A Guide to Buying Property at Auction | UK 2026
A Guide to Buying Property at Auction UK 2026
Property auctions in the UK offer some of the best value opportunities in the market — properties sell at 10-30% below open market value, competition is more transparent than private treaty sales, and exchange happens on the day of the auction with completion typically within 28 days. However, auction buying requires preparation, discipline, and fast-access finance. This guide covers how UK property auctions work, how to prepare, what due diligence to conduct before bidding, and how to arrange bridging finance within the 28-day completion deadline.
How UK Property Auctions Work
Traditional (In-Room) Auctions
The classic format. Properties are listed in a printed catalogue 3-4 weeks before the auction date. Bidding takes place in a room (or online simultaneously) with an auctioneer. When the hammer falls, the winning bidder has exchanged contracts immediately — there is no cooling-off period. A 10% deposit is payable on the day (by banker’s draft or debit card), and completion must occur within 28 days (or as specified in the special conditions of sale). Major London auction houses include Savills, Allsop, Barnard Marcus (part of Countrywide), Strettons, and Auction House London.
Modern Method of Auction (Online)
An increasingly popular alternative. The winning bidder pays a reservation fee (typically £5,000-£10,000 or 4-5% of the price) and enters a 56-day exclusivity period to complete the purchase. This provides more time to arrange finance and conduct due diligence, but the reservation fee is non-refundable if you fail to complete. Modern method auctions are run by platforms like iamsold, SDL Auctions, and many traditional auction houses now offer both formats.
What Types of Property Sell at Auction?
London auctions regularly feature ex-local authority flats in Elephant and Castle, Lewisham, Croydon, and Tottenham at prices significantly below private treaty values. Period houses requiring refurbishment in Hackney, Peckham, Brixton, Walthamstow, and Bow — properties that are unmortgageable in their current condition and therefore cannot be purchased with a conventional mortgage. Commercial premises suitable for permitted development conversion in Woolwich, Lewisham, Ealing, and Acton. Repossessions and probate sales across all London areas — vendors who need a quick, certain sale. Tenanted investment properties in Islington, Bermondsey, Clapham, and Balham — sold with sitting tenants for immediate rental income. Unusual or problematic properties — short leases, title issues, structural problems — that mainstream buyers and agents avoid.
Due Diligence Before the Auction
Legal Pack
Every auction property has a legal pack — available from the auctioneer’s website or solicitor. This contains the title documents, local authority searches, property information forms, special conditions of sale, and any relevant leases, licences, or planning documents. Have your solicitor review the legal pack before the auction — not after. Once the hammer falls, you are committed. Issues discovered after exchange (title defects, restrictive covenants, short leases, missing documents) become your problems.
Property Inspection
Arrange a viewing — most auction properties offer open viewing dates. If the property needs significant works (common for refurbishment projects in Crouch End, Muswell Hill, Stoke Newington, and Finchley), bring a builder or surveyor to estimate costs. Calculate your maximum bid based on the post-works value minus refurbishment costs, finance costs, and your required profit margin.
Finance Arrangement
Arrange your auction bridging loan before the auction — not after. A responsible bidder walks into the auction room with an Agreement in Principle from their bridging lender, confirming the lender is willing to fund the purchase subject to valuation and legal checks. This gives you confidence to bid, and the lender can move quickly after the auction because the preliminary work is already done.
How to Finance an Auction Purchase
Conventional mortgages cannot complete within 28 days — most take 6-12 weeks. This is why bridging loans are the standard financing tool for auction purchases. The process works as follows. Before the auction: you provide the property details to your broker, the lender reviews and issues an Agreement in Principle, and your solicitor reviews the legal pack. On auction day: you bid and win, pay the 10% deposit from your own funds, and exchange contracts. Days 1-3 after auction: the lender instructs a formal valuation. Days 3-10: valuation completed, legal checks finalised, formal offer issued. Days 10-20: solicitor completes the legal process, funds are drawn down. Day 20-28: completion — you take ownership.
At Platinum Global, we arrange fast bridging loans that complete well within the 28-day deadline. We recommend starting the process at least 2 weeks before the auction to ensure everything is in place.
Costs of Auction Buying
The 10% deposit is payable on the day from your own funds — bridging lenders do not fund the deposit. Buyer’s premium — some auction houses charge a buyer’s premium of 1-2% on top of the hammer price. Check the conditions of sale. Stamp Duty Land Tax — payable within 14 days of completion, calculated on the total purchase price (including any buyer’s premium). Bridging loan costs — interest (typically 0.50-0.75% per month), arrangement fee (1-2%), valuation fee, and legal fees. See our guide on understanding interest rates for a detailed breakdown. Auction catalogue fee — some houses charge £20-£50 for the catalogue.
Auction Strategy: Setting Your Maximum Bid
The golden rule of auction buying is to set your maximum bid before walking into the room — and never exceed it. Calculate your maximum by starting with the property’s realistic market value (or post-refurbishment value for projects), subtracting refurbishment costs (with a 15-20% contingency), finance costs (bridging interest, fees, legal, valuation), stamp duty, and your required profit margin (typically 15-20% of GDV for investment, less for owner-occupiers). The result is your maximum bid. If the bidding exceeds this number, let the property go — another one will come along.
What Happens If You Cannot Complete Within 28 Days?
Failure to complete is serious. The vendor can rescind the contract, retain your 10% deposit, resell the property, and pursue you for any loss they suffer (the difference between your price and the resale price, plus costs). Interest charges may also apply from the completion date at the rate specified in the conditions of sale (typically 4-6% above base rate). This is why arranging finance before the auction is essential — not a luxury, a necessity.
Frequently Asked Questions
Can I get a bridging loan agreed before the auction?
Yes — and you should. An Agreement in Principle from a bridging lender gives you confidence to bid and accelerates the post-auction process. We issue indicative terms within 24 hours.
Do I need the full 10% deposit in cash?
Yes. The 10% deposit must come from your own funds — by banker’s draft or debit card on the day. Bridging lenders do not fund the deposit. On a £400,000 property, you need £40,000 available on auction day.
Can I buy at auction through a limited company?
Yes. Limited companies and SPVs can bid at auction. Ensure the company is registered before the auction and that the directors have authority to bid and exchange contracts on the company’s behalf.
What if the property doesn’t reach its reserve?
If the property fails to sell at auction (doesn’t reach the reserve price), it becomes available for private negotiation after the auction. Contact the auctioneer — you may be able to purchase at or slightly above the reserve price, and the 28-day completion deadline still applies.
Does Platinum Global charge a fee?
No broker fee on facilities of £500,000 or above.
Get Auction Finance
Platinum Global Bridging Finance arranges bridging loans for auction purchases across London and the UK. Whether you are bidding on an ex-council flat in Stratford, a refurbishment project in Hampstead, or a commercial conversion in Lewisham, we provide Agreements in Principle before the auction and complete within the 28-day deadline. Contact us at 64 Knightsbridge, London.