The cost management process follows a structured sequence that aligns with the RIBA Plan of Work. Each stage focuses on reducing risk, improving clarity and ensuring that the project can be delivered within an agreed budget.

The process begins with feasibility and early cost advice. At this point, the cost manager develops an initial budget based on benchmarking, project constraints and early design intent. This is where assumptions around buildability, site conditions, planning constraints and procurement routes are explored.

Early cost modelling is essential because decisions made at this stage have the greatest financial impact. A realistic feasibility budget ensures the design team works within defined parameters and prevents a cycle of later redesign.

Cost planning then becomes the priority during RIBA Stages 2 and 3. The cost manager analyses the developing design and produces an elemental cost plan that breaks the project into measurable components. This plan highlights where costs are concentrated, where risk sits and whether the design aligns with the approved budget.

Through regular updates and proactive communication, the cost manager helps the design team refine the scheme without compromising quality. Effective Stage 2 and 3 cost planning prevents misalignment between expectations and actual build cost.

Procurement and tendering follow once the design is sufficiently developed. The cost manager advises on the most suitable procurement route for the project’s complexity, risk profile and timescales.

They prepare the tender package, issue schedules or bills of quantities and analyse contractor submissions to identify clarifications, exclusions or pricing anomalies. A controlled procurement process ensures that contractors are pricing consistent information and provides the client with transparent comparisons.

During construction, the focus shifts to active cost control. The cost manager monitors valuations, assesses variations, updates cash flow forecasts and maintains visibility of expected final costs. A disciplined approach to change control ensures that any design or site-driven changes are understood, recorded and evaluated before they impact the budget. Clear cost reporting throughout construction helps prevent disputes and keeps all stakeholders aligned.

The process concludes with the final account. This stage involves reviewing the contractor’s submissions, checking measured works, agreeing variations and ensuring the account complies with contractual requirements.

A well-managed final account provides financial closure and gives the client full transparency on project expenditure. Effective final account management protects the client’s interests and ensures the project is completed with confidence and clarity.