Lock-Out Agreements, Can You Stop a Seller Accepting a Higher Offer?

What Is a Lock-Out Agreement?

A lock-out agreement, also called an exclusivity agreement, is a contract between a property buyer and seller under which the seller agrees not to consider, negotiate, or accept any other offer for a defined period of time. In exchange, the buyer usually pays a fee or deposits funds, and commits to using best endeavours to exchange contracts within the agreed timeframe.

The concept sounds appealing: in a system where neither party is legally committed until exchange of contracts, a lock-out agreement appears to offer interim protection against the risk of gazumping (the seller accepting a higher offer from a third party after agreeing a price with you).

The Legal Position in England and Wales

Lock-out agreements are **legally enforceable** in England and Wales, but only within strict parameters established by the courts.

The leading case is **Pitt v PHH Asset Management Ltd [1993]**. In that case, the Court of Appeal confirmed that a lock-out agreement is valid and enforceable provided:

1. It has a **fixed duration**, the exclusivity period must be specific, not open-ended

2. It is **supported by consideration**, something of value must pass from the buyer to the seller (typically a fee or deposit)

3. The terms are **sufficiently certain**, the agreement must clearly identify the property, the parties, and the exclusivity period

Without a fixed duration, a lock-out agreement is unenforceable. Courts will not imply an obligation to negotiate for a "reasonable time" because that would effectively compel a party to enter a contract, which English law does not do.

What a Lock-Out Agreement Can and Cannot Achieve

What it can achieve:

• **Prevent the seller from accepting another offer** during the exclusivity period, if they do, the buyer has a breach of contract claim
• **Commit the seller to negotiating exclusively with the buyer** for the defined period
• **Create a legal remedy** (damages for breach of contract) if the seller gazumps

What it cannot achieve:

• **Force the seller to actually sell to the buyer**, a lock-out agreement is not a contract to sell; it is only a contract not to sell to anyone else for a period
• **Compel the seller to accept the buyer's specific terms**, the seller can refuse to exchange if they genuinely cannot agree terms
• **Protect the buyer if the agreed period expires** and exchange has not occurred
• **Bind the seller's lender** or other parties in the chain

The distinction is important. If a seller signs a lock-out agreement and then accepts a higher offer during the exclusivity period, the buyer has a claim for **damages**, meaning the wasted costs incurred (surveys, solicitor fees, searches) and possibly a loss of bargain element. But the buyer cannot force the original sale to proceed.

In practice, the available damages are usually modest. Pursuing them requires litigation, which is itself expensive and adversarial. Many buyers who are gazumped despite a lock-out agreement simply move on rather than litigate.

How Much Do They Cost and Who Pays?

The fee paid by the buyer under a lock-out agreement varies. Some agreements are entered for nominal consideration (£1); others involve the buyer depositing a more meaningful sum (£1,000–£5,000) which may be:

• **Forfeited** if the buyer fails to exchange within the period (penalising time-wasting)
• **Credited against the purchase price** on successful exchange
• **Returned** if the seller withdraws or breaches the agreement

The drafting of what happens to the deposit matters significantly. Both parties should have their solicitors review the agreement.

When Are Lock-Out Agreements Actually Used?

They are relatively uncommon in standard residential transactions. Solicitors note that the time taken to negotiate and execute a lock-out agreement can itself delay the start of conveyancing. The circumstances where they are most useful:

**1. Competitive bidding situations:** Where a seller has received multiple offers, the winning buyer may request a lock-out to prevent the seller continuing to market while conveyancing proceeds.

**2. Properties with a known problem:** Where a buyer has found the property of their dreams but the transaction will be complex (e.g. a difficult leasehold, planning uncertainty), they may want the security of knowing the seller cannot walk away while they investigate.

**3. High-value transactions:** Where the buyer's costs of abortive due diligence are substantial (professional surveys, structural reports, specialist legal advice), the financial stakes justify the formality of an exclusivity agreement.

**4. Off-market deals:** In off-market negotiations where neither party has the discipline of a formal agent process, a lock-out agreement provides a degree of structure.

Practical Alternatives

Given the limited protection and practical barriers, many buyers and sellers use alternative strategies to reduce the risk of late-stage breakdown:

• **Moving quickly:** The best protection against gazumping is to exchange contracts as quickly as possible. A buyer who exchanges within six weeks of offer acceptance faces minimal gazumping risk.
• **Seller transparency:** Some sellers voluntarily commit to withdrawing from the market after accepting an offer as a matter of good faith, not legally binding, but effective in most cases.
• **Home buyers' protection insurance:** Insurance products that cover abortive conveyancing costs are inexpensive (£50–£100) and provide a practical financial cushion even without legal exclusivity.

The Broader Problem: England Has No Pre-Contractual Commitment

Lock-out agreements are a workaround for a fundamental gap in English property law: offers are not binding. In Scotland, a formal offer (missive) once accepted is legally binding, and gazumping is effectively impossible. Several English government consultations have explored pre-contractual deposit schemes, but none have been legislated.

Until the law changes, buyers in England remain exposed to withdrawal at any stage before exchange, and lock-out agreements offer partial but imperfect protection.

Property Passport UK helps buyers move faster through due diligence by providing instant access to title information, EPC data, flood risk, and sold price history, reducing the time between offer and exchange, and with it the window of gazumping risk.