standards, including the methodology and the date to which it applies.

Historic valuations to dates as far back as the 1980s are not unusual in estate and probate work, though the availability of comparable evidence varies.

Why Does HMRC Require a Professional Valuation?

HMRC does not accept informal estimates, online valuations or estate agent opinions for CGT purposes. They require a valuation by a RICS registered valuer, prepared to Red Book standards. If a formal valuation isn't in place and HMRC queries a return, they may substitute their own estimate, which may not work in your favour.

Retrospective Valuations and Probate

When a property is inherited, the Red Book valuation at the date of death is used both for inheritance tax at probate and as the base cost for any future CGT calculation. If the property wasn't professionally valued at probate and is now being sold, a retrospective valuation to the date of death will typically be needed.

Frequently Asked Questions

Can an estate agent produce a retrospective valuation for HMRC? No - HMRC requires a Red Book valuation by a RICS registered valuer.

Do I need one if I have the original purchase price? Not always. If the purchase was straightforward, the original price may suffice. If the property was inherited, gifted or transferred below market value, a retrospective valuation may be needed. Your accountant can advise.

Speak to NIVEK About a Retrospective Valuation

If you are dealing with a property disposal and need an evidenced valuation at a historic date, NIVEK Surveying Services prepares formal Red Book valuations for capital gains tax and estate purposes across the East Midlands. This guide is for general information only - for advice specific to your tax position, please speak with a qualified accountant or tax adviser.