London's 3 Most Expensive Areas: Which to Buy In?

London's most luxurious and expensive areas are Mayfair, Knightsbridge and Chelsea. According to Land Registry records, the median home sale in 2025 was about £2.9 million ($3.8 million) in Mayfair, £2.5 million ($3.4 million) in Knightsbridge and Belgravia, and £1.5 million ($2 million) in Chelsea.

All three are expensive, but they do not offer the same thing. Mayfair is mostly an apartment market, while Chelsea is a family house market. Below we compare the three areas using official sales data and explain the tenure you get and how much tax an overseas buyer pays.

The Three Areas Compared

Source: our own calculation from HM Land Registry 2025 sales records (market-value sales to individuals). Postcodes: Mayfair W1J and W1K, Knightsbridge and Belgravia SW1X, Chelsea SW3. Postcode boundaries do not match area boundaries exactly. The last row comes from market research (five years of data to April 2026).

What Is the Most Expensive Area in London?

The answer depends on the measure. Mayfair leads on median sale price. Knightsbridge and Belgravia edge ahead on price per sq ft among the most expensive homes. Chelsea has the most sales above £5 million, because far more houses change hands there.

One caution on the Mayfair figures: about two thirds of its 2025 Land Registry entries were transactions, such as company purchases, that this calculation leaves out. The true price level may be higher than the table shows.

Official borough averages are lower because they cover much wider areas. In August 2026 the average home cost £1,204,072 in Kensington and Chelsea, £887,206 in Westminster and £554,430 across London (UK HPI, provisional).

Mayfair: Apartment Living in the Centre

Mayfair lies between Hyde Park and Green Park in the City of Westminster. Georgian houses, squares such as Grosvenor Square and Berkeley Square, the shops of Bond Street and the restaurants of Mount Street define the area.

Around 90% of sales are flats. Only 6 house sales were recorded in 2025, at a median of £12.75 million. From Bond Street station the Elizabeth line runs directly to Heathrow. This makes Mayfair a natural fit for people who spend part of the year in London and want a home they can lock up and leave. The Mulliner at Gloucester House is one example in the area.

Knightsbridge: Between Harrods and Hyde Park

Knightsbridge sits south of Hyde Park and is split between Westminster and Kensington and Chelsea. Harrods and Harvey Nichols define it, and serviced apartment buildings are common. The Piccadilly line runs directly to Heathrow.

Its neighbour Belgravia, known for white stucco houses and embassies, shares the same postcode, so the table shows the two together. Independent schools nearby, such as Hill House, Knightsbridge School and More House, also make the area an option for families. For options, see our flats for sale in London page or message our consultant.

Chelsea: For Those Looking for a Family Home

Chelsea is on the north bank of the Thames in Kensington and Chelsea. The football club's stadium is actually in neighbouring Fulham. The area itself is known for the shops of King's Road, Sloane Square, the Saatchi Gallery and its red-brick streets.

It is the busiest market of the three: 97 of the 313 sales in 2025 were houses, at a median of £3.6 million. The median flat sold for about £1 million, so entry is lower than in the other two. For a smaller example, see The Lucan apartments.

Which Area Suits Whom?

• If you will spend a few months a year in London: Mayfair or Knightsbridge. Flats with a concierge and building services take less effort when you are away.
• If your family is moving: Chelsea. Houses with gardens, squares and nearby schools are easier to find here.
• If you want the most central address: Mayfair, with shops, restaurants and two large parks within walking distance.

What Are You Buying? Freehold and Leasehold

In these areas you often buy not the land but a long-term right to use the home. This is leasehold; full ownership including the land is freehold. The freehold share is 12% in Mayfair, 16% in Knightsbridge and Belgravia and 31% in Chelsea.

The reason is historical. A large part of Mayfair and Belgravia has belonged to the Grosvenor family since 1677, and a large part of Chelsea has been held by the Cadogan family since the 1700s. Before buying, ask your solicitor about the remaining lease term, ground rent, service charges and alteration consents. Leasehold rules are changing, but the 990-year extension right is not yet in force.

How Much Tax Does an Overseas Buyer Pay?

The main tax when buying a home in England is Stamp Duty. It is charged in bands, with a top band of 12%. Non-UK residents pay an extra 2% and buyers who own another home pay an extra 5%, which brings the top band to 19%.

Source: our own calculation using gov.uk rates. Company purchases and special cases excluded.

The 5% surcharge applies if you own a home worth £40,000 or more anywhere in the world, so a home in your own country counts. If you sell your previous main home within 3 years, you can reclaim it. If you spend 183 days in the UK in a qualifying 12-month period around the purchase, you can also apply for a refund of the 2% surcharge.

A new cost is also on the way. According to a government statement dated 28 October 2026, from April 2028 owners of homes worth £2 million or more will pay an extra £2,500 to £7,500 a year. The amount doubles for homes left empty and unfurnished for 12 months or more. The measure is not yet law. We suggest speaking to a tax adviser about your own circumstances before you buy.

Are Prices Falling?

Prices in these areas have been weak for more than a decade. According to market research, by mid-2026 prices were down 5% on the year in Mayfair, 5.5% in Knightsbridge and 4.3% in Chelsea. The total fall since 2014 is between 27% and 29% in all three. The decline has slowed in the last three months, and buyers are agreeing an average of 12.7% below the asking price, which gives them plenty of room to negotiate.