Free quotes. Obligation free advice.
We're here to help you.


GQS specialise in offering a transparent, in depth and collaborative approach towards the production of accurate and reliable historical, future and current construction cost advice for taxation, insurance, strata and retirement village purposes. We are experts in non-traditional quantity surveying services. We are also experts in Building Consultancy and Defect Management / Inspections with in-house registered building inspectors.

Our Mission Statement

A FAMILY owned and run Firm, investing in EFFICIENT technologies and FREEDOM of work practices driven by the PASSION for what we do and the financial IMPACT we can have on people and businesses.

We have delivered some of the most complex projects for Client’s all over Australia.

Our experience will provide valuable input to any investment, business or personal, often saving you thousands of dollars.

Meet the team

Zac Gleeson

Zac founded GQS in 2017 through relying on his expertise and experience across many facets of Quantity Surveying. He has a reputation for a highly professional results-driven approach and has led project teams on the firm’s largest and most challenging projects, some in excess of $1b . He is committed to helping his clients and ensuring they receive maximum benefit. A family man, now based out of our Sunshine Coast office predominantly, Zac oversees all operations Australia-wide as our Managing Director.

Chris Podmore

Chris is a senior level Quantity Surveyor who manages the majority of our Brisbane, Gold Coast and regional QLD work whilst heading up our Brisbane office. Chris is highly experienced in Sinking Fund Forecasts, Insurance Valuations, Tax Depreciation and Financier QS services. Chris’ experience ranges from samller residential or commercial properties to $1b+ multi-layered complex developments. His approach leads the way for favourable and realistic outcomes for all property stakeholders.

Anthony Gleeson

Anthony has been a part of the GQS team since 2018. As a previous business owner, current property investor, qualified book keeper and all-round tax guru, Anthony is the go-to for anything investment property and tax depreciation related. Anthony manages day-to-day our tax depreciation services all across Australia. Anthony also heads up our internal process system management with a wide ranging suite of experience across our IT related platforms.

John Derickx

John is a highly experienced QBCC registered building inspector and licensed builder. John has held management roles with large commercial builders, retirement village operators and assisted clients such as Coles supermarkets with project delivery. For many years John was on the Builders side of the fence managing defect rectification for large commercial builders or developers. This experience has become invaluable in protecting our clients interests knowing in great depth the building code and defect management process.

Zena Sciacca

Zena manages our administration and client services as well as the coordination of our team of inspectors. Many of you would have had beautiful interactions with our Zena. She is highly experienced and knowledgeable having worked with professional quantity surveying and property related firms for almost two decades in both specialist consulting and administration roles. She is well versed in all things property and property development and is also a licensed real estate agent.

Ben Payne

Ben is a highly experienced commercial scale builder and QBCC registered building inspector. Prior to putting down the tools and concentrating on defect inspections Ben held building supervisor roles for many large scale developments in South-East QLD, Melbourne and the UK. Since joining GQS Ben has assisted large scale developers, bodies corporate and residential investors through his building inspections and defect audit consultancy role. Ben’s keen eye for detail and knowledge of the building code and relevant legislation ensures our customers are covered now and well into the future.

Sharna Gleeson

Sharna manages our Accounts department part-time. She has been an integral part of the growth of the business since day one and continues to provide support across many facets of the business. Sharna is also a registered Nurse and passionate about assisting our charity partner Ambulance Wish.

Lachlan Renshaw

Lachlan is a fully licensed and CASA accredited drone operator as well as our junior estimator. Lachlan’s drone skills allows him to team up with our Building Inspectors to assist in delivering safe, efficient and detailed roof condition / defect assessments – quite often in restricted airspace. Lachlan also assists our team with measuring and estimating throughout our QS suite of services and is proficient in the use of CostX measurement software.

Lewis Chapman

Lewis is an Assistant Quantity Surveyor currently studying his bachelor’s degree in quantity surveying. Lewis assists our QS team with inspections, measuring and estimating throughout our QS suite of services and is proficient in the use of CostX measurement software.

Latoya Jones

Latoya is an experienced administrator and customer service representative having worked with Accounting practices, law firms and state government agencies. She is integral to the successful delivery our workflow and is often the friendly voice on the other end of the phone line.