He joined his father's practice and ultimately succeeded his father as surveyor of the Grosvenor Estate, and held the position during the main phase of the development of Belgravia and Pimlico by the contractor Thomas Cubitt.
He held this position for 41 years, covering the entire period of Thomas Cubitt's speculative developments.
[2] St Barnabas was built to suit the high church tendency, with a richly decorated interior and a screen separating nave from chancel.
[3] It forms part of a unified scheme,[4] with schools and a parsonage in the same Early English style: Charles Locke Eastlake commented that the parsonage "was probably the first instance in which a Victorian drawing-room received its light from a lancet window.
"[3] Cundy lived at Bromley in Kent in his later years, and died on 15 July 1867, aged 77.