Sir Frederick Miles Warren ONZ KBE FNZIA (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.

He retired from Warren and Mahoney in 1994 but continued to consult as an architect and maintain his historic home and garden at Ohinetahi.

[2] Warren's first major building was the Dorset Street Flats (designed in 1956) that were derided as prison-like due to their small scale and exposed concrete.

[10] In March 2009, Warren was commemorated as one of the Twelve Local Heroes, and a bronze bust of him was unveiled outside the Christchurch Arts Centre.

[13] Critics of his work and its impact on the Victorian architectural heritage of Christchurch include Duncan Fallowell, who has written: "his buildings can't manage the simplest attributes of good design or benevolence".