Prepare the sale before finding the next home
Choose an estate agent and conveyancer, gather title papers, guarantees, planning documents and service records, and complete property forms carefully. If the home is leasehold, request the management information early because it can take time.
Ask the lender or broker what can be borrowed and how the existing mortgage will be repaid or moved. An early budget should include the estate-agent fee, legal work, tax, removals and any mortgage charge.
Give both estate agents the same clear account of the chain. Conflicting updates waste time and reduce confidence. If a new problem arises, tell the conveyancer whose work it affects before asking the whole chain to react.
Understand where you sit in the chain
A chain links transactions because one sale funds another purchase. Ask whether each party has found a property and whether the top and bottom are complete. The agent can chase progress, though they cannot disclose private legal or financial information.
Chains change. A buyer can lose a mortgage or a seller can withdraw before commitment. Keep updates factual and avoid making non-refundable arrangements because somebody says the chain “looks ready”.
The sale proceeds usually provide the purchase money
Your conveyancer prepares statements for both files, repays the old mortgage and applies the remaining equity to the purchase. Ask how the deposit at exchange will work, particularly if most of your money is tied up in the property being sold.
Tell the conveyancer about every linked transaction and any separate contribution. Verify bank details before sending a balance. Money moving through a chain can make completion timing less predictable.
Porting a mortgage usually means applying again and meeting the lender's current checks. An existing rate may be transferable without guaranteeing that the lender will accept the new property, loan amount or timetable.
Exchange dates must join up
Most linked sellers and buyers exchange across the chain with one completion date. A proposed gap may create temporary accommodation, storage and insurance issues. Do not agree one side without understanding what it does to the other.
If you break the chain by selling first, work out where you will live, how belongings will be stored and what happens if the next purchase takes longer. The flexibility can help, but it has a real cost.
Keep both properties correctly insured
Do not cancel the old policy when your sale exchanges if you remain responsible until completion. The new home may also need buildings cover from exchange. Tell the insurer about the dates and ask how any overlap is arranged.
Contents may be in the old home, a removal van, storage and the new address within a short period. Check the policy and removal firm's terms instead of assuming one arrangement covers every stage.
If the purchase price changes after survey, tell the sale-side figures too. A reduction may affect borrowing, deposit funds and the amount available for tax or repairs even though your own sale price is unchanged.
Plan completion day around uncertainty
Your sale normally completes before its money can fund the purchase. Keys for the new home may therefore be released later in the day. Tell removers that you are in a chain and ask how waiting time is handled.
Keep medicines, documents, chargers, food and overnight essentials with you. If one transaction fails to complete on the agreed day after exchange, contact the conveyancer immediately and preserve records of additional costs.
Agree who will hold keys for both properties and how they will be released. Keep the old and new sets clearly separated. A chain-day delay is difficult enough without keys travelling in the wrong removal vehicle.
Check what happens to any buildings or contents policy paid annually when each address changes. A refund, adjustment or administration charge may affect the final figures, so obtain the answer directly from the insurer.