- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 07 Aug 2018
Contractual tree for building design and construction
A contractual tree is a diagram illustrating the contractual relationship between the parties involved in a project. This might include contracts between; funders, the client, consultants, sub-consultants, contractors, sub-contractors and suppliers and may include ‘secondary’ agreements which are associated with the 'primary' contracts, such as collateral warranties. On complex projects such as a PFI projects it may include other project agreements such as concession agreements.
The contractual tree only shows legal relationships, it does not set out reporting lines or limits of authority and is not the same as an organisation chart. For example, on construction management projects, trade contractors might report to the construction manager, but their legal relationship is with the client.
 Find out more
 Related articles on Designing Buildings Wiki
Featured articles and news
How are bids evaluated?
Ensuring products contribute to personal safety.
Is there light at the end of the tunnel?
A new theory for managing large complex projects.
A new guide to fire safety and security in the selection of doorsets.
Review of the long-awaited discourse on these beautifully produced, colourful wallpapers.
Well-designed lighting helps maintain a healthy physiological and psychological balance.
Transferring the risk for obtaining the target BREEAM rating.
A simple but effective way to determine the root cause of an issue.
BSRIA report suggest the European market will double to 415 million Euros by 2023.