Milner Square and Gibson Square (to the south) were part of the estate laid out from 1823 for Thomas Milner Gibson, who leased the land from the Lord of Barnsbury Manor, William Tufnell. Gibson was heir to a fortune made from plantations in Trinidad, and later became President of the Board of Trade. The original plan for
Milner Square by architect Francis Edwards was never carried out, but was replaced in 1839 with a neo-classical design by architects Roumieu and Gough. Some elements of the buildings were lost in the 1930s, with the removal of projecting porches and decorative ironwork, which blocked light into the basements of the houses, many of which had become flats. The square became run down and was restored as council housing by Islington Council in 1973.