Freehold: Exchange of Contracts
A conveyancing file can sit dormant for weeks — searches trickle in, enquiries go back and forth, a mortgage offer eventually lands — and then, in the space of a single phone call, the entire transaction snaps into an irrevocable state. That moment is exchange of contracts. Everything this topic covers, from how the contract must be drafted to how the phone call itself is conducted, exists to manage what happens the instant that snap occurs: who now bears the risk if the roof leaks, who can walk away, and who is liable if a solicitor gets it wrong.
Land is treated differently from almost every other kind of property you might contract to sell. A contract for the sale of land must comply with section 2 of the Law of Property (Miscellaneous Provisions) Act 1989. This is not a formality you can shrug off — a land contract that fails to meet section 2 is void, not merely unenforceable.
Section 2, LP(MP)A 1989 — the three requirements A land contract must (1) be in writing, (2) incorporate all the express terms the parties have agreed, and (3) be signed by or on behalf of each party.
Two features of this deserve emphasis because they explain later rules. First, section 2 requires all express terms to be incorporated — you cannot have a side agreement about, say, the completion date that lives outside the written contract; if it is not in there, in principle it is not a term at all. Second, where the parties exchange contracts (as almost all residential and commercial sales do), the writing requirement is satisfied by each identical part, one signed by the seller and one by the buyer, rather than by a single document signed by both. That is precisely why the ceremony of "exchange" exists: two physically separate signed documents have to come together and match before the deal is legally complete.
It is worth flagging what a land contract is not: it does not need to be a deed. That formality is reserved for the document that actually transfers the legal estate — the TR1 — executed on completion. The contract merely creates a binding obligation to complete the transfer later; the deed is what carries out the transfer itself.
Nobody drafts a residential sale contract from scratch. Instead, solicitors incorporate a published set of boilerplate terms and then bolt on the details specific to their transaction. For residential freehold (and leasehold) sales, that boilerplate is the Standard Conditions of Sale, currently in its Fifth Edition, 2018 Revision. Commercial property transactions use a sibling document with a near-identical structure but commercial-specific content: the Standard Commercial Property Conditions. Knowing which set applies to a given transaction is itself a basic competence check — using residential conditions on a commercial deal, or vice versa, is the kind of error that immediately signals a solicitor has not engaged with the file.
A contract does not pick up these conditions automatically; they must be pulled in by express reference, typically a line in the special conditions or particulars of sale stating that the Standard Conditions (specifying the edition) are incorporated. Once incorporated, the standard conditions supply the entire default architecture of the deal — deposit, risk, completion mechanics, remedies for default — so that the solicitors only need to negotiate and record what is different about this particular sale.
That is the role of special conditions: transaction-specific terms, drafted by the seller's solicitor, that sit alongside the standard conditions and address whatever is unique to this sale — most commonly the completion date, the deposit amount (if it departs from the standard figure), any chattels included in the sale (curtains, white goods, garden furniture), and any variation to the risk position. Because special conditions are bespoke and standard conditions are generic, the drafting convention gives special conditions priority: where the two conflict, the special condition prevails. Think of the standard conditions as the default settings on a piece of software, and the special conditions as the user's manual overrides — the override always wins.
A deposit performs two jobs at once: it is a part-payment of the price, and it is a guarantee of the buyer's good faith, at risk if the buyer walks away after exchange.
Standard Condition 2.2.1 fixes the default deposit at 10 per cent of the purchase price. This figure is deliberately substantial — a buyer who is prepared to lose 10 per cent of the price has a strong incentive not to default. Because it is a default, the parties can agree something lower, but only by express agreement recorded as a special condition; silence means 10 per cent applies. A reduced deposit is most often negotiated for a first-time buyer or anyone with limited available funds, since raising a full 10 per cent in cash before a mortgage advance arrives can itself be a barrier to the purchase going ahead.
Where the deposit actually sits matters just as much as its size. Under the default position, the seller's conveyancer holds the deposit as stakeholder: the money belongs to neither party until completion, at which point it is released to the seller as part of the purchase price. The alternative is for the seller's conveyancer to hold the deposit as agent for the seller, meaning the seller can draw on the funds immediately — commonly to help fund the deposit on their own onward purchase further up a chain. That convenience comes at the buyer's cost: if the sale falls through and the money has already gone into the seller's hands, the buyer is exposed to the seller's insolvency or simple refusal to repay, whereas a stakeholder holds neutral funds that are comparatively protected.
Whichever basis applies, once the deposit reaches the solicitor it is client money, and it must be held in the firm's client account in accordance with the SRA Accounts Rules — a compliance obligation that runs alongside, not instead of, the contractual stakeholder/agent analysis. The Standard Conditions also dictate how the deposit must be paid: by an electronic method of payment from a conveyancer's account at a clearing bank, closing off the possibility of cash or a client's personal cheque landing directly with the other side.
| Basis of holding | Who can use the funds before completion | Buyer's exposure if the sale collapses |
|---|---|---|
| Stakeholder (default, SC 2.2.1) | Neither party | Low — money is neutral, held for both |
| Agent for seller | Seller (e.g. to fund an onward purchase) | Higher — money may already be spent |
This is the conceptual heart of the topic, and it is worth stating as starkly as the rule itself does.
Standard Condition 5.1.1: risk in the property passes from the seller to the buyer on exchange of contracts — not on completion.
Legal ownership does not move until completion, but under the standard conditions, risk moves at exchange. If a pipe bursts, a tree falls on the roof, or fire damages the property the week after exchange but before completion, that loss falls on the buyer, even though the seller is still, on paper, the legal owner. This is a trap for the unwary, and it is precisely why the buyer's solicitor's job includes a very concrete, non-negotiable task: ensure the buyer has buildings insurance in place with effect from the moment of exchange, not from completion. Leave that gap open and the client could exchange contracts on a Tuesday and lose the (uninsured) house to fire on the Wednesday, while still being contractually bound to pay full price for it.
Correspondingly, the seller is under no obligation to the buyer to keep buildings insurance running after exchange — the standard conditions simply do not impose one, because risk is no longer the seller's problem. That said, sellers are not left entirely without reason to think about insurance: if the seller lets a property under a lease that contractually obliges them to insure against loss, that lease obligation survives exchange untouched, and the seller's solicitor should also check with the client, before completion, whether the seller's own contents or liability insurance ought to continue even though risk in the property itself has passed.
Because the standard position can feel harsh on a buyer taking on risk for a property they do not yet own, the parties are free to vary it by special condition, most often by keeping risk with the seller until completion. That variation is unusual, however, and can be genuinely difficult to negotiate in a chain transaction, where the seller is simultaneously a buyer further up the chain and has every incentive to pass risk on as early as possible themselves. A gentler compromise sometimes used is a special condition requiring an existing seller's insurance policy to continue in force for the buyer's benefit pending completion, so the buyer gets protection without the seller giving up the general risk-passes-on-exchange position entirely.
Risk is not the only thing that can shift before completion — occupation can too. Where the standard conditions permit a buyer to move in before completion, that buyer occupies as a licensee, never as a tenant. This is a deliberately engineered distinction: a tenancy could hand the buyer statutory security of tenure, entrenching them in the property even if the sale later collapsed — an outcome no seller would accept. A licence carries no such protection. In exchange for early occupation, the buyer must pay for the use and occupation of the property, and unless the contract says otherwise, the default position remains vacant possession on completion — the seller must be out, and the property empty of the seller's possessions and any occupiers claiming through the seller, by the point the sale finishes.
Everything above depends on identifying the precise moment exchange happens, because before that moment nothing is binding and after it, everything is.
Signing an individual part of a contract commits nobody. A land contract only becomes binding once contracts are exchanged — until then, either party can walk away without being in breach, however far negotiations, surveys, or mortgage arrangements have progressed. This is why buyers are routinely warned not to book removal vans or give notice on a rented flat before exchange: right up to that point, the deal can evaporate at no legal cost to either side. The instant contracts are exchanged, that freedom disappears entirely — neither party can withdraw without being in breach of contract, and the remedies discussed below become available.
Because the consequences are so severe and immediate, a solicitor must have clear authority from the client before exchanging on their behalf. Exchanging without express authority is not a minor procedural slip — it exposes the solicitor to a professional negligence claim, because the client is bound to a transaction they may not have actually approved at that moment (perhaps the mortgage offer had not yet arrived, or the client had last-minute doubts). Before authorising exchange, a solicitor should therefore work through a short but essential checklist: has the client signed the contract, are the deposit funds available, is the completion date agreed, and are any related mortgage offer and search results satisfactory? Skipping this checklist to save time is exactly the kind of shortcut that produces negligence claims.
Contracts can be exchanged in person, by post, or remotely — by telephone, fax, or email — using an agreed method. Postal exchange has its own timing rule worth knowing precisely: it takes effect when the second solicitor to receive the counterpart posts their own signed part in return — exchange is not complete merely because both parts exist somewhere in the postal system; it needs that final act of posting back.
Remote exchange by telephone is the far more common method in modern practice, and because a phone call leaves no paper trail of its own, the Law Society devised three formulae — A, B, and C — giving solicitors a standardised script and a matching set of professional undertakings so that "exchange happened at 3:14pm on the call" can be treated with the same certainty as a signature on paper.
| Formula | When used | Mechanics |
|---|---|---|
| A | One solicitor already holds both signed parts before the call | That solicitor dates both parts, inserts the completion date if not already stated, and undertakes to send the other part to the other solicitor that day |
| B | Each solicitor holds only their own client's signed part | Each solicitor confirms their part matches the other's (disclosing any amendments made), then undertakes to hold their part to the other's order and post it that day |
| C | A chain of linked transactions exchanging simultaneously | Each solicitor holds their own client's part and agrees to release it only when notified, so every transaction in the chain exchanges together, within an agreed time limit that can be extended by agreement |
Formula B's disclosure requirement deserves a second look: because each solicitor is confirming, sight-unseen, that their part is identical to the other's, any amendment made to one party's part must be flagged so the other solicitor can genuinely verify the parts match before committing to exchange — without that disclosure, the whole formula's premise collapses.
What all three formulae share is that the undertaking given over the phone is professionally binding even though it is entirely informal — there is no signed document at that moment, only spoken words, yet a solicitor who fails to honour it (say, by not posting the part that day) has breached a solicitor's undertaking, which is a professional conduct matter regardless of the reason for the breach. That is a strict, no-excuses obligation, distinct from ordinary contractual liability.
The formulae were designed for a paper-and-telephone world, and the Law Society has published a draft Code for signing and exchanging property contracts intended to modernise the system for electronic signatures and digital contracts. The draft Code introduces an Immediate Exchange Protocol, intended to replace Formulae A and B, and a Release of Contracts Protocol, intended to replace Formula C — the same underlying logic (immediate exchange versus chain-release exchange) carried over into a framework built for e-signed documents rather than physically posted parts.
The completion date is simply the date stated in the contract (or particulars) by which the sale must complete. Two things are worth holding in mind about it. First, it can be extended by written agreement between the parties before it falls due — nothing about the standard conditions locks the parties rigidly to the original date if both sides agree to move it. Second, and more subtly, under the standard conditions time is not automatically "of the essence" of that date at the point of exchange. In plain terms: missing the completion date by a day or two is not, by itself, a repudiatory breach that lets the other side tear up the contract — it is treated as an ordinary breach sounding in damages, not a fundamental one.
Time can be made of the essence in two ways: by an express special condition at the outset, or later by one party serving a notice to complete once the other has already failed to complete on the contractual date. A notice to complete is the mechanism for converting an ordinary delay into a hard deadline.
Standard Condition 6.8: once a notice to complete is served, completion must take place within ten working days, excluding the day of service — and service makes time of the essence of that new, revised date.
Failing to complete by that revised ten-working-day deadline is a repudiatory breach — a fundamental breach that entitles the innocent party to treat the contract as at an end and pursue remedies, rather than merely claiming damages for delay. One immediate practical consequence attaches specifically to an under-deposited buyer: if a buyer paid less than the full 10 per cent deposit, they must pay the balance up to 10 per cent immediately on receipt of a notice to complete — the notice does not just accelerate the completion date, it also closes off any grace on the deposit shortfall.
The remedies that follow a failed notice to complete run in different directions depending on who is at fault.
- If the buyer fails to comply, the standard conditions let the seller forfeit and keep the deposit (plus any accrued interest), resell the property, and/or claim damages for the buyer's breach — the seller is not limited to a single remedy and can pursue several.
- If the seller fails to comply, the buyer may seek the return of the deposit with accrued interest, damages, or specific performance (forcing the sale to go ahead) — again, not mutually exclusive first resorts, but the buyer's toolkit for the seller's default.
The forfeited deposit is not always the final word, however. Section 49(2) of the Law of Property Act 1925 gives the court a discretion, in an action for the return of a deposit, to order the deposit repaid to a defaulting buyer despite forfeiture. This is a genuine judicial discretion, but it is a narrow one in practice: courts exercise it only where the justice of the case requires it, and the accepted starting point is that a deposit forfeited on a buyer's default should not normally be repaid simply because the sale failed to complete. Section 49(2) relief is the exception a defaulting buyer might reach for, not a routine safety net — a buyer cannot assume that losing the deposit is reversible just by asking a court to look at it again.
Finally, it is worth remembering the broader design philosophy running through all of this. The Standard Conditions of Sale are deliberately drafted to balance the interests of buyer and seller in an ordinary residential transaction — the 10 per cent deposit, the risk-on-exchange rule, the notice-to-complete mechanism, and the layered remedies are not arbitrary technicalities but a considered allocation of risk and consequence between two parties who, until exchange, could each have walked away for free, and who, from the moment the phone call ends or the second envelope is posted, cannot.