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.

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National Ballet School of Canada

High Line

Cooper Mansion

High Line

Former Winchester Hall and Hotel

High Line

©2026 GBCA

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