Sir Frederick Miles Warren (10 May 1929 – 9 August 2022) was a New Zealand architect. He apprenticed under Cecil Wood before studying architecture at the University of Auckland, eventually working at the London County Council where he was exposed to British New Brutalism. Upon returning to Christchurch, and forming the practice Warren and Mahoney, he was instrumental in developing the "Christchurch School" of architecture, an intersection between the truth-to-materials and structural expression that characterised Brutalism, and the low-key, Scandinavian and Japanese commitment to "straightforwardness". He retired from Warren and Mahoney in 1994 but continued to consult as an architect and maintain his historic home and garden at Ohinetahi.