Architectural Resources Group (or ARG; also known as Architects, Planners & Conservators, Inc.) is a firm founded in 1980 by Bruce Judd and Steve Farneth in San Francisco, California. It began by providing professional services in the fields of architecture and urban planning with particular expertise in historic preservation. In 2000, David Wessel, a Principal of ARG, founded a separate conservation-contracting division, ARG Conservation Services which operates under the same roof as ARG. By 2005, the firm had expanded to a full-service architecture firm with 50+ employees. ARG also opened offices in Pasadena serving Southern California, and Portland, Oregon, serving the Pacific Northwest.

Because of the complex range of issues common to preservation projects, the firm associates with consultants in diverse fields such as architectural history, preservation technology, building pathology, urban planning, building materials, engineering, real estate, and economics.^[1]

ARG was among the first architecture firms in the United States to include architectural conservators as staff members.^[2] ARG has provided a range of services for various National Historic Landmarks, buildings listed on the U.S. National Register of Historic Places, local historic districts, and other culturally significant sites.

The firm and its projects have received more than 100 awards in design excellence, conservation, and planning, including those sponsored by the National Trust for Historic Preservation, the American Institute of Architects, the California Governor's Office, and the California Preservation Foundation. In 2006, ARG received the Firm of the Year Award from the AIA California Council.^[3] In 2016, ARG was honored with a Palladio Award for its Steven S. Koblik Education and Visitor Center at the Huntington Library.^[4]

ARG retains close alliances and involvement with national and international preservation policy and advocacy organizations such as the Office of the United States Secretary of the Interior, National Trust for Historic Preservation, ICOMOS, DoCoMoMo, the Association for Preservation Technology International, and the American Institute for Conservation of Historic and Artistic Works.