Property Valuation for Probate: What HMRC Expects

What a property valuation for probate is

When someone dies, their estate has to be valued so it can be administered and any inheritance tax worked out. If the estate includes a property, you need a property valuation for probate.

The figure required is the open market value at the date of death. In plain terms, that is what the property would reasonably have fetched if sold on the open market on the day the person died, between a willing buyer and a willing seller.

This is a specific legal basis of value. It is not the asking price, not what a family member is willing to pay, and not what the house might be worth after repairs or a refurbishment. It is a snapshot at one fixed date.

The executor or administrator is responsible for getting this right. They sign the return, so they carry the risk if the number is wrong.

Why HMRC expects an accurate figure

Inheritance tax is charged on the value of the estate above the available thresholds. The property is often the single largest asset, so the value you put on it can move the tax bill by a large amount.

HMRC does not simply take the figure on trust. The District Valuer can review property values submitted for probate and challenge them. If the figure looks low against the local market, expect questions.

That is why a defensible valuation matters. You want a number you can explain and support with evidence, not one you have to defend after the fact with nothing behind it.

Chris Bloor, on site

A while back the family had gone with a round number from an agent, something that sat just under a threshold. The District Valuer picked it up and asked how they got there. There was nothing behind it. We were brought in after the fact and put together a valuation tied to the actual date of death, with sold comparables from that stretch of the market. The number moved a little, but it held. What mattered was that the executor could show working. When you can point to why the figure is what it is, the questions tend to stop.

When you need a formal RICS valuation, not an agent estimate

Many families start with a free estate agent appraisal or an online house value estimate. That can be fine for a small, straightforward estate that sits well below any tax threshold. But it has limits.

An agent estimate is usually a marketing figure. It is aimed at winning the instruction to sell, and it is rarely written to a professional standard or tied to the date of death. A house value estimate from a portal or tool is a starting point, not a basis of value. Neither will carry much weight if HMRC pushes back.

A formal probate valuation for property is carried out to the Red Book, the professional standard RICS surveyors work to. It states the open market value at the date of death, sets out the basis, and is supported by comparable evidence.

We recommend a formal RICS valuation where any of the following apply:

• The estate is close to, or above, the inheritance tax threshold.
• The property is unusual, large, or hard to compare.
• There is any prospect of the value being disputed between beneficiaries.
• HMRC has already queried a figure.

If you are weighing this up against a straightforward sale price, our complete guide to RICS valuations explains where a formal valuation earns its place.

What the surveyor assesses

A probate property valuation is a considered assessment, not a full survey of condition. That said, the surveyor still needs to understand the property properly to value it correctly.

The property itself

We look at the type, age, size and layout, the number of rooms, the plot, and any garaging or outbuildings. We note the general state of repair, because a property needing work is worth less than one that is ready to live in.

We also record anything that affects value: an extension, a conversion, tenure (freehold or leasehold), and any obvious defects that a buyer would factor into an offer.

The market at the date of death

The value has to reflect the market as it was on the date of death, which may be some months before the inspection. We work back to that point using sold prices and the market conditions at the time.

Comparable evidence

The backbone of any valuation is comparable evidence: recent sales of similar properties nearby. We weigh these against the subject property and adjust for differences. This is what makes the figure defensible. You can read more in what is comparable evidence.

Chris Bloor, on site

On the day I walk round noting the type, the age, the layout, how the plot sits, and whether there's a garage or an outbuilding. I record the extensions and any conversion, then the state of repair, because a house needing work is worth less than one you can move into. Tenure gets checked too. The date of death is usually months back, so the value has to reflect the market as it stood then. I pull sold prices from that stretch, similar houses nearby, and adjust for the differences. That is what the figure rests on.

How the figure feeds into inheritance tax and the estate accounts

The property value goes into the estate valuation alongside every other asset: savings, investments, personal possessions, and any debts owed by the estate.

The total, after deducting liabilities and applying the available thresholds, determines whether inheritance tax is due and how much. The property figure is often the number that tips an estate over the threshold, so accuracy here shapes the whole return.

Once probate is granted, the valuation also becomes the baseline for the estate accounts and for any later sale. If the property is sold for more than the probate value, the difference may attract capital gains tax. That link is set out in what a capital gains tax valuation involves.

The risks of getting the value wrong

Undervaluing

It can be tempting to put a low figure on the property to reduce inheritance tax. This is a false economy.

If HMRC or the District Valuer decides the figure was too low, they can revise it upwards. Where the undervaluation looks careless or deliberate, penalties can follow on top of the extra tax.

A low probate value also creates a larger gap if the property later sells for more, which can mean a bigger capital gains tax bill for the estate or the beneficiaries. What you save at probate you can pay back later, with interest.

Overvaluing

A figure that is too high has its own cost. It can push the estate into paying inheritance tax it did not owe, or paying more than it needed to.

If the property then sells for less than the probate figure, there may be a route to reclaim overpaid inheritance tax in some cases, but that is extra work and delay. It is far simpler to get the figure right at the outset.

The safe course

An accurate, well-evidenced valuation protects the executor. It gives HMRC a figure that stands up, it sets a sound baseline for any future sale, and it keeps the estate accounts clean.

If you want a sense of what this costs before you commit, see how much a probate valuation costs.

Frequently asked questions

Do I always need a RICS valuation for probate?

No. For a small, simple estate well below the inheritance tax threshold, an estate agent estimate may be accepted. Where the estate is near or above the threshold, or the property is unusual or likely to be queried, a formal RICS valuation is the safer choice.

What date should the probate valuation reflect?

The open market value at the date of death. Even if the inspection happens months later, the surveyor values the property as it stood, and as the market stood, on that date.

Who is responsible for the valuation being correct?

The executor or administrator. They sign the return to HMRC, so they carry the risk if the figure is challenged. A professional valuation gives them a defensible position.

Can HMRC challenge the figure I submit?

Yes. The District Valuer can review property values for probate and revise them if they appear inaccurate. A valuation supported by comparable evidence is much harder to dislodge.

Is a probate valuation the same as a mortgage valuation?

No. A mortgage valuation is for a lender's security and uses a current date. A property probate valuation is for HMRC and is fixed to the date of death, with a full written basis and evidence behind it.