A quantity surveyor is responsible for managing and controlling the costs of a construction project, ensuring it is delivered within budget.
They provide commercial and cost advice throughout the project lifecycle, from early feasibility through to final account settlement.
Key Responsibilities of a Quantity Surveyor
- Preparing cost estimates and budgets
- Developing cost plans during design stages
- Managing procurement and tendering
- Valuing work completed on site
- Monitoring cost and reporting financial performance
- Agreeing final accounts at project completion
The quantity surveyor ensures that costs are properly controlled and that the project remains financially viable.
Role Across the Project Lifecycle
- Feasibility: preparing initial cost estimates and appraisals
- Design: developing detailed cost plans and advising on value
- Procurement: managing tendering and contractor selection
- Construction: managing valuations, variations and reporting
- Completion: agreeing final accounts and closing out costs
Learn more about project stages in our guide to construction project stages.
Client-Side vs Contractor Quantity Surveyors
Client-Side Quantity Surveyor
- Represents the client’s financial interests
- Provides independent cost advice
- Monitors budgets and financial risk
Contractor Quantity Surveyor
- Manages commercial aspects of construction delivery
- Controls costs and subcontractor payments
- Maximises project profitability
Relationship with Other Roles
Quantity surveyors work closely with:
- Project managers
- Employer’s Agents
- Architects and design teams
- Contractors and subcontractors
Cost control is closely linked with programme and risk management, requiring coordination between all project stakeholders.
Risks Without Effective Cost Management
- Budget overruns and uncontrolled costs
- Poor financial visibility during construction
- Inefficient procurement decisions
- Disputes over valuations and payments
- Unexpected final account increases
Effective quantity surveying provides structure, transparency and control over project costs.
Cost Consultancy Services
For professional support, see our cost consultancy services, which provide structured cost management across all project stages.
Planning a Construction Project?
BuildAlliance provides cost consultancy and client-side support to help manage budgets, control risk and deliver projects successfully.
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