| 1978 | Graeme Young & Associates founded in Edmonton |
| 1982 | Graeme Young & Associates opens Calgary office |
| 1989 | Avison & Associates founded in Toronto |
| 1990 | Avison Property Management Services founded |
| 1992 | Avison Real Estate Consulting founded |
| 1994 | Avison & Associates opens Vancouver office |
| 1996 | Avison & Associates merges operations with Graeme Young & Associates to form Avison Young |
| 1997 | Avison Young opens Mississauga office |
| 2002 | Avison Young opens Montreal office |
| 2003 | Avison Young opens Quebec City office |
| 2004 | Avison Young opens Winnipeg and Regina offices; forms strategic alliance with NewWest Enterprise Management Services in Western Canada |
| 2006 | Avison Young opens Halifax office |
| 2007 | Avison Young opens Ottawa office |
| 2008 | Avison Young offices merge to become Avison Young (Canada) Inc.; acquires Darton Property Advisors and Managers |
| 2009 | Avison Young opens offices in Chicago; Washington, DC; Lethbridge, AB; Toronto North |
| 2010 | Avison Young opens offices in Atlanta; Houston; Tysons Corner, VA; Boston; Guelph, ON; acquires Appian Realty Advisors, LLC and Hodges Management and Leasing Company |
| 2011 | Avison Young opens offices in Dallas, Los Angeles, Las Vegas; acquires Millennium Realty Advisors, LLC and Ramsey-Shilling Commercial Real Estate Services, Inc. |
