Thomas Cubitt (25 February 1788 – 20 December 1855) was a British master builder, notable for his employment in developing many of the historic streets and squares of London, especially in Belgravia, Pimlico[a] and Bloomsbury.

[4] He was commissioned in 1824 by Richard Grosvenor, 2nd Marquess of Westminster, to create a great swathe of building in Belgravia centred on Belgrave Square and Pimlico, in what was to become his greatest achievement in London.

[5] Notable amongst this development are the north and west sides of Eaton Square, which exemplify Cubitt's style of building and design.

[5] After Cubitt's workshops in Thames Bank were destroyed by fire, he remarked "Tell the men they shall be at work within a week, and I will subscribe £600 towards buying them new tools.

[9] His work outside London includes the country house Polesden Lacey, near Dorking, Surrey, which he rebuilt to largely its present form in the early 1820s.