Buying at auction is fast, binding, and unforgiving. When the hammer falls, you are contractually committed — no cooling-off period, no renegotiation, no survey contingency. Done right, it is one of the best ways to acquire below-market property. Done without preparation, it is one of the fastest ways to lose a deposit. This guide walks through every step.
Why Properties Go to Auction
Understanding why a property is at auction helps you assess the risk.
Repossessions: Lenders selling mortgaged properties after default. Often below market value, sometimes tenanted, sometimes in poor condition. Timeframes are tight and lenders are motivated to sell.
Probate sales: Estate executors selling quickly to distribute an estate. Properties are sometimes unmodernised and priced to shift rather than to maximise value.
Unusual or unmortgageable properties: Short leases, structural issues, flood risk designations, unusual construction types, sitting tenants. These are the highest-risk lots — and sometimes the highest-reward, if the issue is manageable.
Local authority and housing association disposals: Ex-council properties, land parcels, development sites.
Distressed or complex sales: Disputed ownership, financial difficulty, properties requiring immediate capital investment.
The Two Auction Formats
| Format | Deposit on day | Completion | Reservation fee | Cooling-off period |
|---|---|---|---|---|
| Traditional (unconditional) | 10% on the day | 28 days | No | No |
| Modern method (conditional) | Reservation fee (typically £5,000–£10,000) | 56 days | Yes (non-refundable if you don't proceed) | Usually 28 days to exchange |
Traditional auction is the faster, harder commitment. Contracts exchange the moment the hammer falls. You must have funds, finance, and legal review complete before you bid. The 10% deposit is paid immediately and is non-refundable if you fail to complete.
Modern method of auction (iamsold, SDL Auctions, Auction House) gives slightly more time — 56 days total — but the reservation fee is non-refundable and does not count toward the purchase price. Be clear on the fee structure before registering. Some buyers misunderstand this and treat the reservation fee as a deposit.
Registering and Bidding
Registration: Most auction houses require identity documents (passport and proof of address) and a payment card for the deposit. Register early — some houses require registration 24–48 hours before the auction.
Guide price and reserve: The guide price is indicative only — it may be 10–15% below the reserve price (the minimum the seller will accept). Do not plan your maximum bid around the guide price.
Setting your maximum bid: Work backwards from your fully costed renovation budget. Maximum bid = (post-renovation value × 0.75) minus renovation costs minus purchase costs (fees, stamp duty, finance). This is the investor's approach — adapt as needed for owner-occupier purchases.
Online bidding: Most auctions now support online and telephone bidding. The mechanics are the same — the fall of the hammer (or "Sold" notification online) creates the contract.
The Legal Pack — What to Look For
The legal pack is provided by the seller's solicitor and is available to download before auction day. Reading it is not optional. Your solicitor will also need to review it — here's how the conveyancing process works and what they check.
Title documents: Check the title type (freehold or leasehold), title class (absolute, qualified, possessory), and any title restrictions. Possessory title carries risk — confirm it with your solicitor.
Searches: Check whether searches have been included. If not, your solicitor should order them — or at minimum carry out a search indemnity. Local authority, drainage, and environmental searches can reveal planning restrictions, flood risk, and contamination.
Special conditions of sale: These override the standard conditions. Look for: non-standard completion timeframes, additional fees payable by the buyer, restrictions on use, seller exclusions of liability, and clauses around the condition of the property. Onerous special conditions are common and can be costly.
Overage clauses: Some lots — particularly development land or properties sold by local authorities — include overage (clawback) provisions. If you develop the land and uplift the value, a percentage of that uplift is repayable to the seller for a set period (commonly 10–25 years). Overage clauses can materially affect the viability of development. Have your solicitor highlight any overage before you bid.
Leases and tenancy agreements: If the property is tenanted, review the tenancy type (assured shorthold, assured, or regulated). Regulated tenancies (pre-1989) carry significant restrictions on possession and rent increases.
Survey Before You Bid — Never Skip It
There is no cooling-off period in a traditional auction. Once you have bid and won, you own the property — defects, problems, and all. A RICS Level 3 survey before auction day is not optional for any property with structural uncertainty. At £500–£800, a pre-bid survey is cheap insurance against a £15,000 structural surprise.
Contact the auction house before the viewing day to arrange solo viewing access for a surveyor. Most houses facilitate this for serious bidders.
If a survey reveals significant defects, factor the remediation cost into your maximum bid — or walk away. Do not bid hoping the problem is less serious than it appears.
Financing Your Purchase
Cash: The simplest route. Completion in 28 days (traditional auction) requires funds to be immediately available.
Bridging loan: Short-term secured lending at 0.5–1.5% per month. Used where a conventional mortgage cannot be arranged in 28 days, or where the property is not immediately mortgageable (short lease, structural issues). Exit strategy is critical — bridge to refurbishment then remortgage, or bridge to sale.
| Finance type | Typical cost | Completion timeline |
|---|---|---|
| Cash | None | Immediate |
| Bridging loan | 0.5–1.5%/month + arrangement fee (1–2%) | 5–15 working days |
| Specialist auction mortgage | Interest rate + product fee | 28 days (tight but possible) |
| Standard residential mortgage | Standard rates | Usually too slow for traditional auction |
If using bridging finance, confirm your facility is in place — not just indicative — before bidding. A funding failure after winning a lot results in loss of the 10% deposit and potential further liability.
Typical Auction Fees
| Fee | Who pays | Typical amount |
|---|---|---|
| Buyer's premium | Buyer | 1.5–4% of purchase price (+ VAT) |
| Reservation fee (modern method) | Buyer | £5,000–£10,000 (non-refundable) |
| Legal pack fee | Buyer | £0–£50 (some houses charge) |
| Administration fee | Buyer | £500–£1,500 |
| Stamp duty | Buyer | Standard rates apply |
| Solicitor's fees | Buyer | £800–£1,500 |
Buyer's premium can add several thousand pounds to the effective purchase price. A £200,000 lot with a 3% buyer's premium (+ VAT at 20%) costs £207,200 in purchase costs before solicitor fees or stamp duty.
Risks and Mitigation
| Risk | Mitigation |
|---|---|
| Undisclosed structural defect | Commission pre-bid survey; read legal pack carefully |
| Unmortgageable property | Arrange bridging finance before bidding |
| Onerous special conditions | Instruct solicitor to review legal pack before auction |
| Overage clause limiting development value | Solicit full legal analysis; adjust maximum bid |
| Finance failure post-hammer | Confirm facility (not just DIP) before bidding |
| Sitting tenant preventing vacant possession | Clarify possession terms in legal pack |
| Short lease | Calculate extension premium and add to costs |
Conclusion
Buying at auction rewards preparation and punishes impulse. The properties are real, the opportunities are genuine, and the risks are manageable — if you do the work before auction day. Read the legal pack. Commission a survey. Confirm your finance. Know your maximum bid and stick to it.
Renovate Me helps auction buyers and investors plan the renovation of their new property with a personalised, step-by-step roadmap — so you know exactly what the work will cost before you spend a penny. Start your free renovation plan at Renovate Me.