← Back to blog

Top quantity surveyors companies

If you're a homeowner in Sydney, developer in Melbourne or investor in Brisbane, securing the right quantity surveyor (QS) is crucial. A top QS helps you manage costs, keep your project ATO-compliant and under control. In this guide, we cover the top quantity surveyors companies in Australia—with TDQS top of the list—plus FAQs, tips, and pointers so you can choose the best one for your project.

Why you need Quantity Surveyors for your Building Projects

A quantity surveyor is your financial co‑pilot in property development. They’ll prepare detailed cost plans, manage tenders and contracts, track progress claims, and compile ATO‑compliant depreciation schedules. This means fewer budget surprises, maximised tax deductions, and better cash flow all round .

Factors to Consider When Choosing a Quantity Surveyor

Not all QS firms are created equal. Here's what to keep an eye on:

  • Accreditation & licensing: Must hold AIQS or RICS memberships; for depreciation reports they should be a TPB‑registered tax agent (Source: Koste).
  • Project experience: Choose a firm that’s worked on builds similar to yours—strata, residential, infrastructure, etc.
  • Specialisation: Some firms focus on depreciation, others on carbon, forensic auditing, or large-scale cost control.
  • ATO compliance: Ensure depreciation schedules comply with ATO Division 40/43 (Source: Koste).
  • Geographic reach: Firms like TDQS, DCWC and Slattery are national—and vital if you’re investing interstate.
  • Tools & technology: BIM, cost software, carbon tools = greater transparency and accuracy.
  • Clear comms: A brilliant QS explains things plainly—no jargon overload.
  • Value vs cost: The cheapest quote isn’t always best—judge what’s included and support after delivery.
  • Reputation: Look for strong case studies, testimonials, and industry recognition.

15 Common Questions About Quantity Surveyors in Australia

1. What does a QS do?
They manage financials—cost planning, tendering, contracts, progress claims, plus ATO‑compliant depreciation schedules (Source: Wikipedia).
2. Why hire one?
They protect budgets, minimise cost creep, and maximise depreciation benefits.
3. What qualifications should they have?
Preferably AIQS or RICS accreditation—and TPB‑registered if doing depreciation (Source: Koste).
4. What’s the cost?
Depreciation reports start ~A$1,000; cost consulting may be hourly or percentage‑based.
5. How to compare quotes?
Look at turnaround, service depth, tech used and ATO compliance—not just price.
6. Useful for renovations?
Definitely—they prevent overspend and help claim depreciation.
7. Do they do depreciation schedules?
Yes—TDQS, DCWC and Slattery offer them to boost investor return.
8. How long is a report turnaround?
Typically 1–3 weeks, depending on property complexity.
9. Accepted by ATO?
Yes—if completed by qualified, registered professionals (Source: TDQS).
10. What’s post‑loss QS?
Forensic cost reporting for insurance claims—DCWC is a key player here.
11. Do they work with developers?
Absolutely—DCWC, Slattery and others regularly support large-scale developments.
12. Strata/body corporate advice?
Yep—many QS firms handle depreciation reports and financial forecasting for strata schemes.
13. When should I engage one?
Early—ideally at feasibility or design stage for best cost management and risk controls.
14. Can they act as expert witnesses?
Yes—especially DCWC—with dispute services and forensic reporting.
15. How to verify qualifications?
Request AIQS/RICS membership and TPB‑registration proof; ask for case studies or LinkedIn profiles.

Five Relevant Topics for Choosing a Top Quantity Surveyor

  1. “Impact of Technology & AI in QS Services”
    Explore how firms using BIM, AI, drones, and cost software gain an edge in accuracy, automation, and risk prediction—an increasingly vital consideration for investors and homeowners. For instance, AI can improve project estimation and risk detection 

  2. “Sustainability & Carbon Planning Integration”
    With carbon accounting rising in importance, buyers want firms that balance cost control with environmental impact. Leading QS firms (like Slattery) offer carbon strategies alongside QS services.

  3. “Post-Loss & Forensic QS Expertise”
    Highlighting companies that handle insurance claims, defect analysis, or disaster recovery (e.g. Crawford & Co.) reassures users seeking specialists for risk management and rebuild costing.

  4. “National Reach vs Local Presence”
    Comparing national firms (TDQS, DCWC, WT) to boutique/local QS providers helps users understand the trade-off between consistent interstate coverage and local market familiarity.

  5. “Regulatory & ATO Compliance for Depreciation Schedules”
    AI overviews often emphasise the value of TPB‑registered firms and strict adherence to ATO Division 40/43 rules—touching on professionalism and tax-deduction legitimacy.


Final Take

So, who’s top of the pops? For depreciation optimisation, ATO‑compliance, top-tier accreditation and personalised service—TDQS is the firm to beat. But if you're after large-scale projects or multi-sector solutions, DCWC and Slattery are heavyweight contenders with national expertise. Your best move? Engage early, compare thoroughly, and choose a QS aligned with your project vision—then you’ll be set to build on time and on budget, no dramas.