8 Mistakes to Avoid When Selling a Probate Flat

Why a Probate Sale Trips People Up

Selling a flat that came to you through probate is more than an ordinary sale handled at a difficult time. It comes with its own set of complications: a valuation done for HM Revenue and Customs rather than the market, a capital gains bill that can appear out of nowhere, an empty flat quietly running up costs, and the need for all the executors to act together before anything can move. Most of these are avoidable, but only if you see them coming.

Executors and beneficiaries also tend to be doing this for the first time, often while grieving and juggling the rest of an estate. That is exactly when costly assumptions slip in: that the probate figure is the asking price, that an empty flat can simply wait, that one executor can crack on alone.

The eight mistakes below are the ones that cost the most time and money on a probate flat sale. For the step-by-step mechanics of a probate sale, our guide on the steps to take when selling a probate flat walks through the process in full; this guide is about what to avoid. It covers England and Wales; the process differs in Scotland, where probate is called confirmation, and in Northern Ireland.

8 mistakes to avoid when selling a probate flat: a practical guide for executors and beneficiaries

1. Treating the Probate Valuation as the Asking Price

The valuation carried out for probate has one job: to tell HM Revenue and Customs what the flat was worth on the date of death, so any inheritance tax can be worked out. It is often pitched conservatively, and sometimes it is no more than a quick letter from a local agent. None of that makes it the right price to sell at.

Lean on it as the asking price and you can undersell, leaving money on the table for the beneficiaries. There is a subtler trap too: deliberately understating the probate value to trim inheritance tax can rebound. Inheritance tax is charged at 40 percent above the nil-rate band of £325,000 (plus up to a £175,000 residence nil-rate band where a home passes to children or grandchildren), and both bands are frozen until April 2031. A low probate figure saves tax at that rate, but if you then sell well above it, the difference is treated as a capital gain, and HMRC can challenge a date-of-death value that looks too low.

The clean approach is to get a proper valuation from a RICS (Royal Institution of Chartered Surveyors) surveyor for the probate figure, then price the sale on current evidence: what flats in the same block or street have actually sold for recently. Our flat valuation guide covers how to read those comparable sales.

2. Forgetting Capital Gains Tax on the Rise Since Death

Inheriting a flat is not itself a tax event. Selling it later can be, and this catches people out because they expect inheritance tax to be the end of the matter.

The key point works in your favour: capital gains tax is measured from the probate value, the market value at the date of death, not from what the deceased originally paid. So only the rise between the death and the sale is taxable. If the flat has barely moved in value since death, the bill may be small or nothing; if death was several years ago and prices climbed, it can be sizeable.

Personal representatives (the executors or administrators handling the estate) pay capital gains tax on a residential gain at 24 percent, after a tax-free allowance of £3,000 that the estate can use for the tax year of death and the two tax years after it. A beneficiary who has the flat transferred into their own name and sells later is taxed from the same probate value, at their own rate of 18 or 24 percent, against their own £3,000 allowance. Selling costs such as the agent and solicitor fees come off the gain. These figures are general information rather than tax advice, and rates and allowances change from year to year, so take advice from an accountant before you sell rather than after: this is the single most common tax surprise on a probate flat, and it ties directly to getting the probate value right in the first place.

3. Agreeing a Sale Before You Have the Grant

You are allowed to put a probate flat on the market and even accept an offer before the grant of probate arrives. What you cannot do is complete the sale without it, because the grant is the document that confirms your authority to transfer the property.

That gap is where sales come unstuck. Once probate applications are submitted, online applications in straightforward cases are often granted within roughly a month, though times vary; paper applications take 15 weeks or more, and longer still if the application is stopped for an error or if inheritance tax has to be paid first. Agree a sale early in that window and a buyer can sit waiting for months, lose patience, or try to chip the price down before exchange. A cash buyer tends to wait more calmly than a mortgaged buyer stuck in a chain.

The fix is simple: the grant is usually the slowest part, so apply for it as early as you can, and be straight with buyers about the stage you are at so nobody is surprised. The probate process guide covers what you can and cannot do before the grant in more detail.

4. Leaving the Flat Empty and Unprotected

An empty flat is a running liability, not something that can be left to look after itself, and treating it as the latter can be an expensive mistake.

Insurance is the first thing to slip. Most buildings and contents policies cut back or withdraw cover once a property has stood unoccupied for 30 to 60 days, and the block's own buildings policy may carry similar conditions. Tell the insurer or managing agent and arrange unoccupied-property cover, or a claim for a burst pipe or a break-in can be turned down at the worst possible moment.

Council tax is more forgiving at first, then less so. A flat left empty after the owner's death is exempt while probate is awaited and for up to six months after the grant. After that, full council tax falls due, and once the flat has been empty for a year, councils in England can add a long-term empty premium of up to 100 percent on top of the normal bill (Welsh councils set their own empty-home premiums, which can be higher). Beyond the paperwork, keep the basics covered: redirect the post, leave the heating ticking over through winter to avoid frozen pipes, and have someone check the flat now and then. Our guide to maintaining an empty flat goes through these steps in more detail.

5. Letting Leasehold Costs Pile Up Unnoticed

A probate flat is almost always leasehold, and the lease carries on exactly as before once the owner has died. Service charge and ground rent keep falling due, and demands sent to an empty flat go unanswered.

Arrears that build up quietly cause two problems. They are a debt against the estate, and significant arrears can hold up the managing agent issuing the leasehold management pack that the buyer's solicitor needs, which stalls the sale just as it should be progressing. Tell the managing agent or freeholder about the death early and give them a contact address, so demands reach the executor rather than the doormat. On completion the responsibility for service charge and ground rent passes to the buyer, with the solicitors apportioning anything outstanding between the parties.

The lease length matters too. It keeps shortening, and if it was already short, probate is no reason to look away: the same thresholds at 80, 70 and 60 years affect what a buyer can do and what lenders will accept. Our guide to the costly mistakes on a short lease sale covers that in detail, and the service charges guide explains how charges and arrears work.

6. Co-Executors Not Pulling Together

Where a will names more than one executor, they generally have to act together. All of them must agree to sell, and all of them must sign. One executor cannot push a sale through on their own, however sensible their plan.

That is fine when everyone is aligned and a real problem when they are not. A common deadlock is one executor wanting a quick, certain sale while another holds out for a higher price months down the line. The flat sits unsold, the empty-property and leasehold costs tick along, and the estate is no nearer settled. Where there is no will, administrators are appointed under the intestacy rules and the same need to act jointly applies.

The way through is to agree the route and a realistic price among yourselves before the flat goes on the market, not in the middle of a live sale. Where ownership rather than the will is the sticking point, for instance a flat held jointly with a surviving partner, our guide to selling a flat after the death of a co-owner covers who actually has the right to sell.

7. Over-Spending on a Flat You Intend to Sell

Probate flats are often dated: a kitchen from another decade, an avocado bathroom, decor frozen in time. The instinct to do it up before selling is understandable, but for an estate it rarely pays back.

Renovation spends the estate's money up front, adds months during which the empty-property and leasehold costs keep running, and the lift in sale price seldom beats what you put in. The opposite mistake is just as common: putting an unmodernised flat on the market and expecting a modernised-flat price. Buyers price the work in, and a tired flat against a refurbished one down the road will be judged on that gap.

Usually the cleaner path is to sell as it stands: clear it, present it tidily, and let the buyer take on the modernising. A cash buyer or a refurbishment specialist will buy it whatever its condition and is often less rattled by a project than a mortgaged buyer who sees only the work ahead. If the flat needs work, our page on unmodernised flats explains how that kind of sale tends to go.

8. Sticking to One Selling Route

Executors have a duty to get a fair price for the beneficiaries, but speed and certainty carry real value too: the inheritance tax payable on the estate, the empty-property costs, and the simple weight of a sale that drags on. The mistake is to assume one route is automatically right without weighing the others.

There are three, and each trades price against speed and certainty:

Estate agent. Usually the highest headline price, but the slowest and least certain. A chain or a down-valuation can undo it. Best when there is no rush and the flat is mortgageable.
Auction. More certain, because contracts are binding when the hammer falls, and faster, though fees apply and the price can land below an estate-agent sale. It suits flats that are hard to mortgage or need work. Use a traditional auction with an unconditional sale, not a conditional one.
Cash or direct sale. The fastest and most certain, with no chain and the flat taken as it stands, but the offer sits below market value in exchange for that speed.

Getting an indicative figure from each is free and commits you to nothing, and the comparison usually makes the right choice obvious for the estate's circumstances. Our selling options guide sets the routes side by side.

Frequently Asked Questions

Can I sell the flat before probate is granted?

You can market the flat and accept an offer, but you cannot complete the sale until the grant of probate is issued, because the grant confirms your authority to transfer it. Apply for the grant as early as you can, and tell buyers where things stand so the wait does not come as a surprise.

Do I have to pay capital gains tax on an inherited flat?

Not for inheriting it. You may owe capital gains tax when you sell, but only on the rise in value since the date of death, not since the deceased bought it. The estate pays 24 percent on a residential gain after a £3,000 allowance; a beneficiary selling later is taxed from the same probate value at their own rate. Selling costs reduce the gain. Take advice from an accountant before you sell, as rates and allowances change.

Is the probate value the price I should sell at?

No. The probate value is the date-of-death figure used to work out inheritance tax, and it is often pitched low. Price the sale instead on what comparable flats have recently sold for. Pushing the sale price far above a low probate value can also create a capital gain, so it pays to get the probate figure right from the start.

Who can sell the flat if there is more than one executor?

All of them, together. Where a will names several executors they normally have to act jointly: every one of them must agree to the sale and sign the paperwork. One executor cannot complete a sale alone. Agreeing the route and the price among yourselves before marketing avoids the deadlocks that stall probate sales for months.

Do we pay council tax on the empty flat?

Not at first. A flat left empty after the owner's death is exempt from council tax while probate is awaited and for up to six months after the grant. After that the full bill applies, and once the flat has been empty for a year, councils in England can add a long-term empty premium of up to 100 percent. Service charge and ground rent on the lease continue throughout, so factor those in too.