In his architecture, Andrews shows more concern with solving specific site and programmatic requirements than with establishing a distinctive style. He develops the building and site according to climatic conditions and user needs. With a rational approach that emphasizes circulation and user interaction, Andrews creates user friendly environments. 
- Scarborough College (1963 - 1969)
- Library at the University of Western Ontario in London.
- Academic buildings, Ontario.
- Gund Hall at Harvard University, Cambridge, Massachusetts, 1968 to 1972.
- Miami Seaport Passenger Terminal, Miami, Florida (1970)
- Kent State University School of Art in Ohio (1972)
- CN tower (1973)
- Hooker Tower in Sydney (1974)
- Intelsat Headquarters, Washington, D.C. (1988).