Most Expensive Streets in the UK 2026: Where Millionaires Live

Methodology

Rankings are based on average sold prices from HM Land Registry data for transactions recorded in the most recent available period, filtered by streets with multiple high-value sales. Some ultra-prime sales are confidential and may not appear in the registry. Data accessed via HouseCheckup's property intelligence platform covering 29M+ properties, built on official data sources.

The 20 most expensive streets in the UK 2026

1. Kensington Palace Gardens — £36M+ average

Also known as "Billionaires' Row," Kensington Palace Gardens is a private road flanked by embassies and mega-mansions between Kensington High Street and Notting Hill Gate. The road is gated at both ends with 24-hour security. Properties here have sold for over £100 million, with buyers including international royalty, oligarchs, and tech billionaires. The road runs alongside Kensington Palace, with mature plane trees creating a leafy tunnel effect. Despite the astronomical prices, HouseCheckup data reveals that even these properties sit in areas with flood risk considerations (the Westbourne stream runs beneath the area) and conservation area planning restrictions.

2. Grosvenor Crescent — £28M+ average

This sweeping Belgravia crescent overlooks private gardens and sits between Hyde Park Corner and Belgrave Square. The Grosvenor Estate (owned by the Duke of Westminster) maintains the area to immaculate standards. Properties are typically grand stucco-fronted houses converted to luxury flats or maintained as single-family homes. The crescent's SW1 address, park views, and estate management command extraordinary premiums.

3. The Boltons — £25M+ average

An oval-shaped crescent in South Kensington surrounding a private garden, The Boltons is one of London's most recognisable addresses. Victorian mansions here are among the largest single-family homes in central London, often exceeding 10,000 sq ft. Past residents have included Douglas Fairbanks Jr and Beatrix Potter. HouseCheckup data shows the area has low flood risk, excellent transport links, and sits within a conservation area with strict planning controls.

4. Eaton Square — £22M+ average

Belgravia's grandest garden square stretches across three sections, making it one of the largest squares in London. The white stucco terraces are Grade II listed, and the central gardens are private to residents. Properties here are typically large lateral flats (2,000-5,000 sq ft) or occasionally full houses. Former residents include Stanley Baldwin, Neville Chamberlain, and Sean Connery.

5. Ilchester Place — £20M+ average

Running alongside Holland Park, Ilchester Place benefits from one of London's most beautiful green spaces. The large detached and semi-detached houses here enjoy exceptional privacy for central London, with generous gardens backing onto the park. The Japan Kyoto Garden, the orangery, and woodland walks are effectively on your doorstep.

6–10: Ultra-prime London

Chester Square (£18M+) was home to Margaret Thatcher and remains one of Belgravia's most prestigious addresses. The Bishops Avenue (£16M+) in Hampstead is London's most famous "millionaires' row," though several properties have infamously stood empty for years. Courtenay Avenue (£14M+) in Highgate offers hilltop mansions with panoramic views. Compton Avenue (£13M+) neighbours Courtenay with similar gated exclusivity. Avenue Road (£12.5M+) runs from Regent's Park through St John's Wood, with properties ranging from grand villas to modern mansions.

11–15: Prime London £10M+ streets

Phillimore Gardens and Campden Hill Road represent Kensington's finest, with conservation area protections and private garden squares. Tregunter Road in Chelsea features mansion blocks converted to ultra-luxury apartments. Hamilton Terrace in St John's Wood offers Victorian villas on one of London's finest tree-lined streets. Montpelier Square in Knightsbridge combines a garden square with proximity to Harrods and Hyde Park.

16–20: Beyond London

The most expensive streets outside London demonstrate that ultra-prime wealth extends beyond the M25. Wentworth Estate (£8.5M+) in Virginia Water is a private estate surrounding the famous golf course, popular with celebrities and business leaders. Coombe Hill Road (£7M+) in Kingston offers estate homes with London proximity. Titlarks Hill (£6.5M+) near Ascot provides Crown Estate woodland privacy. Sandbanks (£5.5M+) in Poole is one of the world's most expensive coastal strips per square metre. Alderley Edge (£4.5M+) in Cheshire is the North's most expensive enclave, famous for its Premier League footballer residents.

What makes a street ultra-valuable?

Several factors consistently drive ultra-prime pricing:

• Security and privacy — gated roads, private gardens, set-back properties
• Green space — park frontage or private gardens
• Conservation status — protecting character and preventing inappropriate development
• Prestige and history — famous former residents, architectural significance
• Plot size — large gardens are exceptionally rare in central London
• Transport — even billionaires value proximity to central London

Do expensive streets have property risks?

Yes. Price does not eliminate risk. Several of London's most expensive streets sit on clay soils prone to subsidence, near historic watercourses that create flood risk, or in conservation areas that restrict modifications. The Bishops Avenue famously has several abandoned mansions. Even at £36 million, a property on Kensington Palace Gardens sits above the culverted Westbourne stream. HouseCheckup analyses every property equally, whether it costs £60,000 or £60 million — flood risk, ground stability, and environmental factors do not respect price tags.

Can I check these properties on HouseCheckup?

Yes. HouseCheckup covers 29M+ properties across England and Wales, including ultra-prime addresses. Search any address for a Snapshot or order the Complete report (£24.99) for the full 18-page analysis. You might be surprised what the data reveals about even the most expensive streets in the country.