The Building Industry Association of Southern California, Inc. (BIASC) is a cohesive nonprofit trade association organized into chapters and councils, and having a regional presence through its principal office. They are comprised of builders, developers, contractors, subcontractors and associated professionals in residential and general construction throughout Southern California and others wishing to join in the Association.

BIASC is a full service organization providing legislative, educational, labor relations, and community relations programs through its chapters and councils and through the principal office directly. The association objective is to promote a positive business environment for the building industry. BIASC serves its members first and foremost, followed in order by its Chapters and Councils. BIASC serves its Chapters by protecting and promoting regional common interests to ensure the success of its members in the building industry as they provide homes for all.