Local Authorities
- Barking and Dagenham Borough Council
- Forest of Dean District Council
- Liverpool City Council
- Northamptonshire County Council
- Westminster City Council
Government Agencies and National Organisations
- English Heritage
- Homes and Communities Agency (HCA)
- Natural England
- Olympic Delivery Authority (ODA)
- South East England Development Agency (SEEDA)
Developers and Land Agents
- Bellway Homes
- Countryside Properties
- Crest Strategic Land
- Kier Land
- Taylor Wimpey
Local Organisations and Trusts
- Historic Chapels Trust
- Lee Valley Regional Park Authority
- Letchworth Garden City Heritage Foundation
- Nene Housing Society
- ReBlackpool
Companies and Corporate Land Owners
- AXA Sunlife
- BUPA Property
- Center Parcs
- Npower Renewables
- UK Coal
Rural Land Owners and Estates
- Church Commissioners
- Duchy of Lancaster
- Jesus College, Oxford
- Trinty College, Cambridge
- Woburn Estate
