Why Is UK Property Conveyancing So Slow? Overseas Buyer Guide 2026

How Long Does UK Conveyancing Actually Take?

The national average is 154 days from agreed sale to legal completion, rising to 174 days in London, according to Rightmove’s 2026 data. That is 60% longer than the pre-financial-crisis baseline of 2007, and noticeably longer than comparable processes in most other markets.

For overseas buyers who have funds ready and documents prepared, this timeline can feel perplexing. Everything seems set on your side — so what is taking so long? UK residential conveyancing involves multiple stages, none of which any single party fully controls. IREIS Properties advises Hong Kong, Taiwanese, and overseas Chinese buyers through this process, and the delays we see consistently fall into six categories.

The Six Main Causes of Conveyancing Delay

Most delays trace back to one or more of the following bottlenecks. A single blocked stage pauses the entire process.

1. Local Authority Searches

Before your solicitor can approve the contract, they must commission three searches from the relevant local authority: a Local Land Charges search, an Environmental Search, and a Drainage and Water Search. During peak periods, councils can take up to 40 working days — roughly 8 to 10 weeks — to respond, and performance varies significantly between councils. If a search reveals a planning issue or environmental restriction on the title, further enquiries follow, adding more time before the contract can proceed.

2. Leasehold Information Pack

If you are buying a leasehold flat — the standard tenure for apartments in London — the seller’s solicitor must obtain a management information pack from the building’s managing agent. This document confirms service charge arrears, building insurance details, and any upcoming major works notices. Some managing agents are notoriously slow, with waits of 4 to 8 weeks, making the leasehold information pack a predictable bottleneck for the majority of central London apartment purchases.

3. Mortgage Lender Processing

Even with a mortgage Agreement in Principle already secured, your lender will undertake a fresh internal review after the formal property valuation is completed. Processing times at some lenders reach 4 to 6 weeks. For new build buyers, mortgage offers are typically valid for 6 months; if a developer delays practical completion repeatedly, you may need to reapply — restarting the clock and the underwriting process.

4. Anti-Money Laundering Due Diligence

UK solicitors are legally required to perform Anti-Money Laundering (AML) checks on all clients. For overseas buyers, scrutiny is heightened under the UK’s money laundering regulations. Funds wired from Hong Kong, Taiwan, or mainland China require 3 to 6 months of bank statements from the holding account, source-of-wealth documentation (salary slips, property sale proceeds, dividend records), and full SWIFT wire transfer records tracing the international movement of funds. Any gap in the documentation chain stops progress until it is resolved.

5. Contractual Enquiries

Your solicitor will raise written enquiries on the draft contract. The seller’s solicitor must compile responses, after which you review and confirm acceptance. New build contracts drafted by developer legal teams tend to be lengthy and complex — enquiry schedules of 40 to 60 items are not uncommon — and the back-and-forth process alone can consume 4 to 8 weeks of correspondence.

6. HM Land Registry First Registration

After legal completion, your solicitor must register the title transfer with HM Land Registry. For First Registrations — the category that applies to brand-new builds being registered for the first time — the Land Registry’s 2026 data shows an average processing time of 8 to 12 months, with 50% of cases completed within 9 months. You hold legal title from the moment of completion, but the paperwork works through the Land Registry queue on its own schedule.

The New Build Factor: PC Notice and Compressed Timescales

Buyers purchasing off-plan new builds face a mechanism with no equivalent in the secondhand market: the Practical Completion Notice (PC Notice).

A developer can only issue a PC Notice once the property has received its Building Regulations Completion Certificate and the relevant new homes warranty — most commonly NHBC Buildmark, which provides 10 years of protection across a 2-year builder warranty period and 8-year insurance coverage — has been registered. From the date of PC Notice, buyers typically have 7 to 14 days (around 10 working days) to complete the purchase. If your documents, funds, or mortgage approval are not already in place, you face financial penalties for late completion, and in serious cases may lose your reservation.

IREIS Properties recommends that new build buyers conduct a thorough document readiness check with their solicitor at least 3 months before the expected completion window. AML verification, source-of-funds documentation, and mortgage approval should all be fully in place long before the developer issues PC Notice.

New build buyers are also protected by a Longstop Date — the contractual deadline by which the developer must reach practical completion, typically 12 to 24 months after exchange of contracts. If that date passes without completion, buyers are entitled to withdraw and recover all payments made to date, including the exchange deposit. For a detailed overview of the off-plan new build purchase process, see our guide to buying new build property in the UK.

Additional Hurdles for Overseas Buyers

Beyond the delays that affect all buyers, those purchasing from Hong Kong, Taiwan, or mainland China routinely encounter several additional challenges:

Certified Identity Documents and Apostille: UK solicitors require notarised and Apostilled copies of passport and address verification documents. Obtaining notarisation and an Apostille through overseas channels can take 2 to 4 weeks. Start this process as soon as you reserve a property — do not wait for your solicitor’s formal request, as the delay compounds with every other stage running concurrently.

Power of Attorney: If you cannot travel to the UK to sign contracts in person, you will need a Power of Attorney, itself requiring notarisation and Apostille certification. Some mortgage lenders have specific format requirements for Powers of Attorney; confirm compatibility with your solicitor before finalising the document, to avoid having to redo the process and losing several additional weeks.

Cross-border fund transfers: Your solicitor requires complete SWIFT wire transfer records and statements from the sending bank account. Use a regulated bank for all international transfers to maintain an unbroken, traceable documentation chain. After legal completion, Stamp Duty Land Tax (SDLT) must be reported and paid within 14 days — use our stamp duty calculator to model your liability well in advance so there are no financial surprises at completion.

Five Strategies to Shorten the Wait

Understanding the causes of delay puts you in a position to act before they become a problem for your purchase:

1. Instruct a solicitor before the contract arrives. As soon as you reserve a property, engage a solicitor and complete the ID verification and AML client onboarding process. When the draft contract lands, your solicitor can begin work immediately rather than spending 1 to 2 weeks on administrative setup.

2. Choose a firm experienced with overseas buyers. A solicitor’s practice with a track record of Hong Kong and Taiwanese clients will know how to handle certified overseas identification, SWIFT documentation, international bank statements, and gift letter structures — reducing the time spent on supplementary requests and re-submissions.

3. Prepare your source-of-funds pack before you need it. Six months of bank statements, salary records, asset-sale documentation, and a gift letter (if applicable) should be assembled before you agree a purchase price. Do not wait for your solicitor to ask — that adds at least 2 to 4 weeks of avoidable delay.

4. Monitor your mortgage validity window. UK mortgage offers run for approximately 6 months. For new build purchases, confirm that the expected completion date falls within that window. If slippage is likely, discuss a renewal strategy with your mortgage adviser before the offer expires — restarting the mortgage process from scratch after expiry costs weeks, not days.

5. Track search progress actively. Ask your solicitor for regular status updates on local authority searches. For areas with known turnaround delays, explore whether Search Insurance would allow your solicitor to proceed with contract review while the physical search results are still pending — this removes one of the most significant single-stage bottlenecks from the critical path.

For a comprehensive overview of the UK property purchase process from start to finish, see our complete UK buying guide or browse the Buying Guides knowledge centre for additional resources. To discuss your UK purchase plans with an IREIS Properties adviser, contact us today.