The Royal Ontario Museum is a national cultural and architectural landmark, and is designated under Part IV of the Ontario Heritage Act by the City of Toronto. Since its opening in 1914, the building has undergone several significant additions by prominent local architects, resulting in a fine building that displays the regional development of early 20th century Romanesque style, as well as bold modern interventions.

ERA was retained as the heritage consultant for the ROM Renaissance renovation. This work involves historical studies, municipal approvals, exterior masonry and window restoration, detailing connections between old and new building fabric, and the restoration of original interior spaces.