The RIAI Triennial Gold Medal has been awarded since 1934 to the best building completed in the preceding three years by a member of the Royal Institute of the Architects of Ireland.
| Years | Building | Architect |
|---|---|---|
| 1932–1934 | St Thomas' Church, Dublin | Frederick Hicks |
| 1938–1940 | Dublin Airport | Desmond Fitzgerald |
| 1947–1949 | Aspro Factory, Dublin | Alan Hope |
| 1950–1952 | Out-Patient's Department and Treatment Centre at St. Luke's Hospital, Rathgar | Thomas Kennedy |
| 1953–1955 | Busáras, Dublin | Michael Scott |
| 1956–1958 | College of Physical Education, Dominican Convent | Piaras Mac Cionnaith |
| 1959–1961 | Raidió Teilifís Éireann Studios | Michael Scott & Partners |
| 1962–1964 | GEC Factory | Michael Scott & Partners |
| 1965–1967 | Church of St Aengus, Burt | Liam McCormick |
| 1968–1970 | Restaurant Building, UCD | Robin Walker |
| 1971–1973 | Administration Building, UCD | Andrzej Wejchert |
| 1974–1976 | Irish Management Institute, Dublin | Arthur Gibney & Partners |
| 1977–1979 | Currency Centre, Dublin | Sam Stephenson |
| 1980–1982 | St. Brendan's Community School, Birr | Peter & Mary Doyle |
| 1983–1985 | Calvert House Offices, Belfast | Kennedy Fitzgerald Architects |
| 1986–1988 | Bolton Street, Dublin | Gilroy McMahon Architects |
| 1989–1991 | Tourist Office, Limerick | Murray Ó Laoire Architects |
| 1992–1994 | Ceide Fields Visitor Centre, Co Mayo | Mary McKenna |
| 1995–1997 | Library, Cork Institute of Technology | De Blacam & Meagher |
| 1998–2000 | Ranelagh Multidenominational School, Dublin | O'Donnell & Tuomey |
| 2001–2003 | Croke Park Development, Dublin | Gilroy McMahon Architects |
| 2004–2006 | Poustinia, Co. Tipperary | Tom Maher & Kevin Bates |
| 2007–2009 | Bocconi University, Milan | Grafton Architects |
| 2010–2012 | Lyric Theatre, Belfast | O'Donnell & Tuomey |