Auction property guides tend to focus on the drama of the saleroom, but the legal groundwork happens well before anyone raises a hand. If you’re buying a property at auction for the first time, the process rewards preparation: by the time the hammer falls, you’re already legally committed, so most of the important work has to happen beforehand, not after. This guide walks through buying at auction UK-style, stage by stage, from registering with the auctioneer through to completion day and what happens if things don’t go to plan.
This article is general information, not legal advice. For guidance on a specific lot or auction, speak to a solicitor before you bid.
The short answer
Buying at auction moves in the opposite order to a normal purchase. In a private sale, you agree a price, then do your legal and financial checks, then exchange contracts. At auction, the equivalent of exchange happens the moment the auctioneer’s hammer falls — so every check you’d normally do between offer and exchange needs to happen before you bid, using the auction legal pack. Our property auction solicitors page has more on how we support buyers and sellers through this process; this guide focuses specifically on what a first-time buyer needs to do and expect.
Before the auction: the steps that actually protect you
- Register with the auctioneer. You’ll typically need photo ID, proof of address and proof of funds before you can bid, whether the sale is a traditional saleroom auction or run online. Requirements vary by auction house, so check what’s needed in good time.
- Request and read the legal pack. This is the single most important document in the process. It usually includes the title, special conditions of sale, searches (if the seller has commissioned any), and sometimes a management pack for leasehold properties. Ask your solicitor to review it before you view the property, not after.
- Have your solicitor flag anything that changes your bidding decision. Restrictive covenants, missing planning permissions, short lease terms or onerous special conditions can all affect what the property is actually worth to you, or whether you want to bid at all.
- Sort your finances before, not after. Because completion timescales at auction are short, a mortgage in principle (or, ideally, a full offer) and cleared funds for the deposit need to be in place before the sale, not started afterwards.
- View the property and consider a survey. Auction properties are sold as seen, so arrange a viewing and, where the timescale and lot allow it, a survey, so you know what you’re bidding on.
- Set your maximum bid and stick to it. Decide your ceiling in advance, informed by your solicitor’s review of the legal pack and any survey findings, so the pace of the room or the online clock doesn’t push you past what you can actually afford or justify.
On auction day: what actually happens when you bid
Once bidding opens on a lot, you (or your representative) bid in the normal way. The moment the hammer falls, or the online auction’s countdown ends on your bid, the sale becomes legally binding on both you and the seller. There is no cooling-off period and no opportunity to negotiate further terms — this is why all the legal checking has to happen beforehand.
- Deposit payment. The successful bidder is usually required to pay a deposit immediately, commonly around 10% of the purchase price, though the exact percentage and any minimum deposit are set by the auction’s own conditions of sale rather than by law.
- Memorandum of sale / contract. You’ll sign paperwork confirming the sale on the day (or, for online auctions, this is typically handled electronically shortly after the sale closes). This effectively takes the place of “exchange of contracts” in a private sale.
- Buyer’s premium and other fees. Some auction houses charge a buyer’s premium or administration fee on top of the purchase price — check the auction catalogue and conditions of sale for your specific lot, as this varies between auction houses.
After the auction: completing on a tight timescale
Because the contract is already binding, the period between the auction and completion is about fulfilling obligations, not renegotiating them. A commonly used completion window at UK property auctions is around 20 working days from the auction date, though this is set by the individual auction’s conditions of sale, not a fixed legal rule, so always confirm the actual date stated in your contract. In that window, your solicitor will typically:
- Finalise any outstanding searches not already obtained pre-auction (ideally most searches were reviewed or at least ordered before you bid, precisely because there’s so little time afterwards).
- Liaise urgently with your lender if you’re completing with a mortgage, to make sure funds will be available in time.
- Deal with any final enquiries the legal pack review flagged, transfer the balance of funds, and register your ownership with HM Land Registry after completion.
What happens if you can’t complete in time
Because there’s no cooling-off period and the contract is binding from the fall of the hammer, failing to complete by the deadline in your contract carries real consequences. Depending on the specific conditions of sale, a buyer who can’t complete on time risks losing their deposit, and the seller may be able to resell the property and, in some cases, pursue the original buyer for any financial shortfall and associated costs. This is the single biggest reason finance needs to be arranged, not just started, before you bid.
Why a solicitor matters before the auction, not just after
It’s tempting to think of the solicitor’s job as something that starts once you’ve won a lot. In auction conveyancing, the more important work often happens earlier: reviewing the legal pack, spotting anything that would affect your bidding decision, and confirming your finance is genuinely ready. By the time the hammer falls, you no longer have room to negotiate title issues, missing consents, or an unexpected lease term — you’ve already agreed to buy the property as described in the pack. Instructing a solicitor to review the legal pack before the sale, alongside handling the conveyancing afterwards, is what actually protects you as a buyer. You can see more detail on how this works, and how we support buyers through the whole process, on our property auction solicitors page, and our fees page sets out how legal pack reviews and auction conveyancing are charged.
Talk to a local auction conveyancing team
If you have a lot number and a sale date, the best time to speak to a solicitor is now, not after the hammer falls. Abbey Court Solicitors acts for buyers and sellers at property auctions across Accrington and East Lancashire, reviewing legal packs, advising on bidding, and handling the tight completion timescale that follows. Contact us before you bid for a clear explanation of what a specific legal pack means for you.
FAQ
How do I register to bid at a property auction?
You’ll usually need to register with the auctioneer in advance, providing photo ID, proof of address and proof of funds. Exact requirements vary between auction houses and between saleroom and online sales, so check the specific auction’s registration process in good time.
How much deposit do I need to pay if I win the bid?
Deposits are typically due immediately when the hammer falls, commonly around 10% of the purchase price, though the exact figure and any minimum are set by that auction’s conditions of sale rather than fixed by law.
How long do I have to complete after buying at auction?
A completion window of around 20 working days after the auction is common, but this is set by the individual auction’s conditions of sale, not a universal legal rule, so always check the exact date stated in your contract.
What happens if I can’t complete on time?
You risk losing your deposit, and the seller may be able to resell the property and pursue you for any shortfall and costs, depending on the contract. Arranging finance before you bid, not after, is the best protection against this.
Do I need a solicitor before the auction, not just after?
Yes. Because there’s no cooling-off period once the hammer falls, having a solicitor review the auction legal pack before you bid is at least as important as instructing one afterwards — once the sale is agreed, it’s too late to renegotiate terms you didn’t check in advance.