1922
The Seattle Chapter of the Associated General Contractors of America is formed for all contractors (later changed to Seattle Northwest Chapter).

1925
Northwest Construction Council is formed for specialty-contractor and associate members.

1927
Heavy/highway contractors break away and form a separate organization not affiliated with AGC of America.

1930
The Mountain Pacific Chapter of the Associated General Contractors of America is formed for heavy/highway contractors.

1945
The Tacoma Chapter of the Associated General Contractors of America is formed for all contractors in Pierce & Thurston County areas.

1970
The Seattle Northwest and Mountain Pacific chapters purchase land on Lake Union and agree to build.

1973
The Seattle Northwest and Mountain Pacific chapters merge, forming the Seattle Chapter.

1980
The AGC Education Foundation is established.

1981
The Seattle Chapter opens a legislative office in Olympia.

1983
The Northwest Construction Council is dissolved. Seattle Chapter opens to affiliate memberships.

1986
The Seattle and Tacoma chapters consolidate into AGC of Washington. Tacoma facility remains open as a district office.

1990
AGC of Washington establishes the AGC Safety Team® to promote safe work environments that meet and exceed industry standards.

1990
AGC of Washington opens a district office in Bellingham.

1991
AGC Group Retro is established.

1993
AGC of Washington opens a district office in Yakima.

1997
AGC of Washington celebrates its 75th anniversary.

1998
Through Task Force 21, AGC of Washington develops new mission and vision statements.

1999
AGC of Washington adopts a five-year strategic plan.

2004
AGC of Washington adopts a new five-year strategic plan.

2009
AGC of Washington adopts a new five-year strategic plan.

2010
AGC redefines its mission and vision statements; the AGC Education Foundation celebrates its thirty-year anniversary; the AGC of Washington Safety Team celebrates twenty years of safety excellence and the Southern District office relocates from Tacoma to Fife.

2016     
Nancy Munro, of MidMountain Contractors, takes the reins as the first female president of AGC of Washington. Previously, Munro served two years on the AGC of Washington board and two years on the AGC Education Foundation board. 

2016     
AGCW’s Board of Trustees officially adds one Future Leaders Forum (FLF) representative to the Board. AGCW develops a new improved website and online database. The BuildWashington.com website is created to promote construction-industry career awareness, to help connect craft workers and employers, and promote industry training opportunities and programs throughout Washington State. Emphasis during the year is heavily focused on workforce development and diversity.

2017    
AGC of Washington develops its first workforce-development bill, which is approved and signed by the Governor on May 5.  

2017    
The Future Leadership Forum (FLF) rebranded and changed its name to Construction Leadership Council(CLC).

2018    
AGC introduced a special one-year Introductory Membership dues rate to certified DBE/WMBE companies joining AGC of Washington. AGC of America celebrates its 100-year anniversary.

AGC launches the Culture of CARE initiative to promote workplace diversity and inclusion as well as to deliver resources to help companies become more diverse at every level of their operations. 100 member companies and public agencies sign on to pledge their support of the Culture of CARE program.

AGC of Washington files an unfair labor-practice charge against 17 building and construction unions with Region 19 of the National Labor-Relations Board, stemming from a community-workforce agreement (CWA) that unions negotiated with WSDOT as part of the bid specifications for the SR-520 Montlake-to-Lake Washington Interchange and Bridge Replacement project. AGC believes in fair and open competition for contracting and, accordingly, the CWA is flawed because
• a third party has come between employers and their employees
• it is bad for taxpayers
• it harms minority and small contractor, and
• it excludes half of our membership and their workers who do not choose to join a trade union.

Group Retro’s combined refund for AGC Retro members was a record-breaking $63M.

2019   
AGC upgrades its website system and e-newsletter service.

2022   
AGC celebrated its hundredth year of operation — “A Century of Service” — with district and chapter-wide events and celebrations throughout the year.

2023   
AGC introduced a new logo featuring the phrase The Construction Organization, aligning our visual brand with that of AGC of America and most other chapters around the country.