John Bevir was born in Bideford, Devon in 1877. He studied at the Architectural Association Schools in London and was articled to Arthur George Spencer of Young & Spencer in Lymington, Hampshire. He subsequently worked as an assistant in the Engineer's Office of Midland Railway (Northern Counties). In 1903 he commenced independent practice in Lymington. During the late 1930s he was in partnership with Gascon Bagnall in the architectural practice Bevir & Bagnall in Lymington.
Bevir was a Member of the Society of Architects (MSA) and in 1936 was elected a Licentiate of the Royal Institute of British Architects (LRIBA) in 1936. His address was given as 35 and 36, St. Thomas Street, Lymington, and 18, Coleman Street, London in 1914; and 74 High Street, Lymington, Hampshire in 1939. He died on 4 August 1945. His death was registered in the New Forest District, Hampshire
Restoration of Lymington Parish Church; alterations to Church of England Schools, Lymington; additions to Ossemsley Manor, Hants; alterations Haddon Hill. Christchurch; several stations for Midland Railway Co.; alteration to Northern Counties Hotel, Portrush
Directory of British Architects 1834-1914. Compiled by Antonia Brodie, et al. Volume 1: A-K. London; New York: British Architectural Library, Royal Institute of British Architects/Continuum, 2001