- ABROS
- Amec Developments
- Arrowcroft
- Artangel
- Art Thames
- Balfour Beatty Developments
- Baring Houston & Saunders
- BDP
- Bethnal Green City Challenge
- BICC PLC
- British Council
- British Library
- British Waterways
- Royal Brompton & Harefield NHS Trust
- cabe (The Commission for Architecture and the Built Environment)
- Camden Town Crime Prevention Panel
- Candleriggs Market, Glasgow
- Cathedral Group
- Chelsea College of Art
- CIDA (Cultural Industries Development Agency)
- City of London Corporation
- City Fringe Partnership
- Cityside Regeneration
- Civic Trust
- Clerkenwell Green Association of Craftsmen
- Coin Street Community Builders
- Comedia
- Constructive Individuals
- Costain
- Cove Park
- Countryside Properties