Meet Koste

Koste Chartered Quantity Surveyors is committed to saving its clients billions of dollars through tax depreciation schedules. We were founded in 2012 and specialize solely in this field. Our team loves educating our partners on the benefits as it brings out a passion within us!


Koste is one of the leading providers in Australia for tax depreciation schedules. Koste’s product and methodology have made them a market leader, allowing our clients to receive detailed reports at unbeatable fees.

What Makes Koste?

Our People

Our Quantity Surveyors have a wide range of industry experience, both in the commercial and residential sectors.

As Koste grows, we look to employ the very best specialist Quantity Surveyors. They have the necessary skill set to provide clients with a quality product. We look to invest in our people through ongoing training and staff promotion. When you have a happy team of people your client will benefit from exceptional customer services and results.

Our Innovation

Koste is the innovator and leader in the industry, from preparing tax depreciation reports to Asset Services.

Our team develops the latest integrated Tax Depreciation Management tool which will put our clients in the driving seat. We always look to improve not only industry standards and technologies, but also client awareness of cost-saving opportunities. As a result, through CODE asset reporting, clients are able to manage depreciation schedules as a live document with ease.

Our Aim

Our aim is to provide our clients with a product whilst offering innovation and value for money.

Achieving the success of this will ensure our clients continue to work with Koste. Furthermore, we aim to provide our clients with the latest industry update. Therefore, these long term business relationships will be developed with our team for many years to come.

Meet Our Founders


Mark Kilroy MRICS MAIQS Bsc (Hons) Quantity Surveying

Founder & CEO 

Mark is a leading adviser in the property industry, specialising in Asset Services and Tax Depreciation. As the CEO and Founder of Koste Group, a property investor and speaker, Mark is passionate about property and helping others to get benefit from adding value to the property. As a Chartered Quantity Surveyor for nearly 20 years and a Registered Tax Agent, Mark’s skills have been gained whilst working for leading property advisers around the world including; Ernst & Young. BP, Caltex, Land, and CBRE.

Claire Kilroy BA (Hons)

Co-Founder & Director

Claire is one of the founding partners of Koste Group. With a background in Property and Marketing, Claire understands property and the importance of communicating our brand message. As a property investor both in Australia and the UK, Claire is passionate about property. For the last 12 months, Claire has been playing a key role in the expansion of new services to add to our brand, including Huse, eKoste client portal, and eDepreciation.

Our Commercial Services

Depreciation Schedules

A thorough and initial commercial depreciation schedule should be completed upon construction or acquisition of any commercial property. It enables owners to maintain a commercial tax depreciation schedule, to maximize their tax returns. As Quantity Surveyors, we identify and estimate all eligible depreciating assets - including capital works and plant and equipment assets! Our AIQS and RICS qualified Quantity Surveyors conduct assessments documenting evidence in accordance with ATO substantiation requirements.

Asset Registers

Our detailed asset registers are compiled through a comprehensive survey carried out by our Quantity  Surveyors. A detailed asset register will provide you with a full list of assets, which in turn will assist with compliance, audits , sinking funds, asset planning and ongoing commercial tax depreciation.

Balancing Adjustments

Often overlooked are the deductions you may be entitled to upon demolition of an asset. Whether it is capital works or a depreciating asset, the un-deducted value (written down value) of the asset can be claimed in the year of demolition.

Tenant Abandonment

Upon lease expiry the capital works component of the tenants fit out reverts to the landlord if the fit out is not demolished. Our assessment identifies the eligible capital works component.

Trusted by Professionals

Koste is a leader in Tax Depreciation because that is all we do. We know all of the finer aspects of property tax depreciation, which is why leading professionals trust in Koste for their property tax depreciation.
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