The following list is of the completed works by the Toronto architectural firm John B. Parkin Associates.
| Name | City | Address | Year | Status |
| Central Christadelphian Church | Toronto | 728 Church Street | 1950 | |
| York Township Hydroelectric System | Toronto | 15 Rotherham Avenue | 1950 | |
| Fabergé Perfumes Building | Toronto | 30 Queen Elizabeth Boulevard | 1950 | |
| Humber Memorial Hospital | Toronto | 200 Church Street | 1950 | |
| Howard Wrigglesworth Public School | Georgetown | 96 Guelph Street | 1951 | Now Gary Allan H.S. |
| New Toronto Secondary School (Lakeshore Collegiate Institute) | Etobicoke | 350 Kipling Avenue | 1951 | |
| George Harvey Collegiate Institute | York | 1700 Keele Street | 1953 | |
| John C. Parkin House | North York | 75 The Bridle Path | 1954 | Demolished |
| Ontario Association of Architects Building | Toronto | 50 Park Road | 1954 | |
| Janssen-Ortho Pharmaceuticals | North York | 19 Greenbelt Drive | 1955 | |
| Simpson-Sears Industrial Development | Toronto | 2200 Islington Avenue | 1955 | |
| John B. Parkin Associates Office | North York | 1500 Don Mills Road | 1955 | Demolished |
| Salvation Army National Headquarters | Toronto | 20 Albert Street | 1956 | Demolished |
| Parking Garage | Toronto | 29 Temperance Street | 1957 | Demolished |
| Parking Garage | Toronto | Dundas Square | 1957 | Demolished |
| Don Mills Federal Building | North York | 169 The Donway West | 1958 | |
| Don Mills Collegiate Institute | North York | 15 The Donway East | 1959 | |
| Don Mills Junior High | North York | 17 The Donway East | 1959 | |
| Sidney Smith Hall | Toronto | 100 St. George Street | 1961 | |
| Sun Life Building | Toronto | 200 University Avenue | 1961 | |
| Imperial Oil Ontario Regional Headquarters | North York | 825 Don Mills Road | 1962 | Demolished |
| Nathan Phillips Square Parking Garage | Toronto | 110 Queen Street West | 1963 | |
| Centre for Addiction and Mental Health | Toronto | 250 College Street | 1964 | |
| Yorkdale Shopping Centre | North York | 3401 Dufferin Street | 1964 | |
| Aeroquay No. 1 | Toronto | Toronto Airport | 1964 | Demolished |
| Control Tower | Toronto | Toronto Airport | 1964 | Demolished |
| Barber-Ellis | Toronto | 20 Overlea Boulevard | 1964 | |
| Bata International Centre | North York | 59 Wynford Drive | 1965 | Demolished |
| J. Douglas Crashley House | Toronto | 3 Old George Place | 1965 | Significantly altered |
| IBM Canada Headquarters | North York | 1150 Eglinton Avenue East | 1967 | |
| Automotive Service Centre | Toronto | Toronto Airport | 1967 | Demolished |
| Ottawa Station | Ottawa | 200 Tremblay Road | 1967 | |
| Simpson Tower | Toronto | 401 Bay Street | 1969 | |
| Joseph Gibbons Public School | Georgetown | 41 Moore Park Crescent | 1970 |