Welcome to Koste Chartered Quantity Surveyors
Property Tax, Cost Evidence and Quantity Surveying
Koste helps property investors and professional partners identify property deductions, prepare evidence for Capital Gains Tax and access independent quantity surveying advice across Australia.
Property AI Agent
Ask Eva about your property
Enter a property address or tell Eva what you are trying to do. Eva will help work out what matters and guide you to the right next step.
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For Investors
Property owners & wealth builders
Free Property Record — organise purchase details, improvements and evidence
Understand your record's completeness and what to add next
Prepare early for the 1 July 2027 CGT changes
Professional depreciation schedules & CGT cost base reports
Free calculators, tools & investor knowledge hub
For Investors
Property owners & wealth builders
Free Property Record for your investment property
Prepare early for the 1 July 2027 CGT changes
Free calculators, tools & knowledge hub
Swipe for Partners →
Capital Gains Tax Is Changing From 1 July 2027
Properties held across 1 July 2027 may require the capital gain to be divided between the period before the change and the period after it. Property improvements, depreciation records and historical costs may all affect the final result.
Your Property Record. Free.
Bought your property years ago? Records incomplete? That's normal — and it's exactly what your free Koste Investor Account helps you organise, well before you ever sell.
Organise
One secure record of your property — purchase details, improvements, invoices and photos.
Understand
See how complete your record is and what evidence would strengthen it.
Prepare
Be ready for the 1 July 2027 CGT transition with your records in order.
Where do you start?
What's your situation?
Jump straight to the answers and tools most relevant to you.
Every Report Your Property Needs
Prepared by Chartered Quantity Surveyors. ATO-compliant. Delivered fast.
Tax Depreciation Schedules
Average $9,000+ first-year deduction. From $695+GST.
Learn More →
Lifecycle & Capital Planning
30-year capital expenditure forecasts for strata & commercial.
Learn More →Property Investor Reports
Tax Depreciation Schedules
Average $9,000+ first-year deduction. From $695+GST. Delivered in 5 business days.
Learn More →CGT Cost Base Reports
Reconstruct renovation costs for Capital Gains Tax. ATO-accepted methodology.
Learn More →Commercial Property & Business Reports
Lifecycle & Capital Planning
30-year capital expenditure forecasts for strata, commercial & government.
Learn More →Quantity Surveying & Construction Cost Advice
Free Property Calculators and Tools
Start with a free calculator, then order the report that matches your situation.
2027 CGT Calculator
Estimates capital gains tax under the split-period rules from 1 July 2027.
Tax Depreciation Calculator
Estimates your first-year and five-year depreciation deductions.
Construction Cost Calculator
Estimates build costs by property type, size and location.
Renovation Cost Calculator
Estimates renovation and improvement costs for cost base records.
Insurance Replacement Cost Estimator
Estimates the true rebuild cost of your property for insurance.
Rental Yield Calculator
Calculates gross and net rental yield on any property.
From Order to Report in 3 Steps
No site visits required from you. No chasing paperwork. Just a fast, professional report your accountant can use.
Order Online
Complete a short order form in under 3 minutes. We confirm your booking immediately and coordinate access with your property manager or tenant.
Site Inspection
A qualified Chartered Quantity Surveyor inspects your property. You don't need to be there — we handle all access arrangements for you.
Report Delivered
Your ATO-compliant depreciation schedule arrives digitally within 5 business days, complete with an Audit Support Pack — ready for your accountant.
Order Online
Complete a short order form in under 3 minutes. We confirm your booking immediately and coordinate access with your property manager or tenant.
Site Inspection
A qualified Chartered Quantity Surveyor inspects your property. You don't need to be there — we handle all access arrangements for you.
Report Delivered
Your ATO-compliant depreciation schedule arrives digitally within 5 business days, complete with an Audit Support Pack — ready for your accountant.
Audit Support Pack — Included as StandardLearn more →
Every Koste report comes with full methodology notes, inspection evidence, and ATO legislative references. If the ATO ever queries your claim, we've got you covered.
Why Choose Koste AI?
Koste AI combines advanced artificial intelligence with the professional insight of Chartered Quantity Surveyors — transforming property depreciation into a precise, compliant, and intelligent process.
Smarter Analysis
AI algorithms analyze property data patterns to identify maximum depreciation opportunities — reviewed and verified by our Chartered Quantity Surveyors to ensure no deductions are missed and every outcome meets professional standards.
Faster Processing
Koste AI streamlines complex calculations and report generation, enabling our Chartered Quantity Surveyors to deliver depreciation schedules faster — without compromising accuracy, compliance, or professional oversight.
More Reliable
With AI handling data validation and our Chartered Quantity Surveyors overseeing every report, Koste ensures every outcome is accurate, ATO-compliant, and professionally certified for total confidence and transparency.
Smarter Analysis
AI finds maximum depreciation opportunities, reviewed by Chartered Quantity Surveyors for full compliance.
Faster Processing
Streamlined calculations deliver your depreciation schedule faster — without sacrificing accuracy.
More Reliable
AI validation + professional CQS oversight means every report is accurate and ATO-compliant.
Swipe to explore →
Led by Mark Kilroy BSc (Hons), MAIQS, CQS, MRICS
Founder and Chartered Quantity Surveyor
"At Koste, we combine the precision of AI with the accountability of human expertise. Every report we deliver is guided by professional judgement and backed by data-driven intelligence — ensuring accuracy, compliance, and confidence in every result."
Trusted by leading professionals who value innovation, accuracy, and efficiency
Why Choose Koste Chartered Quantity Surveyors?
Join Australia's most trusted property tax specialists and unlock exclusive opportunities for growth, expertise, and success
For Property Professionals
Brokers • Agents • Accountants • Developers
Investor Hub Access
Your clients receive reports at preferential partner pricing (retail $695 + GST) plus complimentary Investor Hub access
Outsourced Partner Tools
Embed our calculators on your website with your branding and logo
Lead Management
Real-time dashboard to track leads, conversions, and earnings
Training & Certification
Comprehensive training modules and professional certification
For Property Investors
Build • Grow • Optimize Your Portfolio
Save $5,000+ Annually
Professional depreciation schedules and tax optimization strategies
Expert Community
Connect with 2,800+ investors and qualified professionals
Portfolio Analytics
Track performance, ROI, and optimization opportunities
Professional Reports
ATO-compliant depreciation reports from $550
Property Professionals
Brokers · Agents · Accountants
Partner Pricing
Preferential client pricing (retail $695 + GST)
White-label Tools
Embed calculators with your branding
Lead Dashboard
Track leads, conversions & earnings
Property Investors
Build · Grow · Optimize
Save $5,000+ Annually
Professional depreciation & tax strategies
Expert Community
2,800+ investors & qualified professionals
ATO-Compliant Reports
Depreciation schedules from $550
Swipe for Investors →
Ready to unlock your potential? Join thousands of professionals and investors who trust Koste AI to grow their business and wealth through intelligent automation.
Meet Koste
Australia's only firm focused exclusively on Asset & Tax Opportunities.
Chartered Quantity Surveyors operating to RICS standards — every report reviewed by a specialist, every client outcome backed by proprietary technology built in-house.
Professionally Accredited & Award-Winning
Our expertise is backed by industry-leading certifications and recognition from Australia's most respected professional bodies
AIQS | CQS
Certified Quantity Surveyors (CQS)
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TPB
Registered Tax Agent
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RICS
Regulated by RICS
RICS Awards 2025
Highly Commended
Quantity Surveyor of the Year
AWARDS
FINALIST
2022 | 2023 | 2024 | 2025 | 2026
RICS Awards Finalist
Finalist for Five Consecutive Years
2022 | 2023 | 2024 | 2025 | 2026
2026
FINALIST
Built Environment Awards 2026
Finalist
Individual Excellence in Quantity Surveying
Professional Standards Guarantee
Our team holds the highest professional qualifications in quantity surveying, tax practice, and property valuation. Every depreciation schedule is prepared by certified professionals and backed by comprehensive professional indemnity insurance, ensuring ATO compliance and complete peace of mind for our clients.
Trusted by Industry Leaders
Australia's leading property professionals rely on Koste Chartered Quantity Surveyors
Interactive Articles
Learn property investment strategies with our hands-on interactive guides and calculators
Ready to elevate your client experience?
Join thousands of professionals who trust Koste tools to deliver exceptional property analysis.
Call 1300 669 400 or email info@koste.ai