The quality of a cost plan depends as much on scope definition as measurement. Early-stage information can still support a useful estimate, provided the design status, exclusions and allowances are stated clearly.
At a glance
- Issue the latest coordinated information and identify superseded drawings.
- Explain programme, staging, procurement and client-direct scope as well as the physical design.
- Tell the QS what remains unresolved so allowances can be explicit rather than hidden.
Current architectural information
Provide the latest plans, elevations, sections, area schedules, room layouts, door and window schedules, reflected ceiling plans and finish schedules that are available. The drawing issue date and design stage should be clear.
If there are competing options, identify which option is the current base case and which alternatives need separate pricing.
Structure, services and site information
Structural drawings, civil information, geotechnical reports, survey information and available mechanical, electrical, hydraulic, fire and vertical-transport documentation can materially change the cost plan.
For early stages, even a consultant design brief or written services strategy is better than assuming a generic allowance without context.
Scope boundaries and client requirements
Confirm what is included in the construction budget: loose furniture, equipment, specialist fitout, landscaping, authority works, utility upgrades, client-supplied items, demolition, decanting, temporary works and off-site works can all sit inside or outside different budgets.
Quality expectations, sustainability targets, acoustic requirements, security and specialist operational needs should also be identified.
Programme, staging and procurement
Target tender and construction dates, staging, occupied-site constraints, proposed contract type and procurement strategy affect preliminaries, escalation, risk allocation and tender pricing.
If the project needs early works, separable portions or live-environment construction, say so before the cost plan is finalised.
Previous budgets, quotations and decisions
Earlier cost plans, feasibility budgets, tender returns, contractor quotations and value-management decisions help explain how the project has moved. They also provide useful project-specific evidence that may be stronger than a generic benchmark.
Most importantly, identify unresolved design decisions. A transparent allowance with a stated basis is more useful than presenting an uncertain item as confirmed scope.