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Why House Sales Fall Through, and How to Avoid It

Most fall-throughs are preventable with preparation.

Why House Sales Fall Through, and How to Avoid It Residential Property Services in London

Updated October 2026 · Fraser Bond

Selling · Fall-throughs

Keeping a sale together

Chainbreaks
Surveyissues
Mortgagedown-valuation
Slowlegals
In short: Sales most often fall through because a chain breaks, the buyer's mortgage falls through or the lender down-values, a survey reveals problems, someone changes their mind, or the legal work drags on, especially with leasehold flats waiting on management packs. To reduce the risk, check your buyer's position and mortgage in principle, instruct solicitors early, prepare your documents and leasehold pack upfront, be realistic on price, and use an agent who actively progresses the sale.
Chain

Ask about every link and keep in touch.

Finance

Check the mortgage in principle and deposit.

Survey

Fix known issues or disclose them early.

Legals

Order the leasehold pack at the start.

Price

Realistic pricing avoids down-valuations.

Frequently asked questions

How common are fall-throughs?

Common enough that preparation pays.

Can I claim costs if a buyer pulls out?

Not before exchange, usually.

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