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ERA Architects


Casey House

Casey House
Enclosed glass addition to Casey House
photo of hallway in Casey House
photo of hallway in Casey House
Vaulted ceiling in Casey House
Looking up at vaulted ceiling in Casey House
hallway in Casey House
Detail of wall finishing at Casey House

Casey House

Commissioned in 1875 by clothing manufacturer William R. Johnston, and designed by prominent local architectural firm Langley, Langley & Burke, the former residence at 571 Jarvis is a significant visual reminder of the affluence and grandeur of Jarvis Street during the late nineteenth and early twentieth centuries. Both the exterior and interior of the historic building are designated under the Ontario Heritage Act. The interior is characterized by remarkably well-preserved and striking historic details, including original fireplaces, elaborate ceiling plasterwork, leaded glass windows, and encaustic tile floors. The property was redeveloped by Casey House in 2015 into an award winning, state-of-the-art AIDS/HIV healthcare facility that integrates the original building with a new four-storey “warm modern” extension by Hariri-Pontarini Archietcts.

doublespace photography

ERA worked closely with Hariri-Pontarini on the massing and material palette of the new extension, ensuring that the character of the contemporary building augmented and responded to the Victorian architecture. ERA coordinated extensively with the design team on the interfacing details required to connect the two volumes into a shared “home”. Accessibility solutions, structural modifications, complex building service distribution, and healthcare standards were integrated in a thoughtful manner that preserves the character of the historic building.

ERA’s expertise in heritage conservation was brought to peel back the layers of alterations and unsympathetic treatments from the building to painstakingly restore what had been lost. ERA worked closely with trade specialists to preserve and repair all aspects of the original Victorian house, including the red brick and sandstone exterior, leaded glass windows, elaborate plaster cornices, and extensive woodwork elements on the interior. Working from archival material, the historic sunroom at the southwest corner of the house was reconstructed to its original design.

Casey House
Hariri Pontarini Architects
Jessie Grebenc/Mikael Sydor


  • Canadian Architect: Award of Excellence, 2013
  • Canadian Association of Heritage Professionals: Award of Merit for Conservation: Materials, Craftsmanship and Construction, 2017
  • Lieutenant Governor's Ontario Heritage Award: Excellence in Conservation, 2017
  • Royal Architectural Institute of Canada (RAIC) Awards: Governor General's Medal in Architecture, 2018
  • Ontario Association of Architects: Design Excellence Award, 2018
  • Ontario Association of Architects: Lieutenant Governor's Award for Design Excellence in Architecture, 2018
  • National Trust for Canada: Ecclesiastical Insurance Cornerstone Award, 2018
  • Azure AZ Awards: People's Choice – Social Good, 2018
  • American Institute of Architects: Institute Honor Award for Architecture, 2019
  • National Urban Design Awards: Award of Excellence., 2020

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Interior of University College Library from second floor balcony.
University College University of Toronto