[1] He designed many buildings in London, including the Church of St Peter's and parts of the elegant Ladbroke Estate in Notting Hill.

He also worked with Sir Charles Barry on numerous projects, including the Houses of Parliament and the remodelling of Highclere Castle.

In 1832 he published Westmorland, Cumberland, Durham and Northumberland Illustrated from Original Drawings by Thomas Allom (three volumes).

In 1834 Allom arrived in Istanbul, Turkey, and produced hundreds of drawings during journeys through Anatolia, Syria and Palestine.

[7] In 1868 he designed Holy Trinity Barnes (in south west London), his local church to which he contributed £50 towards the cost of its construction.