The step-by-step process of buying a house in London follows the same legal path as the rest of England, but the capital adds its own pressures: high prices, a heavy share of leasehold flats, and local search delays that can stretch the timeline. Most purchases run from offer to completion in around 10 to 16 weeks, though leasehold and long chains regularly push that to four to six months.
This guide walks through each stage in order, sets out realistic timings, explains the leasehold question that dominates London, and flags the costs and recent legal changes to watch. It is general information, not legal or financial advice, so use a solicitor and a mortgage professional for your own transaction.
The process, stage by stage
From an accepted offer to the keys in your hand, a typical London purchase moves through a clear sequence. Understanding it helps you spot where things slow down.
- Sort your finances and get an agreement in principle from a lender, so you know your budget and can make a credible offer.
- Find a property, view it, and make an offer through the estate agent. In London this is often competitive, so be ready to move quickly.
- Instruct a solicitor or conveyancer once your offer is accepted, and complete anti-money-laundering and source-of-funds checks.
- Arrange a survey appropriate to the property’s age and type, so you understand its condition before you are committed.
- Your solicitor orders local authority and other searches, which in some London boroughs can take several weeks to return.
- Your lender carries out its valuation and, once satisfied, issues a formal mortgage offer.
- Your solicitor raises and resolves enquiries with the seller’s solicitor, including the leasehold management pack where relevant.
- You exchange contracts, at which point the purchase becomes legally binding and you pay your deposit.
- You complete on the agreed date, the money is transferred, and you collect the keys.
- After completion, your solicitor files the Stamp Duty Land Tax return within 14 days and registers you as the owner at HM Land Registry.
The order rarely changes, but the time each step takes varies enormously depending on the chain, the lender and the property type.
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How long it takes
There is no single answer, because the timeline depends on what you are buying and who else is involved. The figures below reflect typical 2026 ranges from offer accepted to completion.
| Scenario | Typical timeline |
|---|---|
| Cash purchase, freehold, no chain | 4–6 weeks |
| Freehold with mortgage, short or no chain | 8–12 weeks |
| Average transaction (all types) | 10–16 weeks |
| Leasehold or long chain | 14–20 weeks or more |
Chains are the single biggest cause of delay: if any linked sale stalls, every transaction in the chain waits. Local authority search backlogs, mortgage processing times and the wait for a leasehold management pack are the other common culprits.
Leasehold versus freehold in London
This matters more in London than almost anywhere else, because so much of the housing stock is flats, and most flats are leasehold. The distinction affects your costs, your control and how long the purchase takes.
| Feature | Freehold | Leasehold |
|---|---|---|
| What you own | The property and the land | The right to occupy for a fixed term |
| Ongoing charges | Generally none beyond your own upkeep | Service charge and often ground rent |
| Typical property | Houses | Flats |
| Conveyancing time | Shorter | Longer, due to the management pack and lease review |
If you buy leasehold, your solicitor should check the remaining lease length, the service charges, any ground rent, and whether major works are planned. A short lease can be expensive to extend and can affect both mortgage availability and resale.
As a rough rule, leases below about 80 years become more costly to extend, because of the way the extension premium is calculated, so this is one of the first things to establish. Service charges in London flats can also run to several thousand pounds a year, particularly in newer developments with lifts, concierge or communal grounds, and they are not always obvious from the listing. Asking for the actual figures early, rather than after your offer is accepted, can save an unwelcome surprise later in the process.
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The costs to budget for
The purchase price is only the start. Buyers in London should plan for several additional costs, paid at different points in the process.
- Stamp Duty Land Tax, payable within 14 days of completion. Standard rates start above £125,000, with first-time buyer relief up to £300,000 and a 5% surcharge on additional properties.
- Legal and conveyancing fees, plus the cost of searches.
- A survey, the level of which should match the property’s age and condition.
- Mortgage arrangement and valuation fees, where applicable.
- Removal costs and, for leasehold flats, the first service charge and any apportionments.
For context, the average London property was worth around £542,000 in early 2026 according to the UK House Price Index, so stamp duty alone can be a significant sum.
Legislation and reforms to know
Several legal changes are reshaping the process, and the dates matter. The Leasehold and Freehold Reform Act 2024 became law in May 2024, though much of it is not yet in force. From February 2025, leaseholders no longer have to wait two years after buying before extending a lease or buying the freehold. In January 2026 the government published a draft Commonhold and Leasehold Reform Bill, proposing to ban most new leasehold flats, make commonhold the default for new flats, and cap existing ground rents.
On the buying process itself, the government published a home buying and selling reform roadmap on 19 June 2026, proposing upfront “sales packs” at the point of listing, digital property logbooks, electronic identity checks and AI-assisted conveyancing. It estimates the package could cut average buying times by around four weeks. You can read the detail in the government’s home buying reform roadmap and the broader leasehold changes in the government’s leasehold toolkit.
Buyers of flats should also be aware that Building Safety Act requirements can add checks to leasehold purchases, particularly in higher-risk buildings.
Tips to keep things moving
While chains and search times sit outside your control, plenty does not. A few habits make a real difference to how quickly you complete.
- Get your finances and an agreement in principle in place before you start viewing.
- Instruct your solicitor early and have your identification and documents ready from day one.
- Respond promptly to every enquiry, as delays compound through a chain.
- Ask the agent about the chain before you offer, so you go in with realistic expectations.
- For leasehold, ask for the lease length and service charge figures upfront.
A proactive, experienced conveyancer is one of the best investments you can make in a smooth transaction.
A note on the London market
Buying in London differs from the rest of the country in degree as much as in process. Prices are far higher than the national average, the share of leasehold flats is much greater, and competition for desirable homes can be intense, which puts a premium on having your finances arranged before you offer.
At the same time, the London market has been comparatively flat recently, with the UK House Price Index recording a modest annual fall in the capital into 2026 even as other regions rose. For buyers, a slower market can mean a little more room to negotiate and less pressure to commit before you are ready — though conditions vary street by street, so local knowledge matters.
The bottom line
The step-by-step process of buying a house in London is logical once you can see it laid out, but the timeline is rarely fully in your hands — chains, searches and leasehold complications all play a part. Knowing the sequence, budgeting for the full set of costs, and acting quickly at each stage will give you the best chance of a smooth completion. For your own purchase, lean on a solicitor and a mortgage professional, as this guide is a starting point rather than tailored advice.
Frequently asked questions
How long does it take to buy a house in London?
Most purchases take around 10 to 16 weeks from offer to completion, with cash, freehold, no-chain deals quicker. Leasehold flats and long chains often take four to six months.
What is the difference between leasehold and freehold?
Freehold means you own the property and the land outright, while leasehold means you own the right to occupy for a fixed term, usually with a service charge and sometimes ground rent. Most London flats are leasehold.
When do I pay stamp duty when buying a house in London?
Your solicitor files the Stamp Duty Land Tax return and pays it within 14 days of completion. It is due at completion and cannot be added to your mortgage.
What causes the most delays?
Property chains are the biggest single cause, followed by slow local authority searches and leasehold management packs. Getting your finances and documents ready early helps avoid adding to them.
