Buying at auction as an investor: the legal pack is the whole deal
At auction you buy the property you did not read about, at a price you cannot renegotiate, on terms you cannot change.
An auction sale is unconditional from the moment the hammer falls, or from the moment the online timer expires. There is no cooling-off period, no opportunity to renegotiate after a survey, and no mortgage to arrange afterwards unless you have already put finance in place. Exchange and completion are legally simultaneous in the contract you have already agreed to.
That structure is exactly why the discount exists, and exactly why the preparation has to happen before you bid rather than after you win.
The legal pack, and what to look for in it
The legal pack is the contract, the title, the searches and any special conditions. Read it before you view the property, not after. The special conditions are where auctions differ from private treaty sales, and where obligations that would normally be negotiated are imposed.
- Special conditions of sale, which can impose obligations to pay the seller's costs, to complete on a fixed date, or to accept the property in its current state with no recourse
- The title register: check the tenure, the class of title, and any restrictive covenants or rights of way
- Lease details on leasehold lots, particularly the unexpired term and the ground rent review clause
- Local authority searches, especially for planning enforcement notices and road schemes
- Any tenancy agreements, and whether the tenant is in occupation and on what terms
- Whether the property has been served with any notices — improvement, prohibition, or an EPC enforcement notice
The deposit and the timetable
You pay a deposit on the fall of the hammer, typically 10% of the purchase price, with the balance due on a completion date fixed in the contract — commonly 28 days, sometimes 14 for a faster sale. That deposit is at risk if you fail to complete, and the seller can also sue for the shortfall if the property is resold for less.
Because the completion window is short, mortgage finance is impractical unless it is already arranged and the lender is willing to work to that timetable. This is the structural reason auction is dominated by cash buyers, and the reason a mortgage-dependent buyer should look at the conditional auction and modern method of auction formats instead.
Where investors actually win and lose
The winning bids at auction are rarely bargains. Competitive lots sell for what they are worth, and the room has already priced the obvious defects. The money is made in the lots nobody else has properly read — where the legal pack contains something that puts others off but which you have established is cheap to resolve.
Conversely, most losses come from the same handful of causes: an unread special condition, a lease with 60 years remaining that nobody noticed, a tenant who will not leave, or a defect visible to a surveyor but invisible in the photograph. Every one of those was in the pack before the auction started.
Common questions
- Can I get a survey before an auction?
- You can, and on anything other than a cheap property you should. A surveyor can usually inspect within a week or two if you instruct them as soon as the legal pack is available. What you cannot do is make the survey a condition of the sale — by bidding you accept the property as it stands, whatever the survey later says.
- What is a conditional auction or modern method of auction?
- It is a hybrid where the buyer exchanges immediately but gets a longer completion window — typically 28 to 56 days — in exchange for a non-refundable reservation fee, often 4–5% plus VAT, usually paid on top of the price by the buyer. It suits buyers who need a mortgage, but the reservation fee is a real cost that changes the arithmetic, so add it before deciding a lot is a bargain.