Top 10 Questions to Ask Your Quantity Surveyor
Ten interview questions to compare QS firms and avoid unclear scope or weak cost reporting.
By Contractor Scale Editorial | Checklist | 2026-05-12
Question 1-3: Fit, scope, and method
1) What comparable projects have you delivered recently? 2) What is included and excluded in your fee? 3) How do you build and test estimates?
These three questions establish whether the firm has real project fit and a transparent methodology.
Question 4-6: Risk, tendering, and reporting
4) How do you set and manage contingency? 5) How do you normalize bids with different assumptions? 6) How do you report variations and forecast final cost during construction?
These responses reveal whether the team can support decision-making under pressure, not only produce static documents.
Question 7-10: Collaboration and accountability
7) How do you coordinate with architects, engineers, and builders? 8) What cost risks do you see on my project type? 9) Can you show a sample report? 10) What defines success at closeout?
A strong firm can answer with specifics, evidence, and measurable outcomes.
How to run the interview process
Interview at least three firms with the same question set and score responses for relevance, clarity, and evidence.
Compare fees only after service-fit scoring is complete so you do not reward incomplete scope.
Supporting internal resources
Use /blog/quantity-surveyor-vs-estimator-whats-the-difference to confirm role fit and /cost-guides/renovation-budget-breakdown when discussing allowance realism.
Build your shortlist from /quantity-surveyors/auckland, /quantity-surveyors/wellington, or /quantity-surveyors/christchurch.
Next Step
Apply this 10-question scorecard to every interview, then appoint the firm with strongest method and reporting fit.