Through advocacy and direct action, Architectural Conservancy Ontario has been involved in preserving Ontario's architectural and environmental heritage since 1933 by helping communities and owners preserve buildings and structures of architectural merit, and places of natural beauty or interest.

ACO is a charitable organization operating through a network of 15 autonomous local branches in communities across Ontario, linked by a small co-ordinating office in Toronto, and governed by its Executive and Provincial Council.

Find your nearest branch in: 
- Clarington
- Cobourg & East Northumberland
- Collingwood
- Hamilton Region
- Cambridge
- London Region
- Muskoka
- North Waterloo Region
- Port Hope
- Prince Edward County
- South Bruce-Grey
- St. Catharines
- Stratford-Perth County
- Toronto
- Windsor-Essex

Architectural Conservancy Ontario

Org chart

Teams

Offices