Paul Shaw, Brian McLellan and David Melitzer established a law partnership in early 1977 with an office in Collingwood. In 1978 the partnership acquired the Thornbury practice of John Metras, Q.C. John became the City Solicitor for the City of Brampton, a position he held for 25 years until his semi-retirement. In 1983, David Melitzer made a career change and became assistant Town Solicitor for the Town of Richmond Hill.
Paul and Brian continued to practice in partnership and were joined in 1983 by Jim Ironside who articled with the firm. Jim became a partner in 1988 and thus established the law firm name of "Shaw McLellan & Ironside". Jim has since established his own law firm in Collingwood.
In 1982 Shaw McLellan moved its Collingwood office to the historic Schoolhouse Lane building. The law office expanded to take over the complete second story of the building in 1993, when the Thornbury and Collingwood practices were consolidated at the Schoolhouse Lane location.