Last edited 27 Mar 2018

Cost plans for construction projects

Cost plans are generally prepared by cost consultants (often quantity surveyors). They evolve through the life of the project, developing in detail and accuracy as more information becomes available about the nature of the design, and then actual prices are provided by specialist contractors, contractors and suppliers:

Initial cost appraisal (studies of options prepared during the feasibility study stage).
Elemental cost plan (prepared during the project brief stage and carried through to detailed design).
Approximate quantities cost plan (from the end of detailed design through to tender).
Pre-tender estimate (prepared alongside tender documentation).
Tender pricing document (strictly speaking this is not a priced document, but is part of the tender documentation issued to the contractor for pricing).
Contract sum (agreed with the contractor during the tender period and adjusted during the construction period).
Contract sum analysis (a break down of the contract sum prepared by the contractor on design and build projects).
Final account (agreed during the defects liability period).

Other than initial cost appraisals, these all relate to the construction cost of the project (rather than wider project costs that the client might incur, which could include; fees, equipment costs, furniture, the cost of moving staff, contracts outside of the main works, and so on). It is important that the client makes clear what costs should be monitored by the cost consultant and what will remain within the control of the client organisation.

Initial cost appraisals are carried out without the benefit of a design for the project. They include client costs that may not feature in later cost plans and as a result will almost certainly need input from the client's finance director or financial advisers.

Once the initial cost appraisal is completed, the client will decide the scope of costs that will in future be monitored by the cost consultant and those that will be monitored and controlled by the client organisation.