Buying a Property at Auction, The Mortgage Implications

Property auctions in the UK have grown massively over the past five years, partly because online auctions opened the market beyond traditional in-room events, and partly because rising mortgage rates pushed more distressed and unmortgageable property into auction sales. They can produce real bargains. But the mortgage timing is unforgiving, and a buyer who turns up unprepared can find themselves committed to a property they can't actually fund.

How property auctions work

The basic mechanics are simple: properties go through a public bidding process. The winning bidder is contractually committed, once the hammer falls (or the digital equivalent closes), you've exchanged. There's no cooling-off, no time to think, no chain. You pay a 10% deposit immediately and you complete according to the auction's timeline.

Two formats now dominate: traditional auctions (in-room or live online) and the newer modern method of auction. The completion timelines are very different.

Traditional auction: the 28-day rule

Under a traditional auction:

• Winning bid = legally binding exchange at the fall of the hammer.
• 10% deposit payable on the day (by bank transfer or banker's draft).
• 28 calendar days to complete, pay the remaining 90% and take ownership.
• Fail to complete = forfeit your 10% deposit and potentially be sued for the difference if the property is later sold for less.

Why 28 days is brutal for mortgages

A standard residential mortgage application typically takes 6-8 weeks from application to completion, much longer than 28 days. So traditional auction purchases largely happen via:

If you're a standard residential buyer with a fully approved mortgage already in place, like, the full offer issued, lender ready to go, conveyancer briefed, you can sometimes complete a traditional auction purchase on a mortgage. It's tight. Most people use bridging.

• Cash buyers, straightforward, fast.
• Buy-to-let mortgages, sometimes faster than residential, but still tight on 28 days.
• Bridging finance, completes in 7-21 days. Most common funding route for auction.
• Refurb mortgages for properties needing work.

Modern method of auction (MMoA)

The modern method splits the timeline: instead of a 28-day completion, you get:

• 28 days to exchange (this is the deadline to get your mortgage offer in place).
• A further 28 days to complete after exchange.
• Total ~56 days from winning bid to completion, much more workable for a standard residential mortgage.

Why properties end up at auction

Not every auction property is a bargain, some have real issues. Common reasons properties go to auction:

• Distressed sales, repossessions, executor sales, divorce sales where speed matters.
• Unmortgageable on standard terms, no kitchen, no bathroom, short lease, structural issues, cladding problems.
• Below-market-value pricing deliberately to drive competition (the seller hopes the bidding pushes higher than they'd have got via an agent).
• Legal complications, disputed boundaries, missing title information, restrictive covenants.
• Land or commercial property that doesn't suit the standard agent route.

Due diligence BEFORE you bid

Auctions are caveat emptor, buyer beware. There's no scope to renegotiate after the hammer. Everything you need to know about the property must be known BEFORE you bid. So:

• Download the legal pack, auction sellers prepare a legal pack containing title, special conditions, searches, leases (if leasehold), planning, energy certificates etc. Have a solicitor read this BEFORE the auction.
• View the property in person, pictures hide a lot.
• Get a survey done if possible, yes, even pre-auction. A Level 2 home survey for £400-£600 can save you a £30,000 mistake.
• Confirm mortgage availability with a broker before bidding. If a lender won't lend on this property, you need to know before you bid.
• Check for special conditions, auction packs sometimes contain buyer's fees (3-5% of the purchase price ON TOP of the price), or unusual completion requirements.
• Set your maximum bid in advance and stick to it. Auction adrenaline drives buyers above their limit regularly.

Funding the deposit and the balance

On the day, you need:

If you're using bridging, your bridging lender often provides the 10% deposit too. If using a mortgage on the modern method, your conveyancer and lender will manage the 90% balance payment from the mortgage funds at completion.

• The auction deposit on the day (10% of the winning bid + auction buyer's premium if applicable, paid same day).
• Your funding for the balance in place to hit the completion deadline (28 or 56 days depending on auction type).
• Solicitor instructed and ready, they have to start the day after the auction.

Is auction-buying right for you?

Auctions can be excellent for:

Auctions are usually wrong for:

• Right for: cash buyers, BTL landlords with bridging in place, refurbishment projects, buyers comfortable with risk and tight timelines.
• Wrong for: standard residential buyers who've never bought before, anyone with a chain on the other side, anyone who hasn't reviewed the legal pack thoroughly with a solicitor.

Property auctions can be a great route into a specific deal, especially for cash buyers, BTL landlords, and renovators. For standard residential buyers, they require more preparation than a regular purchase: legal pack reviewed, survey done, funding confirmed, broker on standby. If you're considering an auction purchase, talk to Debbie at DS Financial early, there's a lot we can do to get you mortgage-ready (or arrange bridging) before you bid.

General information, not financial advice. Your home may be repossessed if you do not keep up repayments on your mortgage.

Sources: RICS, Property auctions, MoneyHelper, Buying at auction, GOV.UK, Buying property guides.