Developer and builder. British History Online says that in 1823 he bought "over thirteen acres which was advertised for sale as building ground". That site has a map showing the area, which included Aubrey House and what is now Campden Hill Square. Hanson lived in the house briefly but in 1827 sold it and its gardens. Meanwhile he laid out Notting Hill Square, which was renamed Campden Hill Square in 1893, together with the architect and surveyor, George Edward Valintine. Nos 2 and 52, the grandest in the square were built first and were probably intended for Hanson and Valintine themselves. Hanson lived at no 2 1828-30 but Valintine never occupied no 52. By 1839 Hanson had sold all of his interest in the square.
Hanson was also involved in property development in Brighton and at the Ladbroke estate, in Peel Street and at Hyde Park Gate. Died in or before 1847.
