GBCA | Architecture Firm | Toronto & Hamilton GBCA | Architecture Firm | Toronto & Hamilton GBCA | Architecture Firm | Toronto & Hamilton

GBCA is a Toronto & Hamilton architecture firm with 50+ years of experience in adaptive reuse, restoration, heritage & technical consulting.

  • Home
  • About Us
  • Services
  • Projects
  • News
  • Contact
  • Request A consultation

Institutional

Bruce County Museum

High Line

National Ballet School of Canada

High Line

Legislative Assembly of Ontario

High Line

PAMA Peel Region Art Gallery, Museum & Archives

High Line

Don Jail Governor’s House and Gatehouse

High Line

Theatre Centre

High Line

Humber College Building G

High Line

Mackenzie Hall

High Line

Osgoode Hall

High Line

©2026 GBCA

Our new website is taking shape. Some pages are still under construction. Thank you for your patience as we put the finishing touches on.

Got it!
Close Welcome Bar