3rdLine.Studio is a mid-sized architectural practice based in Sudbury, Ontario. Established in 1984 by Dennis Castellan and Peter Dewit, the office has been in practice for over 35 years. Offering a full range of architectural services our built portfolio includes residential, commercial, institutional and industrial work across Northern Ontario and beyond. In its 35 years of practice 3rdLine.Studio has built its reputation upon leading, designing and delivering creative architectural solutions that respect both function and finance. Today, the studio has a staff of 15 that brings together a diverse team of Architects, Intern Architects, Technologists, Professional Quantity Surveyors, Professional Project Managers, and Contract Administrators.