Buying Property in London as an American: The Complete 2026 Guide

Americans now account for roughly 25% of prime London property purchases. Yet the UK buying process differs from the US in almost every respect — from the moment an offer is accepted to the moment keys are handed over. This guide walks through every stage, explains the leasehold-specific steps that catch most American buyers off guard, and tells you exactly what to do at each point.

The Five Biggest Differences from US Real Estate

Before covering the process step by step, these five structural differences shape everything:

1. No binding contract until exchange. In the US, an accepted offer creates a binding agreement almost immediately. In the UK, neither party is legally committed until "exchange of contracts" — typically 8–12 weeks after an offer is accepted. Until then, either party can walk away penalty-free. The seller can accept a higher offer (called gazumping). You can have your survey done, spend £3,000 on legal fees, and lose the property at any point before exchange.
2. No title insurance. UK conveyancing uses a land registration system administered by HM Land Registry. Your solicitor conducts searches (local authority, water and drainage, environmental) instead of relying on title insurance. Title insurance exists in the UK but is uncommon.
3. No escrow service. In the US, an independent escrow company holds funds and coordinates the closing. In the UK, your solicitor holds all funds and coordinates the money transfer directly with the seller's solicitor.
4. No 30-year fixed mortgage. UK mortgages are typically 2–5 year fixed deals that then revert to a variable rate. As a non-resident American, you will need a specialist expat mortgage — requiring a 25–40% deposit and rates typically 0.5–1.5% higher than standard UK rates.
5. Leasehold for virtually all flats. Almost every flat in London is leasehold. Before the US equivalent of "closing," you need to understand the lease, the remaining term, the ground rent, and the service charge history — additional due diligence that does not exist in US condo purchases.

Step-by-Step: The UK Property Buying Process

Stage 1: Prepare Your Finances (2–4 weeks before searching)

Obtain a mortgage agreement in principle from a specialist expat lender before viewing properties. UK estate agents take offers more seriously when buyers have financing confirmed. As a non-resident, expect to need:

• 25–40% deposit (some lenders require more)
• UK bank account or the ability to transfer funds from a US account
• Proof of income acceptable to the lender (US W-2s, tax returns, or employer letter)
• Identification satisfying UK anti-money laundering requirements (passport, proof of US address, source of funds documentation)

Stage 2: Instruct a Solicitor Early

In the UK, you instruct your solicitor before you have found a property — not at the moment of exchange. Having a solicitor ready to begin work the day your offer is accepted reduces the risk of losing the property to another buyer during a slow conveyancing process. For a leasehold flat, you specifically need a solicitor experienced in leasehold review, ideally with experience of non-resident purchases.

Stage 3: Make an Offer

Offers in the UK are made verbally or in writing to the estate agent — not to the seller directly and not in a signed contract. Offers are legally non-binding. Standard practice is to offer below asking price and negotiate. In competitive London markets, sealed bids (offers submitted simultaneously by multiple buyers) are common.

When your offer is accepted, the estate agent will mark the property "sold subject to contract" (SSTC). This means nothing legally — the seller can still accept higher offers until exchange.

Stage 4: Survey and Valuation (2–4 weeks)

Commission an independent survey — not just the lender's valuation. For a leasehold flat, a RICS HomeBuyer Survey (Level 2) is standard. This checks the condition of the building and identifies any urgent defects. For older buildings or those with potential cladding or building safety issues, a Level 3 Building Survey is advisable. A good surveyor will also flag concerns about the lease, service charge history, and any Section 20 major works consultations in progress.

Stage 5: Leasehold Due Diligence — The Most Important Stage for Flat Buyers

This stage has no equivalent in US real estate. Your solicitor must:

• Review the full lease document — checking remaining term, ground rent clauses, service charge obligations, restrictions, and forfeiture provisions
• Obtain a Management Information Pack from the freeholder — containing service charge accounts for the last 3 years, reserve fund balance, insurance certificate, and details of any planned major works
• Check whether the ground rent contains an escalation clause and its implications for mortgageability
• Obtain a lease extension premium estimate if the lease has fewer than 90 years remaining — use our free calculator for an immediate estimate
• Confirm who the freeholder is and whether the building has share of freehold
• Check for any building safety issues — for buildings above 11 metres, an EWS1 (External Wall System) form may be required confirming cladding safety

Stage 6: Exchange of Contracts

Exchange is the moment the purchase becomes legally binding. At exchange:

• You pay a deposit — typically 10% of the purchase price
• A completion date is set — usually 2–4 weeks after exchange
• You and the seller are now legally committed. If you pull out after exchange, you lose your deposit. If the seller pulls out, they must compensate you.

For American buyers: exchange typically requires you to transfer funds from your US account to your UK solicitor's client account. Allow 5–10 business days for international wire transfers and currency conversion. Use a specialist currency exchange service (OFX, Wise, or similar) rather than your bank — the saving on exchange rates can be substantial on a £500,000+ purchase.

Stage 7: Completion

On the completion date, the remaining purchase funds are transferred, the seller vacates, and legal ownership transfers to you. Your solicitor registers the purchase at HM Land Registry. You receive the keys.

The same day, you must pay Stamp Duty Land Tax (SDLT) — see our guide on London Property Taxes for Americans for the full breakdown including non-resident and second home surcharges.

The Complete Timeline

What to Do About Leasehold Before You Even Start Searching

The single best thing an American buyer can do before viewing any London flat is to understand the leasehold numbers for properties they are considering. Our free lease extension calculator lets you enter a property value, lease length, and ground rent and immediately see what a lease extension would cost. Run this calculation on every flat you are seriously considering — it may change your offer price significantly.

The American's Guide to Buying a UK Leasehold Flat covers every stage of this process in detail — including US tax reporting obligations, stamp duty worked examples, and a complete pre-purchase checklist.

Frequently Asked Questions