Why Does Apsley House Have The Address Number 1 London?

Last Updated 27 August 2026

Laura Reynolds Why Does Apsley House Have The Address Number 1 London?
A large, three-story neoclassical stone building with a central portico featuring four Corinthian columns and a triangular pediment, flying a Union Jack flag from the roof. The building is situated behind a green iron fence with stone pillars on a city street.
Image: Matt From London, Creative Commons

Have you ever strolled south-west along Piccadilly to Hyde Park Corner and noticed this rather regal building facing out onto Wellington Arch? It's called Apsley House, was home to the 1st Duke of Wellington for years, but also lays claim to having the address 'Number 1, London'.

The original house was built on the site in 1778, for Lord Apsley. Being in Hyde Park, the lease for the land was negotiated from the Crown Estate, and the house was the first one on the north side of Piccadilly. At the time, it was next to the main turnpike or toll into central London at Knightsbridge, so became known as 'Number 1, London', because it was  the first house you came to once you entered London.

The modern house differs significantly from the original red-brick house built in the 1770s. In 1819, Wellington added a three-storey extension to the north-east, encompassing a State Dining Room, new bedrooms and dressing rooms. 10 years later when the Duke of Wellington became Prime Minister, he further added a new staircase and the Waterloo Gallery on the west front.

The property's official address today is 149 Piccadilly, Hyde Park Corner, London, W1J 7NT, but rumours still abound that if you posted a letter to 'Number 1, London' it would reach this address. We haven't tried this one, but if you do, let us know how you get on.

Today, Apsley House is a Grade I listed building, owned and managed by English Heritage and open to the public. Check website for prices and opening times.