About Us Founded in 1988, Andersen, Tate & Carr is the largest business law firm in Gwinnett County and has become one of the preeminent law firms in suburban Atlanta by offering unparalleled legal representation in real estate and banking, business, civil litigation, zoning & land use, government relations & lobbying, estate planning matters and criminal law. Today, ATC Law Firm stands as one of the area's most respected law firms, matching the expertise and sophistication of a "Downtown Firm" with "Small Town Firm" personal attention and dedication to our clients' needs.