What are the steps involved in selling a home when there's an outstanding mortgage?

Selling a home with an outstanding mortgage is a process of transferring the property while arranging for the secured loan to be settled as part of the transaction. The essential sequence is to appoint a conveyancer, establish the exact financial position, prepare the property and legal information, find a suitable buyer, exchange contracts and complete only when the mortgage settlement and other completion amounts have been properly accounted for.

1. Review your financial position before putting the property on the market. Ask your lender for the current balance, the date up to which any figures apply, and details of any charges connected with repaying the loan. Check whether the mortgage is in one name or joint names, and whether there are other secured loans or restrictions registered against the property. If you are selling because of arrears, a divorce, probate or a potential repossession, obtain legal or debt advice at an early stage. A sale does not automatically stop enforcement action, so the lender should be kept informed where financial difficulty is involved.
2. Instruct a conveyancer. Your solicitor or licensed conveyancer handles the legal work and communicates with the mortgage lender. They will ask you to complete property information forms, provide identification and supply documents such as guarantees, planning permissions, building regulation certificates and any relevant tenancy information. If the property is leasehold, additional information may be required from the freeholder or managing agent, including service-charge accounts, ground-rent details and the remaining lease term.
3. Confirm whether the expected sale price is sufficient. Obtain a realistic valuation and compare it with the amount needed to settle the mortgage and sale costs. The calculation should allow for conveyancing fees, selling-agent fees if applicable, removal costs, leasehold administration charges and any other agreed expenses. Do not rely only on the mortgage balance shown on an online account: interest and transaction-specific charges can alter the final amount.
4. Prepare the property and marketing information. Gather title documents and certificates before marketing begins, as missing paperwork can delay replies to the buyer’s solicitor. An Energy Performance Certificate is normally needed for a property being marketed for sale unless an exemption applies. Be accurate about alterations, boundaries, disputes, flooding, notices and known defects. Concealing an issue can lead to renegotiation, delay or a claim after completion.
5. Choose the sale route and assess the buyer’s position. A traditional sale through an estate agent may expose the property to a wider market but can involve a chain and a longer period before completion. A direct sale to a cash property buyer may remove the buyer’s need for mortgage finance and can be considered where a chain-free transaction is important. Whichever route is used, check the proposed price, the buyer’s funds, the contract terms and any conditions before committing to the transaction.
6. Give the lender and conveyancer the proposed sale details. Once an offer is accepted, provide the agreed price and anticipated completion date. The conveyancer can then request a formal redemption statement from the lender for the relevant date. This statement normally sets out the amount required to clear the mortgage, including interest calculated to a specified day and any applicable fees. Because the figure can expire, a later completion may require an updated statement.
7. Progress the legal work before exchange. The buyer’s solicitor will raise enquiries and arrange searches, while your conveyancer checks the title and answers questions using the information you have supplied. Resolve issues such as missing documents, restrictions on the title, boundary disputes or unapproved building work before exchange where possible. Your conveyancer should also confirm how the mortgage will be discharged and whether any other charge needs to be paid from the proceeds.
8. Review the completion statement. Before contracts are exchanged, ask for a written breakdown showing the sale price and deductions. It should identify the mortgage redemption figure, legal costs, estate-agent charges, taxes or adjustments where applicable, and the amount expected to be paid to you. If the estimated proceeds do not cover the required deductions, discuss the shortfall with your conveyancer and lender before exchange. Do not assume that a lender will write off the difference.
9. Exchange contracts only when the arrangements are ready. Exchange makes the sale legally binding and fixes the contractual completion date. Before this point, confirm that you understand the contract, the fixtures and fittings included, the vacant-possession requirements and the consequences of failing to complete. If you are buying another property, make sure the linked transactions and funding arrangements have been checked by your conveyancer.
10. Complete the sale and settle the secured borrowing. On completion, the buyer’s solicitor transfers the purchase money to your conveyancer. The conveyancer uses the relevant funds to settle the mortgage and any other agreed charges, then transfers the remaining balance to you or applies it towards a related purchase. The lender’s charge is removed from the title through the conveyancing process, allowing ownership to pass without the old mortgage remaining secured against the property.
11. Keep the final records. Request confirmation that the mortgage has been redeemed and retain the completion statement, redemption confirmation and evidence of the funds received. Check your lender’s account afterwards to ensure the balance is shown as settled. If the property is jointly owned, divorced or subject to probate, keep the records available for the other owners, executors or advisers who may need them.

If the sale price is lower than the settlement figure, the transaction usually cannot complete without an additional arrangement. You may need to contribute the difference, negotiate an approved repayment plan with the lender or obtain specific consent for the sale. The lender’s approval should be secured in writing before exchanging contracts. Taking out further borrowing to cover the shortfall can create additional costs and should be considered only after obtaining appropriate financial advice.

A mortgage does not normally prevent a sale, but it makes accurate coordination essential. The most common sources of delay are incomplete property information, an expired redemption statement, unresolved title problems and a gap between the sale proceeds and the amount required to settle all liabilities. Starting the legal work early and checking the completion figures carefully helps identify these issues before the transaction becomes binding.