A full mortgage application typically takes 2–4 weeks from submission to receiving a formal offer, for a straightforward employed applicant buying a standard property with clean credit. Some lenders with automated underwriting can issue an offer in a matter of days, and 2026 broker data shows averages as fast as around 11 days. Complex cases — self-employed income, adverse credit, or unusual properties — typically take 4–8 weeks. The biggest factor is how complete your application is when submitted, as underwriting can’t begin until the lender has everything.

Once the valuation is complete and satisfactory, a formal mortgage offer typically follows within 2–4 weeks, though straightforward cases can be quicker as underwriting often runs alongside the valuation rather than after it. Desktop and automated valuations can complete within 48 hours, while physical valuations take 1–2 weeks. A satisfactory valuation doesn’t guarantee an offer — the lender must also be happy with underwriting, your credit and affordability — but once both are clear, the offer usually follows promptly.

From application to getting your keys typically takes 10–16 weeks, and government figures suggest around 5 months on average from having an offer accepted to completion. The mortgage offer itself usually arrives within 2–4 weeks, but the legal conveyancing process (searches, enquiries, title checks) takes 8–16 weeks and runs alongside, generally setting the overall pace. Being in a chain, buying a leasehold flat, or complications at any stage can extend this. Chain-free purchases and well-prepared applicants tend to move fastest.

An agreement in principle (also called a decision or mortgage in principle) is usually very quick — often issued the same day you apply, sometimes within minutes, as it’s based on a soft credit check and the information you provide rather than full document verification. Most are valid for 30–90 days. It’s worth getting one before you start house-hunting, so you know your budget and can move quickly when you find a property. Some lenders renew an AIP automatically if your search takes longer than the validity period.

The most common causes are missing or incomplete documents (underwriting can’t start until the lender has everything), a down-valuation requiring renegotiation, slow conveyancing or property enquiries, chain-related delays where everyone waits on one party, and complex income or credit needing extra checks. Delays don’t always signal a problem — much is normal due diligence — but if several weeks pass with no update, or the same documents are requested repeatedly, it’s worth asking your broker or lender to check the status. Responding to queries quickly is the best way to keep things moving.

Gather all your documents before applying (ID, payslips, bank statements, proof of deposit), get an agreement in principle early, and instruct your solicitor the day your offer is accepted so conveyancing runs in parallel. During the process, respond to any lender queries the same day, and avoid changing jobs or taking on new credit, which triggers re-checks. Using a broker helps significantly — they submit complete applications to lenders with faster turnaround times, anticipate underwriter questions, and chase progress, which is why most UK mortgages now go through brokers.