About Us
Koste Chartered Quantity Surveyors
Koste is an Australian chartered quantity surveying firm founded to make professional QS services accessible to every property owner. We specialise in tax depreciation schedules, insurance replacement cost valuations, CGT cost base evidence reports, and national construction cost data.
Our Team & Credentials
- Led by Mark Kilroy BSc (Hons), MAIQS, CQS, MRICS — Founder and Chartered Quantity Surveyor
- Members of the Australian Institute of Quantity Surveyors (AIQS) and Royal Institution of Chartered Surveyors (RICS)
- Tax Practitioners Board (TPB) registered — ATO-compliant reports accepted by all major accounting firms
- Offices in Queensland, New South Wales, Victoria — serving all Australian states and territories
- Over 40,000 reports prepared since founding
- 26% year-on-year growth in 2025 — RICS Quantity Surveying Team of the Year (Highly Commended 2025)
Why Koste?
We are the only Australian firm focused exclusively on Asset and Tax Opportunities. That specialisation means every process, system, and team member is oriented toward a single outcome: identifying every legitimate deduction and cost for our clients.
Every Koste report includes a full Audit Support Pack — methodology notes, inspection evidence, and ATO legislative references — so your claim is defensible if the ATO asks.
Our Services
Phone: 1300 669 400 | Email: info@koste.ai | Address: Riva Offices, 2/14 Edgewater Court, Robina QLD 4226