Buying a property at auction is a fast way to expand your UK property portfolio, but it does come with risks.
When the auction ends and you win, you are instantly under contract. You will usually need to pay the rest of the balance within a few weeks.
This guide explains how UK property auctions work, what costs to expect, how overseas investors can bid online, by phone, or by proxy, and what you need to prepare before the sale.
What is a property auction?
A property auction is a public sale. Each property, called a “lot”, goes to the highest bidder if they reach or beat a hidden minimum price called the reserve, which the seller sets.
Properties usually end up at auction for 2 main reasons:
- They have been inherited or repossessed
- They require repairs that might deter buyers on the open market.
Auctions are a common way to buy property in the UK. Essential Information Group reports that 27,268 residential lots were sold at auction in the UK in the 12 months to July 2026, raising just under £5bn.
However, the auction process is different from a typical property purchase. This difference brings both opportunities and risks.
How does a UK property auction work?
The auction process moves quickly:
- About a month before the sale, the auction house releases a catalogue so you can find and inspect potential properties.
- You view the property, review the legal pack, and then place your bid on auction day.
- If you win, you pay a deposit immediately and complete the purchase on a set date.
Many first-time bidders are caught off guard by when they become legally committed. On the open market, you can withdraw up until contracts are exchanged. At a traditional auction, however, the fall of the hammer is when the contract becomes binding.
There are 2 main types of property auctions in the UK, and they work quite differently:
The modern method, sometimes called a conditional auction, gives buyers more time to complete the purchase, but requires a non-refundable reservation fee.
Pay close attention to this fee: it is usually 4%-5% of the purchase price plus VAT, with a minimum of around £5,000 to £6,000.
This fee is added to the purchase price, not deducted from it. If you mistake a 4.5% fee for a 10% deposit, you could miscalculate your costs.
Note: These are typical, not universal, terms. The deposit amount, buyer’s premium, and completion date are all set out in the special conditions of sale for your lot, so be sure to read that document carefully.
Is it worth buying a property at auction?
Auctions can offer great opportunities, but they punish those who improvise or skip essential steps. So, success comes down to preparation.
There are some clear upsides:
- You may be able to buy for less than the property’s open-market value.
- The timeline is set in advance, so you know exactly when you will complete.
- Once the hammer falls, the deal is done. No one can swoop in with a higher offer.
But there are downsides, too:
- You will pay for surveys and legal checks on properties you might not end up buying.
- The property’s condition is your responsibility from day one.
- If you walk away after winning, it can be very costly.
Anyone can bid, including first-time investors. However, beginners often lose money for predictable reasons, such as skipping the legal pack or bidding without cleared funds ready.
A quick heads-up: auctions probably are not the right choice if you need a regular mortgage for a property in poor condition, have not arranged for a UK solicitor, or cannot get your deposit into a UK client account in cleared funds ahead of the sale.
Can an overseas investor bid at a UK auction?
Yes, non-UK residents can register and bid at UK property auctions, and most auction houses are very familiar with overseas buyers.
You will need to provide photo ID, proof of address, evidence of your source of funds, and have a UK solicitor ready before the auction.
A few things take longer when you are buying from abroad, such as:
- Money laundering checks can move more slowly with overseas documents
- International transfers often take a few days to clear
- Everything runs on UK business hours.
You can bid online, by phone, or by proxy (where the auctioneer bids up to your written maximum). Just remember that registration usually closes at least a day before the auction, so get it done early.
How can you bid from another country?
There are 3 main ways to bid from overseas, and the best option depends on your time zone and how much control you want on auction day.
Option 1: Bidding online
You register ahead of time, upload your identification, and place a card authorisation or holding deposit. On auction day, you watch the lots and bid in real time from wherever you are.
This works well if the auction is during your waking hours and you want to follow every bid. The main risk is your internet connection, so use a wired network if possible and keep the auction house’s phone number handy in case the stream drops.
Option 2: Bidding by telephone
You register in advance, and a member of the auction team calls you just before your lot comes up. They then relay your bids into the room.
This is a good option if you want someone to guide you through the sale. Double-check the UK time, provide two contact numbers, and keep your line free for the whole session, as lots can run ahead of schedule.
Option 3: Bidding by proxy
You give the auctioneer your maximum bid in writing, and they bid up to that amount, stopping automatically. This is best if the auction happens overnight in your time zone, and it helps you stick to your limit.
Note: Registration usually closes at least a day before the auction, so whichever method you choose, complete it early rather than waiting until the morning of the auction.
How much does it cost to buy a property at auction in the UK?
You will need more than just the hammer price, and you will need the funds sooner than you might expect.
You must pay the deposit in cleared funds on auction day. Other costs, like fees and taxes, come up quickly too. Here is a breakdown of what to expect:
Taxes depend on where the property is. Stamp Duty Land Tax and the 2% non-resident surcharge apply only in England and Northern Ireland.
Beyond the auction, refurbishment is a cost buyers often underestimate. Auction catalogues rarely reveal the true condition of a property that needs work. Calculate the total project cost before you decide on your maximum bid.
If your numbers only work at the hammer price, the deal probably is not right for you.
Can you get a mortgage on an auction property?
Getting a mortgage for an auction property is possible, but rarely fast enough.
Traditional auctions usually give you about 28 days to complete, while most mortgages take weeks or even months, and overseas applications are even slower.
The property’s condition is another major hurdle: Many auction lots have no working kitchen or bathroom, or need significant repairs, and most mainstream lenders will not offer a mortgage for properties in that state.
Because of this, most auction buyers use short-term finance to purchase and fix up the property. Once it is ready to let, they refinance with a buy-to-let mortgage. For more details on how auction finance works and its costs, check out our article on auction finance.
What should you do before you bid?
Preparation is key if you want to win at auction. If you start now, a month is usually enough time to get ready.
Start by looking for lots in auction house catalogues and on the main property portals. Make sure the auctioneer is a member of a professional body like NAVA Propertymark.
Then follow these 4 steps:
- Visit the property. If it needs work, bring a builder or surveyor to check it out. Photos often hide a lot.
- Download the legal pack and pay a UK solicitor to review it before you bid.
- Get your finance agreed in writing, so you know your real upper limit before you register.
- Write down your maximum bid, including all the costs, and treat it as fixed.
The legal pack is a set of documents the seller’s solicitor prepares before the sale. It usually includes the title deeds, searches, any leases, and the special conditions.
You will find things like short leases, missing access rights, unpaid service charges, and unusual covenants in the legal pack. Each of these becomes your responsibility from the moment the hammer falls.
No one checks the pack for you, and you cannot renegotiate after you win. Paying a solicitor at this stage is the best protection you can get.
Tip: The guide price is just a marketing figure, not a real valuation. Sellers set it low to attract interest. The reserve, or the seller’s confidential minimum, can be higher. Always value the lot yourself using local sold prices.
What happens after the hammer falls?
If you are the highest bidder above the reserve, you must sign the memorandum of sale. This document records the sale and makes it legally binding on both sides.
You will also need to pay the deposit immediately. This is usually around 10% of the price. The special conditions set out the exact deposit amount.
Insurance is important at this stage. In most cases, risk passes to you at exchange. At a traditional auction, this happens when the hammer falls. Always check the special conditions for your lot to confirm when you become responsible, and arrange insurance from that moment.
Completion happens on a fixed date. Under the RICS Common Auction Conditions, this is usually 20 business days after the sale. This is where the familiar 28-day timeframe comes from.
Failing to complete is expensive. The seller can keep your deposit, cancel the sale, and claim for any losses they suffer. For example, on a £250,000 property, you would lose £25,000 immediately, and you could face further claims.
Get your funding agreed before you bid
The costliest auction mistake is bidding before your finance is fully agreed. There is no cooling-off period at a traditional auction. If your funding is delayed after the hammer falls, that is a breach of contract, not just a minor setback.
This is where GoGoProp comes in.
We offer short-term bridging loans, with a lending decision in 24 hours and funds available in as little as 10 days, all handled online. Because our underwriting is asset-based, even non-residents without UK income or a credit file may qualify.
Typical pricing is 1% per month fixed, plus a 2% handling fee. Terms usually range from 3-12 months, and loans can go up to 75% loan-to-value, including lots that need refurbishment.
These timelines rely on having all your documents ready, a prompt property valuation, and a solicitor who responds quickly. Always arrange your finance before you register to bid, not after you win.
Need help securing funds for your auction?
GoGoProp lends under Money Lending Licence No. 1341/2025.
Key takeaways
- At a traditional auction, the fall of the hammer is the exchange, and the contract binds you right away.
- The modern method gives you more time for a non-refundable fee, usually 4% to 5% plus VAT, and this is charged on top of the price.
- The deposit, premium, and completion date are set out in the special conditions for your lot, so make sure to read them.
- Read the legal pack first, because every problem in it becomes yours as soon as you win.
- Budget for fees, refurbishment, and property tax. The 2% non-resident surcharge only applies in England and Northern Ireland.
- Having finance agreed before you bid is a planning tool for investors who move quickly, not a rescue for a deal in trouble.
FAQs
What are the rules for buying a house at auction?
Register in advance with photo ID and proof of funds. The hammer binds you, so you pay the deposit that day and complete about 20 business days later.
How do I bid at a property auction?
Register in advance with photo ID and proof of funds, then bid in the room, online, by telephone or by proxy. Set your ceiling before you start.
What is the difference between the guide price and the reserve?
The guide price is a marketing figure used to attract bidders. The reserve is the seller’s confidential minimum, and it can sit above the guide.
What happens if I cannot complete on time?
You are in breach of contract. The seller can keep your deposit, cancel the sale and pursue you for their losses.
Can I buy a lot that did not sell at auction?
Yes. Unsold lots are usually available straight after the sale, and with the competition gone, there is often room to negotiate.
