Quantity surveyor

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A quantity surveyor (QS) is a professional working within the construction industry concerned with construction costs and contracts.

Services provided by a quantity surveyor may include:

  • Cost planning and commercial management throughout the entire life cycle of the project from inception to post-completion
  • Value engineering
  • Risk management and calculation
  • Procurement advice and assistance during the tendering procedures
  • Tender analysis and agreement of the contract sum
  • Commercial management and contract administration
  • Assistance in dispute resolution
  • Asset capitalisation
  • Interim valuations and payment assessment
  • Cost management process
  • Assessing the additional costs of design variations

Traditional quantity surveying services[edit]

  1. Cost planning
  2. Estimating
  3. Contracts negotiation
  4. Procurement advice
  5. Preparing Bill of Quantities (BOQ)
  6. Monitoring Budget
  7. Preparation of Payment Invoice and certification
  8. Assessment of variations
  9. Dispute resolution
  10. Preparing feasibility studies
  11. Cost control
  12. Value engineering

Future services expected[edit]

  • Investment appraisal
  • Advice on cost limits and budgets
  • Whole life cycle costing
  • Value management
  • Risk analysis
  • Insolvency services
  • Subcontract administration
  • Environmental services measurement and costing
  • Technical auditing
  • Planning and supervision
  • Valuation for insurance purposes
  • Project management
  • Administering maintenance programmes
  • Advice on contractual disputes

Professional duties[edit]


  1. Provide procurement and contractual advice
  2. Provide 'Order of Magnitude' costs for construction projects
  3. Refine, monitor and control costs during design development
  4. Prepare contract documentation
  5. Prepare pre-tender estimates

Tender review[edit]

  1. Identify cost-risks in tender returns
  2. Prepare tender reports
  3. Recommend preferred tenderer
  4. Quantity Surveyor have responsibilities to make the communication between project management and construction team

Major firms[edit]

  1. Turner & Townsend is the largest independent global quantity surveyor
  2. Davis+Langdon was purchased by Aecom, thereby losing its independence
  3. Gardiner & Theobald is mainly UK based, with a number of offices overseas
  4. Cyril Sweet is listed on the London stock exchange