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Introduction

Commercial property auction day is often the culmination of several weeks of preparation and marketing. For sellers, it can be both exciting and nerve-racking, as competitive bidding determines the final sale price. Understanding how the day operates will help you feel more confident about the process and what happens once your property goes under the hammer.

What to Expect on Auction Day

Although sellers are not required to attend the auction in person, many choose to do so. Being present allows you to observe bidding activity and gain insight into buyer behaviour. However, your auctioneer and solicitor will manage the legal process whether or not you attend.

Your property will appear in the Order of Sale, which lists the sequence in which lots are offered. Any last-minute updates — such as revised guide prices, withdrawn lots or legal amendments — will be included in the addendum, which bidders review before the auction begins.

At the start of proceedings, the auctioneer will explain the bidding process, legal obligations and general conditions before introducing the first lot.

1. Modern auction formats in 2026

By 2026, commercial property auctions may take place through several formats:

  • Traditional in-room auctions
  • Hybrid auctions combining live and online bidding
  • Fully online auctions with timed bidding windows
  • Remote telephone or proxy bidding

Regardless of the format, the legal position for sellers remains broadly the same once a property is sold.

2. When your property goes under the hammer

When your lot is announced, the auctioneer may confirm:

  • Any updates to the legal pack
  • Changes to guide price or reserve
  • Special conditions of sale
  • Known buyer interest

Bidding will then begin.

If bidding reaches or exceeds the reserve price, the auctioneer will confirm the sale when the hammer falls (or when the online auction timer closes). This is the moment a legally binding contract is formed between buyer and seller.

There is no opportunity for either party to withdraw after this point without legal consequences.

3. What happens immediately after the sale

Once the property is sold:

  1. The successful bidder provides identification and solicitor details.
  2. A deposit — usually 10% of the purchase price — is paid immediately.
  3. The memorandum of sale is signed.
  4. Contracts are formally exchanged.
  5. Documentation is forwarded to both solicitors.

Completion normally takes place within 20 to 28 working days, unless different terms were agreed in advance.

Your solicitor will then manage the process through to completion and transfer the sale proceeds to you, less any agreed fees.

4. If the property does not reach the reserve price

If bidding fails to meet the reserve price, the property is classified as unsold.

This does not necessarily mean the sale has failed.

In many cases, interested bidders remain engaged after the auction. The auctioneer will typically:

  • Approach the highest bidder
  • Contact registered interested parties
  • Negotiate post-auction offers
  • Attempt to agree a sale shortly afterwards

A significant proportion of auction properties that fail to sell on the day are successfully sold within days or weeks following negotiations.

5. Post-auction negotiations

If your property remains unsold, you still retain control over pricing decisions.

Options may include:

  • Negotiating with interested bidders
  • Revising the reserve price
  • Re-entering the property into a future auction
  • Marketing through alternative sales channels

Your auctioneer will advise on the most effective strategy based on market feedback.

6. Seller responsibilities after exchange

Once contracts are exchanged on auction day, you must:

  • Maintain property insurance until completion
  • Comply with contract terms
  • Allow completion to proceed within agreed timelines

Failure by the buyer to complete may allow you to retain the deposit and pursue damages, depending on contract conditions.

Summary

Auction day represents the decisive stage in selling commercial property through auction. If the reserve price is achieved, contracts are exchanged immediately and completion typically follows within a short timeframe. Even where a property does not sell during bidding, strong buyer interest often leads to successful negotiations afterwards.

Understanding how the process works — from bidding to exchange and completion — helps ensure a smoother experience and allows you to make informed decisions throughout the sale.