Born in 1954, Ahsan earned his B. Arch. from the Bangladesh Engineering University, Dhaka, 1979. He was partner and later principal of the architectural firm C.A.P.E. (Consulting Architects Planners and Engineers), 1980-1997 and member of the Executive Committee of Institute of Architects Bangladesh, 1993-95, and 1997. He was a key founder member of CHETANA Architecture Research Society (1983). Selected architectural works include: Shaheed President Ziaur Rahman's Mausoleum at Sherebanglanagar, Dhaka; Manarat International School, Dhaka; S.O.S. Youth Village at Mirpur, Dhaka; Hermann Gmeiner School at Mirpur, Dhaka; S.O.S. Children's Village and College at Bogra. In 1996 the Drik Gallery in Dhaka hosted "Borderline," a solo exhibition of Raziul Ahsan's artworks, and in 1997 he was co-author of Pundranagar to Sherebanglanagr: Architecture in Bangladesh, 1997.
Raziul Ahsan died in a car accident in December 1997.