But, despite its slim exterior, the Thurloe Square home will set you back £795,000.
If you're wondering what you can fit within the four metre width - the flat manages to squeeze in two bedrooms and two bathrooms.
The former art studio was built on land that was left over after houses were demolished to make way for the London Underground at the end of the nineteenth century.
The government of the time stopped the Metropolitan Railway Company from building an entrance to South Kensington tube station in Thurloe Square, leaving space for the so-called "Thin House".
Purple Bricks, the estate agent selling the flat, told ITV News London: "This is a unique opportunity to live in a well-known local tourist attraction, the 'Thin House'."
Last year, Winkworth estate agent listed a six foot-wide house in Shepherd's Bush, for £950,000. The company described the West London property as "probably the thinnest house in England".