At a traditional UK property auction, the winning bid usually creates a legally binding contract when the hammer falls. You will normally pay a deposit of around 10% on the day and must complete within a fixed period, often 20 business days or about four weeks, so your finance needs to be lined up before you bid, not after.
Auctions can be a good way to buy unusual lots, properties needing work or homes that would struggle to sell on the open market. They are also unforgiving. Once you win, you cannot walk away because a survey disappoints or a lender changes its mind, and missing the completion deadline can mean losing your deposit and facing further claims from the seller.
This guide walks through the timeline, the paperwork and the main ways buyers fund a purchase, including when people consider bridging finance for property purchases at auction. It is general information, not financial advice. Any borrowing secured on property is credit, and your property may be at risk if you cannot keep up repayments, so read the terms in full and take independent advice.
How does the auction timeline work?
Most traditional auctions follow the same broad pattern, though every lot has its own conditions.
- Catalogue and legal pack. The auctioneer publishes the lot with a legal pack, which normally includes title documents, searches, any leases and the special conditions of sale.
- Your due diligence. You view the property, have a solicitor review the legal pack and arrange any survey before the auction.
- Auction day. If your bid wins, contracts are exchanged there and then. MoneyHelper notes that the winning bidder pays a 10% deposit on the day, with the balance typically due within 28 days.
- Completion. Under the RICS Common Auction Conditions, if the special conditions do not set a date, completion is 20 business days after the contract date. Your auction's own conditions may set a shorter or longer period.
Under the Common Auction Conditions, the deposit is the greater of any minimum deposit stated by the auctioneer and 10% of the price, excluding any VAT. Some auction houses set a fixed minimum, so a low-priced lot can still need a deposit of several thousand pounds. Buyers' fees and administration charges are usually extra.
Online auctions do not all work the same way. Some use a traditional format where exchange happens when bidding ends; others use different models with reservation fees and longer timescales. Always read the terms for that specific lot.
What should you check before you bid?
- The legal pack: ask a solicitor to look for title problems, short leases, rights of way, restrictive covenants and unusual special conditions such as extra fees payable by the buyer.
- The property itself: view it, and consider a survey. Auction lots are often sold as seen, and problems found after the hammer falls are yours.
- The title register: you can download title registers and plans from HM Land Registry for a small fee to confirm who owns the property and what charges are registered.
- The total cost: price, buyer's premium and fees, Stamp Duty Land Tax (or the Scottish or Welsh equivalent), legal fees, survey costs, finance costs and the money needed for any works.
- Your maximum bid: set it in advance from your numbers, not in the excitement of the room.
How do people fund an auction purchase?
The tight deadline is what makes funding an auction purchase different from a normal sale. These are the main options, compared in general terms.
| Funding route | How it works | Points to weigh up |
|---|---|---|
| Cash | You pay the deposit and balance from your own funds | Simplest and quickest, but ties up a large sum and leaves less in reserve for works |
| Standard residential or buy-to-let mortgage | A long-term mortgage funds the balance after exchange | Usually cheaper over the long term, but the lender's valuation, underwriting and legal work all have to fit inside the auction deadline, and some properties may not meet its criteria |
| Bridging loan | Short-term secured finance funds completion, then is repaid by a sale or a longer-term mortgage | Designed for short timescales and properties that may not be mortgageable yet, but generally costs more than a mortgage and depends on a clear exit plan |
| Commercial or business finance | A company or partnership borrows against the property or other assets | Common for investors buying through a limited company; terms, guarantees and regulation differ from personal borrowing |
When does bridging finance make sense at auction?
Bridging is often considered when the completion deadline is too short for a standard mortgage, or when the property cannot yet be mortgaged, for example because it has no working kitchen or bathroom. The plan is usually to refurbish and then refinance onto a mortgage, or to sell.
The risks are real. Bridging loans are short term, often with interest added to the balance and repaid at the end. If works overrun or the refinance is declined, extension fees and default interest can build up quickly. Before relying on a bridge, it is sensible to:
- Speak to lenders before the auction, not after, and share the legal pack early.
- Ask for the full cost in writing, including arrangement, valuation, legal and exit fees.
- Have a realistic exit, with a time buffer, and a fallback if it fails.
- Remember that you are still liable for the balance if your finance does not complete on time.
Is a bridging loan for an auction regulated?
It depends on the borrower and the use of the property. The FCA's guidance explains that a loan is generally a regulated mortgage contract where it is made to an individual or trustees, secured on UK land, and at least 40% of the land is used, or intended to be used, as or in connection with a dwelling. If you are buying a home to live in, or one for a close family member, you should expect to deal with an FCA-authorised lender or broker, and you can check any firm on the Financial Services Register. A loan to a company for its business, secured on the company's property, falls outside that definition.
A note on lenders in this space
Auction finance comes from banks, specialist lenders and private credit firms. For example, Elara Advisory, a private credit firm registered in the United Arab Emirates that works with UK and UAE businesses, lists auction purchases among the uses for its bridging facilities, which it states range from £75k to £5M on residential, commercial and semi-commercial security. Its website states that it does not lend to consumers, so it is relevant to business and investor buyers rather than people buying a home to live in.
Frequently asked questions
What happens if I cannot complete on time?
You are likely to be in breach of contract. Depending on the conditions, you could lose your deposit and be liable for the seller's losses if the property is resold for less. Speak to your solicitor straight away if you think completion is at risk.
Can I get a mortgage for an auction property?
Sometimes, if the lender can value and approve the property and complete within the deadline. Agree it in principle before you bid and check the lender is comfortable with the timescale and the property's condition.
Do I need a solicitor before the auction?
It is strongly advisable. A solicitor can review the legal pack, flag unusual special conditions and be ready to complete within the deadline.
Can I pull out after the hammer falls?
Not at a traditional auction. The contract is binding from the fall of the hammer, which is why all checks and finance need to happen beforehand.
Sources
- MoneyHelper: Buying a house or flat in England, Wales and Northern Ireland
- RICS: Consumer guide to property auctions
- FCA Handbook: PERG 4.4 What is a regulated mortgage contract?
- FCA Financial Services Register
- GOV.UK: Get information about property and land
General information only, not financial or legal advice. Auction conditions, fees and lending rules vary and can change; always read the legal pack and loan terms in full and take independent advice before you bid or borrow.