Selling your house at auction: Process, fees & timelines

Auction selling used to be the preserve of repossessions, probate sales and properties with problems. It has quietly gone mainstream, helped by online bidding and by sellers who value one thing above all: certainty. When the hammer falls at a traditional auction, your buyer is contractually committed, deposit paid, with completion typically 28 days away. No renegotiation after the survey, no chain collapsing a week before exchange. This article covers how the process works, what it costs and how long it takes, including the modern method that now dominates online sales.

Traditional auction: How it works

You instruct an auction house, agree a guide price and a reserve, the minimum you will accept, and the property goes into the catalogue, usually around four weeks before the sale. Your solicitor prepares a legal pack, the bundle of title documents, searches and contract terms that bidders inspect before the auction. Marketing and viewings run in blocks during the catalogue period.

On auction day, if bidding meets your reserve, the fall of the hammer is exchange of contracts. The buyer pays a 10 per cent deposit immediately and completion follows, normally 28 days later. If bidding stalls below the reserve, the lot is unsold, though auctioneers frequently broker post-auction deals with the highest bidder.

The modern method of auction

The modern method, standard on most online auction platforms, is conditional. The winning bidder does not exchange on the day; instead they pay a non-refundable reservation fee, typically around 3 to 5 per cent of the price with a minimum of about £6,000, which buys an exclusivity period, usually 28 days to exchange and 56 days to complete.

The attraction for sellers is that the reservation fee is usually paid by the buyer on top of the price, so the sale can look free or cheap to you. The catch is that buyers factor the fee into their bids, so some of that cost comes back to you as a lower hammer price, and the conditional structure gives the buyer more room to walk away, forfeiting the fee, than an unconditional exchange ever would. It broadens the buyer pool to mortgage-dependent purchasers, at the cost of a little of the certainty that makes auctions attractive in the first place.

Traditional auction vs modern method of auction at a glance

What selling at auction costs

Budget for four items:

• Commission, typically 2 to 2.5% of the hammer price plus VAT at a traditional auction, often with a minimum fee. On a £200,000 sale, 2% plus VAT is £4,800.
• An entry or catalogue fee, commonly a few hundred pounds and sometimes more than a thousand, payable whether or not the property sells.
• Legal pack preparation by your solicitor, typically £200 to £400 or more depending on complexity, plus the underlying search costs.
• Your conveyancing fees for the sale itself, as with any disposal.

Some sellers pass part of these costs to the buyer through the special conditions of sale, a standard practice for banks and trade sellers, though heavy-handed cost shifting can suppress bidding. At modern method auctions, the buyer's reservation fee replaces some or all of the commission.

How long it all takes

From instruction to completion, a traditional auction sale typically runs eight to ten weeks: a couple of weeks preparing the legal pack, around four weeks in the catalogue, then the 28-day completion period. The modern method runs a few weeks longer at the back end. Compare that with private treaty sales, where industry data now puts average conveyancing alone at four months or more, and the appeal is obvious for sellers who prioritise a firm date over the last few thousand pounds.

Preparing properly: The seller's half of the bargain

The single thing sellers control is the quality of the legal pack, and bidders price it ruthlessly. A pack with official copies of the title, up-to-date searches, completed property information forms and, for leasehold lots, a management pack, tells investors they can bid to their ceiling. A thin pack does the opposite: serious bidders discount for the unknowns or stay away entirely. Gather the same documents you would need for any sale, the government's selling a home guidance lists the basics, and get them to your solicitor before the catalogue deadline, because a pack published late loses viewing-period momentum you cannot recover.

Is auction right for your property?

Auctions suit properties with genuine competitive appeal to investors and cash buyers: anything needing refurbishment, tenanted properties, short leases, unusual titles, probate sales and homes where the owner values speed and certainty. They suit pristine family homes less well, because the owner-occupiers who pay the best prices for those rarely buy at auction, and the as-exchange commitment excludes most mortgage-dependent buyers from traditional sales.

Price honestly. The reserve is your real protection, but a reserve set at fantasy level just produces an unsold lot and a spent entry fee. Auctioneers achieve strong results when the guide price draws a crowd and competition does the rest.

The bottom line

Selling at auction trades a slice of headline price for speed and near-certainty of completion. Expect roughly 2 to 2.5%t plus VAT in commission, a non-refundable entry fee and the cost of a legal pack, or a buyer-paid reservation fee under the modern method, and a start-to-finish timeline of two to three months. Get the legal pack right, because bidders and their solicitors read it closely; a well-prepared pack from an experienced firm directly supports your sale price.

Comparing sale conveyancing quotes early, before you book an auction date, keeps the legal side off your critical path, and our complete guide to conveyancing explains what happens after the hammer falls.