On construction projects there may be a large number of professional consultants involved, all carrying out separate roles. The number of consultants depends on the size of the project and who appoints them will depend on the type of procurement. However, for most projects, the key consultants remain the same. This Practice Note explains what each of the key consultants does and highlights their main duties.

For an explanation of the roles of the parties typically involved in a construction project (including the consultants but also the employer, contractor and sub-contractor), see Practice Note: Parties in a construction project.

For an illustration of the contract structure of a typical construction project, and the way that the consultants fit into it, see: Structure of a development project—diagram.