Three Estate Agent Valuations Is Not a Probate Valuation

To value your mum's house for probate you need one specific thing: the open market value on the date she died — the price the property might reasonably have fetched on the open market that day, not what it was worth when she bought it and not what you hope it sells for now. That single figure goes into the estate accounts, decides whether inheritance tax is due, and quietly becomes the number the beneficiaries are taxed against if they ever sell.

Here is the part that catches families out. The cheerful appraisal an estate agent posts through the door to win the instruction is not, on its own, a probate valuation. Three glossy agent letters are three marketing opinions, not a defensible figure. For a modest estate comfortably within the tax-free allowances they may be perfectly adequate. But where inheritance tax is in play, HMRC expects a formal valuation, and if the number looks wrong it can send in its own valuer to check it.

This page explains what a proper probate valuation is, when a marketing appraisal will do and when it will not, what triggers the District Valuer, and why understating the house to save tax now can cost the family more later.

What a probate valuation actually is

For inheritance tax, the law asks for the price the property would fetch if sold on the open market at the moment of death — an arm's-length sale between a willing buyer and a willing seller, with the house presented as it actually was. It is a snapshot, frozen on one date. A rising or falling market afterwards does not change it, though it may matter later for other taxes.

Because that figure has to survive HMRC's eye, it needs to be more than a number plucked from a window card. It needs to be reasoned and evidenced: comparable local sales, the property's condition, its size and any features that push the value up or down. The more the figure matters — because tax turns on it — the more robust that evidence has to be.

Estate agent appraisal versus a RICS "Red Book" valuation

An estate agent's appraisal is a view on what price might attract a buyer and win the agent your business. It is free, it is quick, and it is not independent of the agent's interest in getting the instruction. It also tends to describe today's asking price, not the open market value on a past date.

A formal valuation carried out by a chartered surveyor to the "Red Book" standard — the RICS Valuation Global Standards — is a different document. It is prepared by a qualified, regulated professional who is independent of the sale, dated precisely to the date of death, and set out with the comparables and reasoning behind it. It carries far more weight with HMRC because it is designed to. You can find a chartered surveyor through the RICS Find a Surveyor service; the surveyor should be a registered valuer.

The rule of thumb is proportionate. Getting three written appraisals and taking a considered figure from the middle is a common and reasonable approach for a simple, clearly non-taxable estate. Paying for a Red Book valuation is the sensible choice the moment real tax rests on the number.

When an appraisal is enough, and when it is not

The dividing line is usually inheritance tax. Every estate has a tax-free allowance, the nil-rate band, and where a home is left to children or grandchildren there is an additional residence nil-rate band on top of it.

Source: HMRC, Inheritance Tax rates and allowances, gov.uk, published under the Open Government Licence v3.0. The nil-rate band is £325,000 and the residence nil-rate band is up to £175,000, both frozen at those levels for several tax years.

If the whole estate sits comfortably below the available allowances, an unusually precise house valuation changes nothing about the tax, and written agent appraisals are typically fine. If the estate is near the threshold, or plainly over it, the house valuation may be the very thing that decides whether tax is payable and how much — and that is exactly when to pay for a formal valuation. The residence nil-rate band has its own conditions, and where the home passes to a stepchild or through a more complicated route it is worth reading how the residence nil-rate band applies when the home goes to a stepchild before assuming it is available.

What brings in the District Valuer

When HMRC doubts a property figure on an estate where tax is at stake, it does not simply argue by letter. It refers the valuation to the District Valuer — the property specialist within the Valuation Office Agency, HMRC's own independent valuation arm — who forms a view of the open market value at the date of death and negotiates it with the estate.

The things that draw that attention are fairly predictable:

• A figure that looks low against comparable sales in the same street or postcode.
• A quick resale after death at a markedly higher price, which invites the question of why the probate figure was so much lower.
• An unusual property, or one with development or building potential that a plain valuation may have ignored.
• Any estate where the house valuation is what decides whether inheritance tax is due at all.

A District Valuer referral is not an accusation, but it does add time and correspondence, and it can end with a higher agreed value and more tax. A well-evidenced valuation from the start is the best defence against it. Note, too, that if you have already accepted an offer well above the probate figure, that sale price becomes hard to argue with — a tension that bites when a sale is progressing, as in what happens when a probate sale is delayed and the buyer walks.

The trap: undervaluing to save tax now

There is a temptation, where inheritance tax is due, to lean on a low house value to shrink the bill. It is a trap, for two reasons.

The first is that the probate value becomes the base cost for capital gains tax. When the beneficiaries later sell the property, their taxable gain is the sale price minus that probate value. Understate the house by, say, a large margin to save inheritance tax, and you hand the beneficiaries a correspondingly larger capital gain when they sell. If the estate paid inheritance tax at the standard 40% rate on the amount above the allowances, the saving might look worthwhile — but the gain can be taxed too, so in many cases undervaluing simply moves the charge rather than removing it, and sometimes makes it worse.

Source: HMRC, Inheritance Tax rates and allowances, gov.uk. The standard inheritance tax rate is 40% on the value of an estate above the available allowances.

The second reason is that it does not work if it is not true. A figure that cannot be justified is the figure most likely to be referred to the District Valuer. The safe course is the accurate one: value the house properly, claim every allowance you are entitled to, and keep the evidence. Where several beneficiaries inherit the property together and one intends to stay, the base cost and any later gain get more complicated still — we cover that in what happens when siblings inherit a house and one of them lives in it. There is also a limited relief where qualifying property is sold for less than the probate value within a set period after the death; the conditions are strict, so take advice rather than relying on it as a plan.

Getting the figure right

A defensible valuation rests on evidence you can point to later. A few practical points:

• Use real comparables. HM Land Registry publishes the actual prices paid for property sales, which is the strongest evidence of local values because it records completed transactions, not asking prices.
• Date it to the death, not to today. If the market has moved since, the estate value is still the value on the date of death. A surveyor's report will state the valuation date explicitly.
• Value the condition as it was. If the house was tired or mid-renovation, that is part of the value. Photographs taken before anything is cleared or repaired are worth keeping.
• Mind a shared ownership. Where the deceased owned only a share of the property, the estate holds that share, and the way a part-share is valued differs from the whole.

Source: HM Land Registry, Price Paid Data and UK House Price Index, published under the Open Government Licence v3.0.

One caution on timing: do not empty and repair the house before the valuation and any photographs are done, and check the insurance position before you start clearing, because clearance and unoccupancy interact — see clearing the house before probate and what it does to the insurance.

Scotland and Northern Ireland

Inheritance tax is a UK-wide tax administered by HMRC, so the open market value test, the allowances and the 40% rate are the same wherever the property is. The requirement to value the house properly does not change north of the border or across the Irish Sea.

What differs is the process the valuation feeds into. In Scotland the estate is dealt with by confirmation rather than probate, and the value of heritable property goes into the inventory of estate on form C1 rather than an English probate form. In Northern Ireland the application runs through its own probate office with its own forms, which we set out in how probate in Northern Ireland works for a small estate. The role of a formal valuation, and HMRC's ability to challenge a figure it doubts, applies across all three systems. For the wider picture, our guide to probate, the estate and inheritance tax pulls the pieces together.

Finally, a valuation is a snapshot of what the family already owns — it does not create money to pay the tax it reveals. Where an estate is asset-rich but cash-poor, the inheritance tax can fall due before the house can be sold to fund it. Life cover written in trust is one of the ways families bridge that gap; if it is relevant to your own situation you can get life insurance quotes and have an FCA-authorised broker look at it properly.

Frequently asked questions

Do I need a RICS valuation for probate?

For a straightforward, lower-value estate comfortably within the allowances, written estate agent appraisals may be enough. Where inheritance tax is payable, where the property is unusual, or where the figure itself decides whether any tax is due, a formal RICS "Red Book" valuation at the date of death is far safer. It is independent, properly evidenced and designed to withstand HMRC scrutiny, which agent appraisals are not.

What makes HMRC refer a valuation to the District Valuer?

Typically a figure that looks low against comparable local sales, a quick resale afterwards at a much higher price, an unusual or development-potential property, or an estate where the valuation decides whether tax is due. The District Valuer then gives HMRC an independent opinion of the date-of-death value and negotiates it with the estate. A well-evidenced valuation from the outset is the best way to avoid a referral.

Does the probate value affect capital gains tax later?

Yes. The value agreed for probate becomes the base cost for the beneficiaries, so their taxable gain on any later sale is the sale price minus that figure. Understating the house to reduce inheritance tax can simply move the charge to capital gains tax, and sometimes increases the total tax paid. Getting the figure right at the outset, and keeping the evidence, avoids that trap.